Okay you sprayer experts

Last year I sprayed Sonic and Roundup pre emerge on beans. Bicep and Roundup pre emerge on corn. Then post sprayed Atrazine and Roundup on corn and just roundup on 400 acres of beans to end the year.

When I put away the sprayer for the year I triple rinsed the sprayer with water then put a little RV anti freeze in the pump and hoses to store it for the winter.

This spring I rinsed out the RV antifreeze with water. Loaded Bicep and Roundup, and sprayed my first field of corn before it emerged.

When I started I blew the water out in the corner of the field and took off across the field.

3 weeks later I got a strip of dead corn the width of the boom about 100 yards into the field for about 100 feet long. The corn came up and grew to 3" tall then died.

What chemical could possibly caused this to happen? I have been rinsing and starting like this for 30 years.

The strange part is I sprayed about 200 acres that first day and all the other acres look great.The sprayer set for about 2 days and when I went to spraying again the first field of the day has the exact same thing. 100 yards of good corn no weeds the 100 feet of dead corn. The next 150 acres look fine.

None of those herbicides used the year before will kill corn if sprayed before it emerges like I did. The last thing sprayed last year was Roundup, that will not kill non emerged crops or weeds. I did plant RR corn also.

I have beans with volunteer corn that the Sonic did not kill this year so I don't think Sonic will kill pre emerged corn.

I, my agronomist, nor anyone else I asked can figure it out. What am I missing?

Gary

It sounds like the Bicep settling out to me. The Bicep has atrazine in it and atrazine at high rates will kill corn. I would check and see if you are getting good agitation in your sprayer. When your sprayer set for those few days did it have spray in it or was it empty???

I will bet that you will have that dead spot for all things for a few years. My neighbor forgot to open his agitation valve while mixing two years ago. So when he took off spraying he sprayed most of the chemicals in the first few feet. There is still a bare spot there.

I aint no expert but i know if you spray like flax you have to clean your rig with a nutsralizer (spelling) of some sort as the cem. rezadue will kill it,,,,rencing does NOT clean the cemical out of your sprayer,,,my emails open,,,il call ya if you like,,,hope this helps

Did the same thing. I forgot to agitate and killed everything for a few years for a few hundred feet because that area got over-dosed.

Agitation valve was set properly. I add my chemicals through an induction cone that sets next to my water supply tank. After I first put in a little water the chemicals are run in along with water at the same time.

So they are mixed right away with water and continue to mix while I finish filling the tank.

It sat empty between the first day of spraying and the second time I used it.

I don't know???

Gary

I have used Neutrasol in the past. Don't remember if I used it at the end of the season last year or not.

I always have it on hand, to use between switching from corn spray to bean spray.

Gary

Cant go wrong with a good mystery. I'm sure you can rule out the round up and the atrazine. No chance they did it. That leaves bicep, and I cant picture that at all and the sonic which seems so uprobable that it is crazy to suggest it.
So my guess is its the sonic. What is its chemistry? We used to have trouble with Canopy/Authority hanging on in the sprayer and doing enough other wierd things that we quit using it. Find the chem rep for sonic and bend his ear a little. Back when I had trouble with the canopy and authority it got to the point I would drive to the back corner of the field away from the road to start. Didnt fix anything but nobody could see the dinged up corn from the road! Let us know what you figure out.
bill

Yes I have killed beans post spraying when following corn post spraying as well.

Always from a banvel or canopy type chemical.

I know exactly what you are talking about starting on the back side of the field. This strip this year in the corn is right by the road for God and everyone else to see.

I added a rinse tank to my sprayer just for that reason. When I do the last field of post corn I transfer plain water into the main tank and flush out the tank and booms 2 to 3 times before I leave that last field of corn.

I haven't killed any beans since adding that flush tank 3 or 4 years ago.

Gary

I have a 40 acre fild visible from all angles ,, hate it when i get a skip or don;t get it PERFECT ,, they all like to rib me about it LOL .. out of ignorance , i wreked too many fields in my time , and have learned , now I take about 20 gallons to the field with me on last trip, stop before losing prime , addd a couple jugs of wter, then spry down til nearly lose prime , add water , this time rinse insides of tank , then spray down again . repeat at LEAST 3 times total then finish with ammonia solution, rinseing sides and pump down ,.. i don;t have stat eof the art modern equipment , i am certain you techy guys have a better plan than mine ,. and wouldlike to hear from you ...

I know I been out of the farming game few years but you said you sprayed round up before corn emerged. i take you aleady grasses a nd broadleafs up and growing? been some of thaat happening around here but on bigger scale and it has been RR trait in seed corn has not actually been RR seed. looks like stripped fieldin some case green and white then just green and brown. I know of one major seed company end of day sweeps seed off bagging area and bags it back up with last run of day with whatever happen to be last run. some of this stuff is mixed bags looks like. Only reason I mention ths is i have 4 buddies who work that area at the plant,an have said it many times. they don't think it right but do what told to keep jobs. i sure don't miss the overhead of farming. good luck

that was my guess,didnt agitate well.

You've got yourself a real mystery here. According to what you've stated, you did everything right.....only you know "something" screwed up. As I understand it, the first 100 yards of corn that got sprayed are fine, but then for the "next" 100 ft, it killed everything the width of the boom. I would have thought the the "First" 100 ft of corn would have died had you had an agitation problem. It's just a guess, but did your Bicep have some clumps (or thick gel) in it that would not have readily dissolved? This could have been floating around in the tank initially and then got sucked down into the pump thus causing the OD situation. Problem is, now you'll probably never find the cause.