Fungicide and AMS Burn in Hot Days Peanut Notes No. 130 2020
What are your thoughts on spraying fungicides in the hot part of the day? Spreading ammonia sulfate in heat of day applying 125 to 150 lbs.
The key on AMS is for the leaves to dry so that it does not stick and moves to the soil. That is late morning and afternoon. I don’t think there is an issue spraying mid-day for fungicides.
I’ve applied fungicides on hot afternoons many times and it seems to be OK. On the other hand, I have come back to spray on another day if the plants were actually wilting. Older formulations of Provost might be suspect.
I sprayed a series of fungicide treatments at Whiteville in the heat of the day yesterday, and there was no type of leaf burn today (the folks on the station took a look a few hours ago.) It was really hot and humid. I applied Provost Silver and Abound alone and with sulfur (Microthiol.) I also had Miravis plus either Convoy or Elatus and Apogee plus UAN and they did not see any leaf burn.