Bean Binoculars Incident

Soybeans at the V7 (seventh trifoliate) growth stage were observed displaying chlorotic and necrotic tissue on many leaves. Leaves were spotty gray to brown in coloration. There was no leaf cupping observed, nor were there any dead plants found. Injury symptoms were observed across the entire field. The grower reported a herbicide application that contained the active ingredients 2,4-D choline, glyphosate, lactofen, clethodim, and crop oil concentrate. 

The injury observed is consistent with the products applied to the field. Observe new growth for injury - the new growth in this field does not display any injury symptoms. Be aware of what herbicide injury may be expected with products being used and ALWAYS follow the label directions, especially in regard to soil type, air temperature, drought status, relative humidity, seed traits, and other stressors. Light injury most likely will not lower yield, but it may stunt growth allowing for weeds to emerge while canopy cover is reestablished. You can read more about identifying common herbicide injury symptoms in soybeans in this article from Iowa State Extension, and in this article from the University of Minnesota Extension.