Today in this podcast, Matt and Erin talk about a new publication summarizing insecticide evaluations for soybean aphid. The Yellow Book for soybean aphid starting in 2005 in response to a growing demand to manage this invasive pest. Matt was up for the challenge and passed the torch to Erin in 2009. Now the evaluations are at 2 ISU Research Farms and include 25+ treatments annually. You can access all the Yellow Books FREE on their lab website: http://www.ent.iastate.edu/soybeanresearch/content/extension.
Today, Matt and Erin talk about noteworthy news items related to field crop pest management. But first, they talk about upcoming meetings they plan to attend. Both are attending the ICE (International Congress of Entomology) meeting in Orlando next week. And both plan on speaking at the annual ISU Integrated Crop Management Conference in Ames (Nov 29 - Dec 1). Erin will talk about a management plan for soybean aphid, particularly with suspected pyrethroid resistance in Iowa. Matt plans to talk about pollinators in field crops. In Minnesota, the governor proposes restrictions on neonicotinoids in agriculture and the implications for that are largely not understood. Also, the recent merger discussions between Bayer Crop Science and Monsanto also could change the ag industry in the U.S. and around the world.
In this episode, Matt and Erin talk about managing twospotted spider mites in soybean. Considering other pests is important, given the non-target effects with an application. This is particularly true if soybean aphid is in the field because of recent reports of pyrethroid resistance. They discuss options, including using miticides to suppress mite populations. Implications of pest ecology and economics plays a part in managing soybean pests.
Twospotted spider mites. Photo by Frank Peairs; www.ipmimages.org.
It's been a few weeks, but Matt and Erin have a new episode out today! Erin starts off by providing a statewide update on soybean pest populations in August. Good news is that most fields had low pest pressure in 2018. Matt shares his impressions of a recent court ruling that will ban chlorpyrifos use in the U.S. The episode title is a play off of Warren Zevon's song, "Lawyers, Guns and Money" from 1978.
The use of insecticides to control the soybean aphid has become a predominant management practice for growers. Before the confirmation of the soybean aphid in 2000, less than 0.1% of soybean was treated with insecticides. However, soybean aphid management has resulted in a 130-fold increase of insecticide applications in less than a decade. An estimated 1,400% increase of Iowa soybean acres were treated with a foliar insecticide in 2009 compared to 2000. Growers are also increasing the use of insecticidal seed treatments to control early-season establishment of insects on soybean. Read more about Insecticide Evaluations