In this mid-June episode, Matt and Erin start off by summarizing current soybean aphid activity around the state of Iowa. Populations are showing up over much of northern Iowa the last two weeks. Some fields have approached infestations ranging from 10-50%, although the density per plant remains low. Under ideal conditions, these populations could exceed the economic threshold in a few weeks. Brian Lang also found an aphid mummy, which is also early compared to most summers. Erin talked about a new publication for European corn borer that is available at the ISU Extension Bookstore. The 12-page pub reviews identification, life cycle, plant damage, scouting and treatment recommendations for this devastating pest. In their new segment, Matt talks semantics about how to spell one of the most widely recognized insects in the world.
It seems like a long time since the last episode and that's because it was! Matt and Erin are back to talk about pest updates in Iowa. Drought stress throughout much of the state has been ideal for twospotted spider mite. Erin reports Some injury has been observed in corn and soybean this summer. Treatments are going on now throughout some southern Iowa counties. In addition, soybean aphid continues to be an erratic pest. Some populations are building up in northern Iowa counties, but most fields are not reaching the economic threshold in July. Matt elaborates about high numbers of Japanese beetle and they talk about the use of pheromone traps as a management tool. Finally, Matt talks about a new Science research paper that has inconsistent data on the effect of neonicotinoid seed treatments on wild and managed bees in Europe.
Matt and Erin took a short podcasting break but are back to summarize late season soybean pest activity. Erin talks about a slight resurgence of soybean aphid populations in northern Iowa. Read more about treating at full seed set in a recent ICM Blog. Erin also recommends scouting in late August/early September for second-generation bean leaf beetles, as feeding injury to pods and seeds could be significant. Matt has noticed perhaps early field senescence in some commercial fields in Iowa. He also took a trip to Mississippi to see soybean production and learn more about pollinator protection. This podcast also features a F.I.T.!
The 4th of July weekend delayed Matt posting this podcast.
We talk about pests: corn rootworms, japanese beetles, and soybean aphdis. The dry weather is making people worried about two-spotted spider mites, so we talk a bit about that.
Matt gives shares a "Fun (?) Insect Trivia" question about the conservation reserve practice described as "Pollinator Habitat" or CP42. Some new analysis of where CP42 is located in Iowa is the source of this question.
We talk a bit about how and where this conservation practice is placed in Iowa farm land.
For more information about CP42, visit https://www.fsa.usda.gov/Internet/FSA_File/cp42_habitat.pdf
ON this episode we talk soybean aphids (so few), soybean gall midge (they are active agian), redheaded flea beetle (not really a pest, but common in some parts of Iowa) and on ogoing research.
Erin shares with us a might haul of articles she just published in the Journal of Integrated Pest Management. Check this links for her work on some key pests, including one on the soybean gall midge (is it new to science? read and find out).
1.Identification and Biology of Common Caterpillars in U.S. Soybean
Finally, we discuss the FIT from last week. Check out the photo and hear Erin nail it!
Read more about the insect that was the topic of this FIT here: https://beetlesinthebush.com/2013/11/29/t-g-i-flyday-soybean-nodule-fly/