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| Located in Central IL. We are looking at fall spraying for the first time, I have been doing some research and it seems there are two schools of thought. That is an actual fall burndown (possibly with a residual for a few weeks if spraying early) and a fall spray that will focus on the residual for early next spring when winter annuals are germinating. The issue to me seems that you cannot do an effective burndown and residual for spring because the burndown requires warmer weather to get an effective kill and the spring residual requires spraying while it is cold before freeze up. So my question is, what are guys actually doing? I looked around today and saw some very small henbit emerging but the 10 day forecast averages highs around 55 degrees with lows in the 40s, so I am not sure a burndown would be effective. That said if I were to do a burndown, Valor seems to be cheap enough to add to the mix anyways.
My other question is will a residual such as Valor actually last until the next flush of winter annuals germinate in the spring? I know this depends on the winter here. If it does, are guys skipping a pre-plant/pre-emerge pass in the spring and just planning on one early post past with a group 15? I figured we would still need a pre pass even with a fall spray pass but then do you run another group 14 twice or is that too much. I was thinking a group 14, Metribuzen and ...? for the first pass in the spring, saving the group 15 (likely Zidua) for the early post pass, at least in soybeans.
In a corn/soybean rotation (15 CEC, 5.5-6.5pH), main target for early spring is Henbit followed by pigweed.
I have many other questions as I am new to spraying myself but I figured I better start somewhere. Thanks.
Edited by 5GenFarms 10/24/2025 00:56
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Fall Burndown VS Fall Residual
