Crops and pests
Soybeans are in late vegetative stages and early reproductive stages. Cleanup herbicide applications went out this past week, as did some white mold preventative fungicides. Hot temperatures contributed to higher instances of soybean response to post herbicides, but soybeans are very resilient, and in most cases, the damage is only cosmetic and not expected to affect yield. As flowering approaches or has started, glufosinate can be applied until R1, and glyphosate can be applied through R2. Fungicides to prevent white mold should be applied between R1 and R3, with data showing higher efficacy when applied closer to R1.
Corn is on average between V8 and V10. Nitrogen continued to go out, and other field activities included herbicide application and rogueing of earlier planted seed corn. European corn borer (ECB) was found in non-traited corn in St. Joseph County. Scout for it in vulnerable corn varieties by checking for feeding damage, frass and larvae in the whorl. Tar spot was recently confirmed in four more northern Indiana counties, but data shows that the best timing for a single fungicide application is still between VT and R3-4.
Most winter wheat is at Feekes 11.2, where the kernel is at a soft dough stage and can be easily divided with a thumbnail. As wheat ripens, decisions on what to plant afterward must be made. For those thinking of following wheat with soybeans, the article Considering double-crop soybeans after a winter cereal this year? addresses irrigation, planting, profitability and soybean management decisions to consider for double-cropping. For those thinking of following wheat with a cover crop, the Midwest Cover Crops Council has a cover crop recipe for planting after wheat going into corn or soybean, and the fact sheet Cover crop tolerance to winter wheat herbicides has helpful charts for cover crop sensitivity to common wheat herbicides.
Source : msu.edu