Issue No. 20/August 11, 2006
Soybean Aphids Still Require Vigilance
Lower projected temperatures mean small densities of soybean aphids could develop into potentially threatening numbers. Continue scouting soybean fields diligently.
August can be a critical month for some insect species, so don't let your guard down too early.
Waterhemp--What Have We Learned About This Species?
Use of glyphosate on Illinois soybean acres has likely masked the full extent of PPO-resistant waterhemp. The most consistent control programs for waterhemp management include soil-applied and postemergence herbicides, along with mechanical cultivation where feasible.
If You Still Haven't Checked Fields, It May Be Time
Though the majority of the Illinois corn and soybean crops are currently rated good or excellent, visits to fields are still instructive.
Reports are provided this issue for northern and west-central Illinois.