Drs. Matt O'Neal and Erin Hodgson discuss current soybean aphid activity around Iowa and the region. Numbers are remaining low with some regions declining in density. They also discuss upcoming field tours (available at www.aep.iastate.edu).
Hot weather isn't favorable for soybean aphid, so numbers are still down. But spider mites and other pests thrive in these conditions.
Dr. O'Neal returns from vacation to discuss with Dr. Hodgson reports of aphid outbreaks in Iowa. The doctors have an upcoming field day on August 28th in Sutherland Iowa, Sponsored by PFI. For details visit http://www.practicalfarmers.org/assets/vcalendar/index.php.
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 are back for the 3rd year of the soybean aphid podcast. We review the status of aphids on buckthorn, introduce a new buckthorn project (buckthornwatch.org) and talk about the new invasive pest of soybeans, the brown marmorated stink bug, that has been found in Iowa.
Soybean aphids have been found on soybeans. We discuss what this might mean for management. We also report on yet another invasive insect pest of soybeans that has been found in the US, the kudzu bug.
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 share reports of aphid outbreaks in soybeans in MN. Numbers are up in Iowa. Also, have you noticed big, metallic green beetles? Japanese beetles are out in Iowa.
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.
Soybean aphid populations reach threshold in Iowa and japanese beetles are becoming an increasing problem for both soybean and corn. In this episode we discuss both of these pests and the need to scout now to determine the need for an insecticide. To learn more about Japanese beetles see Dr. Hodgson's latest article in the Integrated Crop Management newsletter (http://www.extension.iastate.edu/CropNews/2011/0722hodgson.htm).