306 Berg Agricultural Hall
Agronomy, Horticulture & Plant Science-2207A
Brookings, SD 57007
Eric supports the citizens of South Dakota as an Assistant Professor and SDSU Extension Weed Management Specialist at the South Dakota State University campus in Brookings.
Many sunflower fields across the state are far enough along in their development that the window for preventing weeds with residual herbicides has passed. Weed escapes that remain in the field through the remainder of the growing season can contribute seed back to the soil seedbank.
The summer solstice roughly marks the date when soybean plants switch from vegetative growth to reproductive growth. An important aspect of the reproductive growth stage is that many herbicides can no longer be applied after plants reach any bloom stage.
Common banter at the farm gate implies farmers work long days to get the job finished. However, weed management may improve if spraying stops at a particular time of day.
