Corn nutrient status and herbicide application in hot weather

In this episode, Brad Carlson, water resources extension educator, and Dan Kaiser, extension nutrient specialist, discussed nutrient availability in corn, especially nitrogen based on previous crops, use of urea, and other nutrients, such as sulfur. Joe Ikley, Extension Weed Specialist at North Dakota State University also discussed weed and herbicide interactions in the recent hot weather we’ve been having. Drought-stressed weeds have a tendency to produce more protective cuticle, so additional carrier or surfactant is often needed to get herbicide active ingredient penetration into the plant. Anthony Hanson gave updates on insect issues occurring in mid-June, such as true armyworm and alfalfa weevil.

Anthony Hanson: morning everyone, welcome to today's strategic farming feel notes program and we're glad you could join us for today's session.

Anthony Hanson: So today we'll be covering coordinate origin and nutrient status and spring herbicides and hot temperatures for a bit of a split episode session today.

Anthony Hanson: So these sessions are brought to you by University of Minnesota extension, as well as very generous support from the Minnesota so I’ve been researching promotion console.

Anthony Hanson: As well as the Minnesota corn growers and research emotions Council I’m Anthony Hanson regional extension educator and integrated pest management for field crops.

Anthony Hanson: And we'll also have Dave Nikolai regional extension educator basically the University of Minnesota extension as well hosting today's session.

Anthony Hanson: So today we're also welcoming quite a few different speakers today, first we have Bbrad Carlson as well as Dan Kaiser with University of Minnesota looking at water and nutrients specialties and then we have Joe Ikley extension weed specialist from North Dakota State University.

Anthony Hanson: And with that I think i'll turn it over to Dave and see what you want to cover for the nutrient side of things today.

David A Nicolai: All right, thank you very much Anthony one go to our one of our first guests Brad Carlson a Co worker of ours that works out of the main Kato.

David A Nicolai: Regional office, but in a lot of water quality issues job in the past drainage, but, most recently, dealing with nitrogen management and application.

David A Nicolai: authors and promotes the nitrogen smart program across the state of Minnesota in conjunction with the Minnesota corn growers.

David A Nicolai: So brad we've had an interesting spring here coming up, things were a little bit later than people anticipated.

David A Nicolai: how's our next region status right now going through the spring, as far as Minnesota and obviously there's differences from north to south and maybe you can talk about those as well.

Brad Carlson: In general, I think it looks pretty good I really not seeing signs of a lot of deficiency I think everybody's well aware of what happened with nitrogen price.

Brad Carlson: That caused some changes in the application patterns, I guess, if you will, as far as I know, some parts of the State put on a lot more fall and.

Brad Carlson: Then they may be previously had from a proportion wise and then I think, in addition to that, there was general concerns.

Brad Carlson: From a lot of producers, regarding the potential for for product availability later on the trend over the last five six plus years has been to see a lot more side dress.

Brad Carlson: You know split applications, but it seems like this year, there was a lot less of that and I think a lot of that was just simply related to farmers, having concerns that when they get to that that.

Brad Carlson: Side dress time or right now that potentially the product wouldn't be available, and so I haven't seen nearly as many rigs out in the field.

Brad Carlson: As I have, over the last several years doing top dress side dress you know in in general, there was a lot of questions on account of how wet it was the spring, of course, last year was a pretty dry year.

Brad Carlson: With a lot of that end being put on in the fall, there were questions about did we lose a lot of nitrogen, we really didn't see a lot of evidence that that was likely to have happen.

Brad Carlson: Maybe in some cases where there's some wider soils for sure there was a chance that we might have leached some of that out, but it's.

Brad Carlson: worth noting, and one of the things that we talked about a lot when we do our nitrogen smart Program.

Brad Carlson: That Dean identification, the loss of nitrogen to the atmosphere is one of the major loss pathways in our heavier textures soils.

Brad Carlson: In South central Minnesota southern Minnesota really all the way across and that process is biological and therefore it's also temperature dependent and so.

Brad Carlson: Even though was wet early you know pre planting and we had delayed planting.

Brad Carlson: The souls were quite cold still at that point in time, and so from that standpoint didn't seem likely that we probably lost a lot of entity united vacation early.

Brad Carlson: This is really right now the time of year, where we would be at a lot more risk so that and, of course, over the last couple weeks we've not had.

Brad Carlson: quite so much precept where I’m at in particular and South central Minnesota was seca man Kato area we're actually starting to see some leaf curling on the corn.

Brad Carlson: signs of a of a tick of water stress, I know that Western Minnesota central Minnesota has had more adequate precipitation.

Brad Carlson: But probably not overly abundant if you are in a localized area that had some real downpours and you've got some padding and flooding.

Brad Carlson: It is possible that you will see some significant D notification going forward.

Brad Carlson: As you know, we what we see is are the some of the the research on that shows that if the subtle when the soil temperatures about 80 degrees, which it possibly is now that we've had a couple days that have gone to 100.

Brad Carlson: That that saturated soils lose about half their nitrogen in about 10 days but staying saturated for 10 days is also not a common occurrence.

Brad Carlson: But that can happen in the low spots in the field, and so I guess from there, you know, then farmers got to decide how big is that areas that worth going back into, you know as far as the guys, who are planning to do.

Brad Carlson: Who are planning to do still some side dress or top dress I think at this point it's getting a late enough you, you should know how you're going to put that on whether you're going to have a commercially applied.

Brad Carlson: For instance, with a spin spreader over the top, or if somebody's going to come in, or your your software going to come in and dribble Banda to use wide drops or something of that sort.

Brad Carlson: So from that standpoint, I think those decisions, probably are set.

Brad Carlson: Similarly, the light textures soils the the guys who irrigate you know that's always been a recommendation to use multiple splits.

Brad Carlson: And, in those cases I think most of those producers pretty well know what they're going to do.

Brad Carlson: I guess just a couple of tips to remember everybody's been talking about how extraordinarily windy it's been the last year or so that if you're putting.

Brad Carlson: The nitrogen on with spin spreader and it's pretty windy you can get some really strange application patterns that can cause problems in the field.

Brad Carlson: So, try and stay away from those days and we're getting 2530 mile an hour wind gusts that could cause a lot of issues The other thing is there was some research done at yc Jeff fetch did regarding.

Brad Carlson: Just comparing a single band dribble ban to why drop nozzles and I think the key takeaway was that they had.

Brad Carlson: A little bit of yield loss that they felt primarily was because the hoses that they were dragging were kind of wandering around the rows.

Brad Carlson: And and causing inconsistent application, and so you know that, too, if if you're using a dribble band where you're dragging a hose and particularly if you're maybe driving fast.

Brad Carlson: Make sure that the hoses aren't going places where you don't want them to I think the last thing that I want to talk about regarding some of this is using your ace inhibitors We recommend that if you're putting on.

Brad Carlson: urea that that we would like to see at least about a quarter of an inch rain within four days, and of course lately, the last week or so we haven't necessarily been able to count on that.

Brad Carlson: In general, the Uri ace inhibitors the patents gone off, though, as the prices come down a lot and that's become fairly standard practice anyway.

Brad Carlson: But I think it's probably a good investment, given the the weather patterns and I see looking out here at the the one week forecast and we've got a couple days with 50% 60% chance.

Brad Carlson: Does that mean that if you package them all together at some point we're going to get rain well I hope so, because we could use it, but I don't think that's a guarantee, so I think using a your ace inhibitor.

Brad Carlson: Particularly on your area is really as a good investment and then, in addition to that, we have seen instances where there's also been a small yield increase using a Uri ace inhibitor with us.

Brad Carlson: Because remember half of that product is Yuri also and especially if it, you know in if we're getting a case where.

Brad Carlson: it's getting hot and so forth, you know that that is going to react in the soil it's not the Uri as part the conversion to urea may not necessarily be temperature dependent, but then, if we end up blowing it off into the atmosphere later is your area or as.

Brad Carlson: Ammonia that that can be a tick temperature dependent, I think the key though with the UN.

Brad Carlson: And why we say we get slight increases of yield is I think it's more of a does it doesn't it and so it's really more of a case of is the situation right where you needed it.

Brad Carlson: versus you didn't need it at all it's not like just some small percentage it's either one or the other, and so that's also worth considering if you're able to get your ace inhibitor on your UN.

David A Nicolai: Alright, well, thank you very much brad for that for that update our other guest Dr Dan Kaiser with the university Minnesota extension and.

David A Nicolai: soils Dan you want to comment.

David A Nicolai: And we can come back and circle back a little bit more about nitrogen, we have a question or two but.

David A Nicolai: I want to get any if there's any observations that you might have on other crop nutrients things that people need to keep watching, for we have some concerns obviously about sulfur from time to time.

David A Nicolai: Maybe conventional that about worry are on potassium although it's more of a recommendation situation, but other things that you would be scouting for are trying to get it and get a handle on this this spring now we're moving into summer officially.

Daniel Kaiser: just looking at the plots we've had many been thing i've seen widespread has been sulfur deficiency.

Daniel Kaiser: I was actually out looking at some of my sulfur and potassium trials, you know, one of my corn trials on a little bit drier piece of ground.

Daniel Kaiser: Pretty low salt has value so obviously seeing some issues there but software it'd be the one that.

Daniel Kaiser: I didn't expect to see as much of a problem this spring, but it's one of them that we've had to treat a little bit more so let's just kind of brush up on the difference between sulfur deficiency and.

Daniel Kaiser: Some of these other nutrients some if we do get dry would suspect to see some marginal areas that are marginal potassium maybe start to show up.

Daniel Kaiser: With some deficiencies just kind of keep an eye on that, so it seems like potassium is kind of one of the ones that the nutrients that gets.

Daniel Kaiser: forgotten about us slightly when we start getting these high fertilizer prices, it seems to be nitrogen that we know we get a higher return on that is a primary focus and then always phosphorus which.

Daniel Kaiser: fosters is probably the easier when the cut and some of the soils just because the soil test generally works pretty well for it so.

Daniel Kaiser: that's just something I keep out an eye out for if you've got anything so i'll test in that 150 to 200 range South central Southwest was central Minnesota just keep an eye on it, we get dry, we might start seeing some potassium deficiency show up and some of the marginal areas.

David A Nicolai: Well, one crop we don't often talk about is alfalfa you know we spend a lot of time on corn and soybeans anything on a nutrient standpoint or our applications that we should consider or this summer, this fall and alfalfa.

Daniel Kaiser: It just depends on the solstice value is I mean I can't speak maybe we've done enough work on potassium I mean we've had a few crop news articles on that if you kind of want to dig back into that I mean I was seeing.

Daniel Kaiser: we've got some sulfur trials out in some areas that we haven't had solved around for a few years have been showing pretty well, I mean we just took our first cut off of that, and it was.

Daniel Kaiser: Probably close to about half a ton difference between the width and without treatments on some of the sulfur trials Murray applied after first cut so we'll kind of see moving forward, but I can still see the.

Daniel Kaiser: The plots out there within without so it's one of the things that you know does show up in there and it's one of the things if you're looking at alfalfa.

Daniel Kaiser: mean it's it's if you're starting to see some yellowing or the this Stan looks a little thin it could be sulfur I mean sulfur and potassium kind of.

Daniel Kaiser: Can mimic each other, a little bit, although you know striking differences, if you start getting real strong potassium deficiencies in your alfalfa you should be able to tell that from sulfur if you've got a pretty severe deficiency.

David A Nicolai: With a couple of minutes we got left in this segment that maybe i'm just going to throw off questions that both Dan and brad here that we've gotten from folks.

David A Nicolai: This this last week, one of them was in regards to the pre plant nitrogen tests, what did we see in terms of the the p P amp T tests across the stage and did we really have that much carry over.

David A Nicolai: Next, and credits from from last year and and finally real quickly that the next vacation, particularly in a flooded, you know red river valley in the in the north.

David A Nicolai: In there, so I kind of there's three questions i'm grouping together, but if you guys want to hit on those real quick, that would be great.

Brad Carlson: Well, I I kind of went through and summarize some of the p P amp T data, some of the commercial labs provided us with some of their.

Brad Carlson: test results, and we did see a fair amount of of carry over nitrogen now.

Brad Carlson: The thing that I think we have to remember and I didn't get results from spring tests that were taken, I guess, from a timely standpoint was by the time we got those that would be a little late to do much with them.

Brad Carlson: But from the fall ones, there was a fair amount nothing you have to keep in mind is is most of those samples were taken in circumstances where we expected there to be otherwise you wouldn't have taken a test there.

Brad Carlson: But in cases where we thought there could be a nitrogen carry over there was There certainly are a lot of other places where there could be remember that that particularly where we had have.

Brad Carlson: file corn following corn where there could have been unused nitrogen from the previous year, as well as fields that have a long term dinner history, those are the places we might have expected that.

Brad Carlson: Also it's been a little bit more of a trend lately to get into the pre side dress nitrate test the season, one I guess the reminder if you're using that.

Brad Carlson: we're not necessarily saying it doesn't work but it's been difficult to calibrate the test because particularly.

Brad Carlson: Depending on how you already if you already applied say half of your nitrogen and you're wondering how much more to put on.

Brad Carlson: Did you get a consistent application is that nitrogen all converted to nitrate because remember the test only test for nitrate.

Brad Carlson: If you apply it and hydrogen united in did you take a sample in between, where the Nice went and is it all nitrate at the time you took the test and so forth.

Brad Carlson: As well as in corn on corn situations, particularly there can be issues with the Immobilising nitrogen from the residue meaning is there, but you didn't pick it up in the test.

Brad Carlson: You know so from that standpoint we've kind of backed off on making any kind of test recommendations with the psn T.

Brad Carlson: But I will state does have some of that and I know we've been kind of foggy and particularly he's been looking more specifically lately at.

Brad Carlson: trying to get some calibration and recommendations for that Minnesota, but at this point, we still just don't have good data that we can hang our hats on.

David A Nicolai: Dan any last thing comments you would have either on nitrogen or something else here as.

Daniel Kaiser: I was brad was.

Daniel Kaiser: talking earlier just remember with the notification that it's it's temperature dependent, so you know that question about the red river valley being flooded if it was cold enough it's it's not likely that we didn't actually tried everything I mean you may have lost up to.

Daniel Kaiser: You know 510 percent brad probably not maybe even less than that then really right, this time of year is when the risk is a lot higher so that's one of the things looking at that.

Daniel Kaiser: Just with that primary question i've been getting the spring has been switching to urea spin on instead of some of the other sources.

Daniel Kaiser: big worry from some of the growers has been damage and how much to put on we've put on.

Daniel Kaiser: Up to about 180 pounds of n as urea and they start seeing some damage Ola depends on the situation, I mean if you're looking at 101 hundred 220 units and probably not more cosmetic issues.

Daniel Kaiser: But I haven't seen anything that's going to be really too much of an issue with that, but as brad said.

Daniel Kaiser: Really, right now, if you can't count on rain, we need rain within about four days about a quarter inch.

Daniel Kaiser: To effectively incorporate the urea in one shot so that's where you want to start looking at some of the generic ag retain type products.

Daniel Kaiser: With that, just to make sure that you're not guessing off some of that was we're in a hot stage, right now, if there's moisture on the surface, that your research and dissolve you're going to see some DNA or some mobilization loss of that product.

Brad Carlson: And there are.

Brad Carlson: There are some people that have been interested in cultivating it in yes, that works if you have a cultivator and you want to do that and that could be a segue into your next guest to.

David A Nicolai: Alright, well, thank you very much, Dan and brad if folks have questions they can email you.

David A Nicolai: directly and we are recording this We appreciate that I know you guys have other things you've got to run to this morning I want to bring in I guess a Anthony our next guest Dr Joe I flee and if we can.

David A Nicolai: see if we can hook in with with with Joe Okay, at this point in time and Joe can you hear me.

Joe Ikley: Yes, can you hear me.

David A Nicolai: I can hear you I guess you are mobile today, probably in the highest point in the red river Valley.

David A Nicolai: Which is a I don't know if that 10 feet or 20 feet, but anyhow you're up on a on a rise, but.

David A Nicolai: Joe i've known for many years, he is a cross the river and he's our extension weed specialist for the state of North Dakota, and so we do a lot of things back and forth, including including.

David A Nicolai: We just wrote a crop news together here that was published in Minnesota yesterday I understand it's going to be version in North Dakota published but talking about.

David A Nicolai: temperatures and making our herbicide applications, particularly under above average temperatures and hot weather as things are moving along, so I guess Joe i'm.

David A Nicolai: Why would we even want to talk about this in terms of that what are some of the concerns and things that that you see that co operators need to be under watch for and think about here, and sometimes he's hot and windy conditions.

Joe Ikley: Well, so I think one of the reasons we want to talk about it so just interesting I saw a map of the US, the other day, and I believe.

Joe Ikley: down by you guys Minnesota was down by the twin cities, was the hottest area in the great plains, a couple days ago so that's maybe the why, of course, because we've been very hot.

Joe Ikley: And the other reason is a lot of folks remember last year when we had these hot conditions of course we're in a severe drought.

Joe Ikley: Most complaints we had last year were due to product performance issues and lack of weed control, so we hit him a hot stretch of weather and then folks start thinking about that again.

Joe Ikley: But I do want to contrast that for this year at least most of us, at least in in my state, we have plenty of moisture this year and so that's one difference.

Joe Ikley: And the other one is our wins this year tend to be more of a southeast wind versus the southwest wind.

Joe Ikley: And so what that typically means is the air masses, we are dealing with, or more humid as well, so very hot, yes, the same as last year, absolutely not and then that's fine what were some of the things we talked about in that article that we grow.

David A Nicolai: And we really didn't have the drought, per se, that we had a combination last year and in Europe you're doing it folks remember, but certainly these really.

David A Nicolai: Hot temperatures anything that we should talk about in terms of herbicide uptake from a weed standpoint, in terms of.

David A Nicolai: A cuticle build up and maybe we can explain that a little bit more, but in terms of have a shine down are we still going to be there are some things that we have to keep in mind on on week control.

Joe Ikley: You have so so again comparing weeds last year to this year, and so, if you have weeds and have been through some drought stress.

Joe Ikley: And, and we do have some weeds if we have some short term drought and there's roots aren't developed, they may have some drought stress built into them a little bit.

Joe Ikley: But when they're when they're going through dry weather and also hot weather, they tend to build a thicker cuticle.

Joe Ikley: And that's what makes it more difficult to control weeds in a drought and especially in hot conditions, so we need something to get to that cuticle whether that's more oil more carrier volume.

Joe Ikley: Usually oil is the easiest thing we can add to a tank to help dissolve that cuticle.

Joe Ikley: If you're in areas with adequate moisture and then also with relative or high relative humidity sees that.

Joe Ikley: The cuticles are going to be a little bit thinner because the plants just don't need to develop a thick cuticle to conserve moisture.

Joe Ikley: So that's the difference and drivers as well now, when we get in these hot conditions, whether we have moisture whether we don't have moisture the weeds will shut down during the heat of the day.

Joe Ikley: And then, so you can see that we've probably all saw it last couple days when we're upper 90s, and one hundreds of.

Joe Ikley: grasses though role, just like corn, I heard two mentions of corn leaves rolling in the last segment.

Joe Ikley: We grass weeds will do the same thing grass probably weeds will tend to droop other leaves a little bit just to kind of survive the heat of the day.

Joe Ikley: And so, that means a they're shutting down not actually growing during that heat of the day, within be that also means we can have some issues with a proper coverage and deposition just do that leaf architecture.

David A Nicolai: So really you got to look at that weather forecast because there's always some sometimes danger spraying at night or that type of thing temperature inversions and other things off target movement but.

David A Nicolai: what's your what's your feeling in terms of timing here if you can afford today would you would you wait, would you go out at night or depends upon the mode of action here.

Joe Ikley: yeah and so maybe a field by field decision like again based on your mode of action based on your lead stage, a number of things to consider there, but if I were to just kind of general general allies here.

Joe Ikley: i'd say if you can, or you have to spray during a hot day try to spray during the morning because the plants had all nights can fool off.

Joe Ikley: Free reset their canopy architecture and you have a window there in the morning, whether they will be actually growing and will be more sets book and created later that day.

Joe Ikley: will have a window in the evening, as well, but again, you mentioned temperature and versions and they tend to set in two to three hours before sunset.

Joe Ikley: And that's really that when the weeds are starting to cool off and come down become more susceptible, so there is a window in the evening, but it is a little bit tighter.

yeah.

David A Nicolai: I agree, I was talking to a grower yesterday, and he was going to go out, you know very early this morning and soybeans.

David A Nicolai: Just specifically for that reason he had that window and he felt he had a better opportunity and control in the morning hours.

Joe Ikley: yeah and then the other thing I was going to mention and maybe it's not as extreme further south Minnesota but.

Joe Ikley: You know we've had a couple hot days and the cool off in the next couple days for us will be in the mid 90s, and then we'll be in the mid 70s, this weekend.

Joe Ikley: And so, if you're in a position where you can wait a couple days wait it out that the heat wave pass, then that would probably be my recommendation.

Joe Ikley: Just to make sure that we you know we're not exposing ourselves to potentially too much crop injury, in these conditions, where we also have some very.

Joe Ikley: wet soils and then the hot conditions we, as I said, we control is better, but for those of with concerns to crop injury crop injury will be higher in the in the hot conditions as well.

David A Nicolai: Little just talk a little bit about that from a herbicide I think about blue fascinator our liberty here we're getting you know some of our we've set or well beyond four inches and certainly.

David A Nicolai: We won't be too long here in places in Minnesota and we're going to be our one and soybeans but there's a there's a finite limit here isn't there on some of these products.

David A Nicolai: You can maybe go with some of the other group 15 or 14 so a little bit later on, but I think those are things that we should.

David A Nicolai: be aware of, and obviously that kamba we have that cut off already on southern Minnesota we mentioned in the article, you can still do it northern Minnesota north of mine, I 94 and in North Dakota.

David A Nicolai: But in Minnesota we were concerned about that 85 degree temperature forecasts are shutting down as well, but I think North Dakota is still out like best management practices right Joe.

Joe Ikley: yeah that's correct so it's kind of you know, recommended if you can avoid springville baby five, please do so, but there's nothing for him a team that.

David A Nicolai: Right write an article about in northern Minnesota north of I 94 we do have that provides over here from the Minnesota department of X, so that that that's hard and fast.

David A Nicolai: With with 85 we had another question that came in and I don't know I mean maybe this is back a while ago, but one from the grower said, you know what is there a pros and cons about dual versus did you have in soybean production you've had some experience with with both.

David A Nicolai: Dual being a much older products that you've been obviously a newer product on the market, maybe more efficacious on on certain types of broadly as any any feeling there one way or the other, Joe.

Joe Ikley: yeah so the two weeds that I tend to think of when comparing those products digital is going to perform better on pig weeds than dual will.

Joe Ikley: So that that's pretty consistent that is assuming, of course, adequate moisture for activation schedule does require at least a half an inch for for best activation.

Joe Ikley: So it's the the least water soluble of those group 15 herbicides, but if you get good activation it's really still shine on the pig weeds.

Joe Ikley: Where do I do think will outperform residual is for those of us that deal with panic come species of grasses.

Joe Ikley: So they're they're both pretty equivalent on the fox tales and some other grasses but.

Joe Ikley: For pan come species and up here we're really more wild frozen millet, but I think down your geography Dave you probably deal with fall panic i'm a lot more and dual does tend to be a better bit better product and digital on fall panic them in other panic of species.

David A Nicolai: we're not as far as an iowa we get the wild pros on millet the World Cup grass and, of course, the foxtails you know situation with that and emergence any last words about.

David A Nicolai: Cut off dates for crops weed size or anything else that that we should be paying attention to, I mean there's there's a limit.

David A Nicolai: With that we've got concerned about products like FLEX star applied too late and carrying over into next year that that's the residual situation but anything else about crops safety here and variability and we'd height out there.

Joe Ikley: yeah, so I think just focusing on crops, you know i'm here in the field staring at corn, that is 1216 inches and so of course at 12 inches that's our cutoff for Atrazine.

Joe Ikley: 11 inches is our cutoff for seated clore containing products, and so we are starting to lose some some available options just based on corn heightened growth stage and corn.

Joe Ikley: And then soybeans, as you mentioned, since yesterday was the solstice we're going to start thinking about flowering the first kind of popular product that we that we lose.

David A Nicolai: I think we match enjoy your.

David A Nicolai: Your singles changing a little bit there, but I think they're going to go to.

David A Nicolai: Go to the last night.

yeah.

David A Nicolai: There and.

David A Nicolai: In terms of that.

David A Nicolai: I don't know Joe can you hear me.

David A Nicolai: You may have.

David A Nicolai: made it all three different spot.

David A Nicolai: Well, not lost them Dave.

David A Nicolai: You may come back, but Anthony I think those are the main things that we wanted to cover from a weed science standpoint.

David A Nicolai: Do you want to talk briefly about.

David A Nicolai: Some of the other aspects, and I know there's comments that Bruce potter your coworker made here lately.

David A Nicolai: Recently, about army worm etc, but you want to give some highlights about that, since we are in a field notes program something else that we should be watching for this week and grasshoppers That was the other thing.

Anthony Hanson: Okay yeah we do have a few insect updates coming in, you mentioned Bruce potter he's been putting the word out on true army or.

Anthony Hanson: Now, especially if you had a ride cover crop or any grasses nearby your fields that have been terminated or mode.

Anthony Hanson: that's a high risk for true army or marvi to moving into your field and your crops us so keep an eye out for those there have been some fields.

Anthony Hanson: Can anecdotal reports but I think we had one report from guided about hundred 25 acres and he said, the whole field was pretty much cleared off so that.

Anthony Hanson: is a concern they came in about maybe three weeks ago, the MAS they'd lay their eggs and larvae have been developing so that's one thing to keep an eye out for.

Anthony Hanson: We also have alfalfa weevil the seasons wrapping up for that or should be, remember that they have a single generation per year, and once the larvae are done developing.

Anthony Hanson: they're not causing any more damage, so there are a lot of folks out there that are getting.

Anthony Hanson: You know, maybe jump the gun a little bit on the insecticide use right now, but be sure to check the thresholds be out there and scout just having.

Anthony Hanson: Barbie out there does not mean you need to spray, especially if you're going to be going soon.

Anthony Hanson: And remember your pre harvest intervals for those ones too, because a lot of times they're around you know seven days or so, and if you're going to be born within a week anyways.

Anthony Hanson: A lot of times it's better just a little bit earlier so that's one word we have some fields where I am we were at threshold for morning but just stuck with morning and haven't had issues since, so I keep that in mind, because we may be worried about pyrethroids resistance.

Do you want.

David A Nicolai: last word about grasshoppers.

Anthony Hanson: Yet grasshoppers is the last one, in that case, are they like the dryer whether i've been seeing some earlier season grasshoppers show some fields.

Anthony Hanson: There have been some reports of people ranking for me even but.

Anthony Hanson: Do be sure to check the threshold information on university Minnesota website for those two because.

Anthony Hanson: There is a process can go through for scouting for those, whether by sweet net or trying to gauge how many grasshoppers seeds per square foot walking around to, but it should be pretty early for soy beans, but they can tolerate some damage disruption damage on their grasshoppers.

Anthony Hanson: day I think there's some questions coming in, oh Joe was just one comment, he is like dropped off because he was this is real time.

David A Nicolai: webinar he was out in the field, and probably got a little bit farther from the one of the local towers, but anyhow.

David A Nicolai: He just wanted to mention again and glue fascinating the liberty to cut off is to our one but enlist products, you are allowed through our one.

David A Nicolai: Okay, so keep that in mind, you still have an opportunity, and I know a lot of people are still able to do that, but keep in mind the wind.

David A Nicolai: Drift and concerns off target well with all of these products, particularly horticulture products grapes and other things in the in the area.

David A Nicolai: Whatever we can do to mitigate that and to eliminate that and you might have to choose the right date nozzles droplet size etc drift control products, etc, so with those.

David A Nicolai: Your I mentioned anything else, we want to thank Joe for coming in in hanging in there and doing it on a cell phone in that high spot and the red river valley so appreciate that anything else Anthony at this point.

Anthony Hanson: I think that'll mostly covered a little early for so, if anything, it might you might be seeing it on some plants but hot dry weather.

Anthony Hanson: might be a little tough on it, too, so let's keep an eye on that one for now, but nothing much to report there.

Anthony Hanson: Otherwise Dave thanks again, I think we will call it a morning here so again, thank you for everyone, for attending strategic farming field notes.

Anthony Hanson: Just a reminder, when you do exit the session there is a very short for question survey and that helped us out a lot if you can give us feedback and today's session.

Anthony Hanson: And also another thing.

David A Nicolai: I say we'll be back again on the 29th next week.

Anthony Hanson: yep exactly and again, thanks to our sponsors Minnesota sleeping growers and the Minister for the corn growers and yet again June 29 at 8am will be back again next week so have a great rest of the day and Thank you everyone.

David A Nicolai: Thank you all, and thank you, Joe for hanging in there appreciate that and we'll be talking to you please go to the the crop news for a lot of these timely articles on on weeds insects diseases and nutrients as well.

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