Soybean Pest Podcast

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

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.

Erin Hodgson talks about recent aphid populations and also some interesting defoliators in soybean. 

Soybean aphids are picking up activity throughout Iowa; however, populations are still very patchy. Also consider other defoliators in soybean right now that might compound stress during pod set. 

Winged aphids are still on the move in Iowa, although most fields still remain well below treatment levels. Neighboring states have notable aphids, so scouting should still continue. 

Aphids are still hard to find, but that doesn't mean that Matt and Erin can't find something to talk about. We discuss spraying insecticides based on a calendar date as opposed to spraying insecticide based on need (i.e. aphids populations above a threshold).

Still very few aphids in the soybean fields of Iowa. Drs. O'Neal and Hodgson give an update and discuss the likelihood of a soybean aphid outbreak later this summer. Also, Dr. Hodgson gives us an update of events where she will discuss recent research and new tools for pest management in soybeans.

Drs. O'Neal and Hodgson give a quick update on the status of soybean aphid populations in Iowa. They also review the other insect pests that may be out this time of year feeding on soybean leaves.

In this episode Drs. O'Neal and Hodgson discuss the low populations of soybean aphids in Iowa. Dr. Hodgson highlights upcoming meetings and workshops to learn more about soybean production and pest management.

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. Mary Gardiner, assistant professor at the Ohio State University, visited ISU and gave a seminar about her research on the ladybeetles.   Ladybeetles can play a positive role by feeding on pest like the soybean aphid.  Mary's research is focused on the exotic multi-colored asian ladybeetle. This species is a voracious predator of soybean aphids, but is also a pest in our homes and to grape growers.  Mary is documenting the role landscape plays in the establishment of this species as part of her Buckeye Lady Beetle Blitz.  To learn more about Mary's work visit http://ladybeetles.osu.edu/default.asp 

Matt O'Neal talks with Amy Asmus of Asmus Farm Supply to discuss outbreaks of aphids in cornfields around north-central Iowa.  The two discuss what species of aphids are in corn and what impact they may have. Be prepared for more questions than answers as the scientist and crop consultant compare notes about this problem. For a more complete description of the aphids see Dr. Erin Hodgson's article in the Integrated Crop Management Newsletter (www.extension.iastate.edu/CropNews/2009/0807hodgson.htm)

Its mid-August and soybean aphids are starting to look white and small (yes, even smaller). Do they count? Are aphid populations still increasing? Why? Erin and Matt answer these questions and more. Have a question about aphids or other insect pests?  Visit www.soybeanaphid.info and post a question.  

Erin and Matt discuss the recent increase in aphid populations including winged aphids that are moving from field to field.  We discuss what growers should consider when applying insecticide to soybeans when seeds are developing. We summarize a recent Integrated Crop Management newsletter articles on late season management of soybean aphids. For more information visit www.extension.iastate.edu/CropNews/2009/0813hodgsononeal2.htm

Erin and Matt report on observations on aphid populations around Iowa from the week of August 3-7.  We discuss the continued production of winged aphids, their capture in the suction trap network (visit it at www.ncipm.org/traps/), and the changing appearance of aphids in the field (winged, wingless and white dwarves).  If you have questions, please post them at www.soybeanaphid.info.

For the past 5 years, we have evaluated insecticides for managing soybean aphids. The most recent report can be found at our website www.soybeanaphid.info. After applying insecticides as part of our 2009 insecticide evaluation, Erin and I discuss some issues to consider when selecting an insecticide

In this extra podcast, Matt O'Neal discusses a recent change to the Iowa bee rule with Betsy Buffington. Betsy works for The Pesticide Applicator Training Program at Iowa State University. She has created a publication about the bee rule, which can be found at the Iowa State University Extension publication office as PAT 47. Visit https://www.extension.iastate.edu/store/ for more information.

For the week of August 3, 2009, Drs. Hodgson and O'Neal discuss scouting reports from the previous week indicating increases in aphid populations.   In our longest podcast to date we discuss several issues growers should consider with regard to spraying insecticide for soybean aphids, including the potential for spider mite outbreaks.

For the week of July 27, 2009, Drs. Erin Hodgson and Matt O'Neal review reports and data on soybean aphid populations from Iowa and the midwest. Although large populations can be found, many growers are reporting low populations with less than 50% of the plants infested with aphids. Also, Erin discusses reports of soybean defoliation by insect pests that are not aphids.

For the week of July 20, 2009, Drs. Erin Hodgson and Matt O'Neal discuss the state of aphid populations in Iowa.  Aphids are now well established in many fields but at low populations.  We discuss factors that can contribute to the likelihood of an outbreak.  Also, Erin and Matt make a joke about aphid perspiration.