Spraying and rain question. - The Combine Forum
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post #1 of 11 (permalink) Old 07-06-2019, 08:49 PM Thread Starter
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Spraying and rain question.

I sprayed some Axiel Extreme ipak on barley today and then it rained about 10-15mm in a thunderstorm. I started spraying at 1:30pm and finished around 3:00pm. It rained around 4:30–5:00pm. The rainfast time says 1 hr but im concerned it was a waste of time and money because it rained hard. Is there going to have been enough time between the chemical application and the rain? What do you think?

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post #2 of 11 (permalink) Old 07-06-2019, 09:04 PM
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Usually can 1/2 the recommended rainfast on chemicals I find. Have left the field and it rained 1/2" in 20min as I was driving home with the sprayer and the chemical still worked.

Partners and Licensed to kill like this.
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post #3 of 11 (permalink) Old 07-06-2019, 09:08 PM
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Your fine. I had the same thing this year. Same chem. Was raining as i folded up.
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post #4 of 11 (permalink) Old 07-06-2019, 09:12 PM Thread Starter
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Thanks for the replies guys. Really been a frustrating field. Cutworms ate flax off so sprayed it out and resowed barley. Then it rained and its up nice but lots of weeds and it is expensive stuff to spray so was feeling sick about wasting 29 bucks and acre.
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post #5 of 11 (permalink) Old 07-06-2019, 09:51 PM
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It probly be OK...one time I sprayed velocity on wheat and it was far away so I didn't want to quit and it was one of those years where it was raining every other day...it started to sprinkle on my last tank about half way through, so I figured **** it will be a good expiriment. After a while you could see where some pigweed survived right at the end and it was already wet enough to make your shoes wet in the grass...If it is listed as 1 hour rainfast I wouldn't even worry about it.
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post #6 of 11 (permalink) Old 07-06-2019, 11:06 PM
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Alot depends on how thirsty the weeds are. If they are water logged or wet leaves already you need the time. If they are dry and sun is shining you will be fine withless time. I had one customer a few years ago insisting I spray axial even after pointing at the sky and showing the radar. An hour into the spray job the sky opened up. The axial that had half an hour was fine, the rest did not work. Since you had an hour on it you will be fine.

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post #7 of 11 (permalink) Old 07-07-2019, 12:01 AM Thread Starter
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Plants were dry and sun was shining when I was spraying. We have had a lot of rain in the last 4 weeks and I am very grateful for it. It has been dry in the last week or so though so field wasn't water logged.

Thanks again everyone for the advice.
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post #8 of 11 (permalink) Old 07-07-2019, 12:31 AM
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youll be just fine. Try spraying your garden with roundup and take a garden hose to it immediately. Guarantee its all dead! Especially if you use a good nonionic surfactant with it.
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post #9 of 11 (permalink) Old 07-07-2019, 01:07 PM
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We sprayed liberty couple weeks ago, while we were spraying we got surprised by a heavy rain shower. Liberty worked just fine..., even in spots that got sprayed 5 seconds before it started to rain really hard on it...just like chaddermd says.


A week later I had the same happening while spraying MCPA..., same story, worked just fine.
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post #10 of 11 (permalink) Old 07-07-2019, 01:48 PM
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Have sprayed glyphosate in a light sprinkle had a great kill. Worst is usually when it's too dry the delta T sucks and everything evaporates off before it can absorb.

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