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Drs. Matt O'Neal and Erin Hodgson are back with their weekly podcast regarding the soybean aphid and other insect pests of soybeans.  In this brief (~3min) episode we talk about the state of soybean aphids in Iowa and the midwest with a quick review of efforts to monitor aphid migration to soybeans. Please email us with your questions (oneal@iastate.edu or ewh@iastate.edu)

Dr. Hodgson and O'Neal talk about the preharvest intervals for those soybean growers considering an insecticide late in the season.

Drs. O'Neal and Hodgson summarize reports from around the midwest and Iowa about the soybean aphid. Despite the lack of aphids in the fall, evidence so far is that they survived and are beginning to build up in the northern parts of Iowa. Numbers are still very low and do not require insecticides, but we compare 2011 to previous growing season.

We discuss the likelihood that aphid outbreaks will occur and when to spray aphid populations. Some agri-businesses are suggesting that aphids be sprayed when populations are lower than 250 aphids per plant. We discuss the value of such lower thresholds, as well as ways to detect other invasive insect pests of soybeans.

Drs. Hodgson and O'Neal return with weekly updates on the insect pests attacking soybeans. This week we discuss the first reports of soybean aphids in Iowa, the growing risk for spider mite outbreaks, and an alarming change in the emergence of Japanese beetles.