Alfalfa weevil activity began early this year in Oklahoma and it appears that degree day accumulation for alfalfa weevils is well ahead of normal for most areas in Kansas. Alfalfa weevil degree days are a great way to estimate insect activity in the field and serve as a useful tool to know when to time scouting. Learn more in this article.
Western corn rootworm resistance to Bt corn continues to be an issue in continuous corn in the United States. Evaluating corn roots for rootworm damage during the growing season is highly recommended. Eggs should begin hatching after approximately 380-degree days have accumulated. Learn more in this article.
In an eUpdate article last month, we examined the counts of 90-degree days across Kansas this summer. However, a recent stretch of hot weather has nearly erased the negative departure for the first three weeks of July. This article summarizes the month of July in terms of temperature and stress degree days.