Aphid populations continue to increase in Iowa. We discuss their trajectory and when/if insecticides will be needed. Also, new publications from Iowa State University are available for the soybean aphid and the brown marmorated stink bug. To purchase the id guide for stink bugs or the new soybean aphid field guide visit the ISU extension publication store (www.extension.iastate.edu/store). To learn where the brown marmorated stink bug is in Iowa visit www.ncipmpipe.org.
(S3:E8) Pull the trigger?
(S3:E7) Tora tora tora
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).
(S3:E6) When to spray for aphids
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.
(S3:E5) Aphid populations increase! No lie.
(S3:E4) Soybean aphids remain at low levels
(S3:E3) Aphids establish a foothold
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.
(S3:E2) Soybean aphids found on soybeans
(S3:E1) First soybean aphid podcast of 2011!
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.
(S2:E10) Preharvest intervals and insecticides
(S2:E9) Soybean aphids populations increasing? Really?
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.