Issue No. 9, Article 5/June 4, 2010
Corn Rootworm Larval Hatch Underway in Champaign County
On the morning of Thursday, June 3, Joe Spencer, an entomologist with the Illinois Natural History Survey, confirmed the presence of corn rootworm larvae in his plots north of Urbana. Most of the grubs appeared to be in the second instar stage of development, which suggests that adult emergence could be under way in two weeks, particularly with warm weather. Corn rootworm larvae pass through three larval instars. The corn rootworm "season" has begun. I look forward to receiving your reports this summer regarding the performance of various rootworm products.
Corn rootworm larvae collected from plots north of Urbana, Illinois, June 3, 2010 (Photo: Courtesy of Joe Spencer, Illinois Natural History Survey).