Philip supports the citizens of South Dakota in his role as the SDSU Extension IPM Coordinator based at the South Dakota State University campus in Brookings.
Philip Rozeboom
SDSU Extension IPM Coordinator
Also by Philip Rozeboom
Several Species of Caterpillars Are Actively Defoliating Soybean
There are several species of caterpillars that have recently been observed in a single soybean field. The species include the green cloverworm, cabbage looper, alfalfa, thistle, and oblique banded leaf roller caterpillars.
West Nile Virus Update: July 29, 2026
As of July 30, 2026, the South Dakota Department of Health indicated that West Nile Virus positive mosquito pools have been detected in Brown, Codington, Hughes, Lincoln, and Minnehaha counties in South Dakota.
Aphid Populations Observed in South Dakota Corn Fields
During the last week, we have observed low level aphid populations in corn fields. Although aphid populations can reach high densities in corn, their presence doesn’t indicate guaranteed yield loss.