Soybean Pest Podcast

Despite a slow start to planting, some insects are starting to respond to emerging soybeans.

In this episode Erin and Matt kick off the 13th season on the 13th of June with a brief discussion of the spiders on Stranger Things before getting into soybean pest activity. Erin reviews predictions about bean leaf beetle winter mortality and subsequent activity on spring emerging soybeans.  Erin also reviews her groups work tracking several lepidopteran pests (that’s a bunch of moth species that feed as caterpillars on corn and soybeans).  Matt notes that it’s not just soybeans that these hungry beetles are feeding on.

For more details about the overwintering survival of bean leaf beetles- https://crops.extension.iastate.edu/cropnews/2022/04/another-tough-winter-bean-leaf-beetle

Erin and her technician Ashley Dean have developed a pest alert system. Visit this website for more details- https://pestalerts.extension.iastate.edu/.

If you are looking for an interesting event about pollinators, visit ISU’s Pollinator Fest on 25 June at Rieman Gardens, just south of the Jack Trice stadium.

Despite a slow start to planting, some insects are starting to respond to emerging soybeans.

In this episode Erin and Matt kick off the 13th season on the 13th of June with a brief discussion of the spiders on Stranger Things before getting into soybean pest activity. Erin reviews predictions about bean leaf beetle winter mortality and subsequent activity on spring emerging soybeans.  Erin also reviews her groups work tracking several lepidopteran pests (that’s a bunch of moth species that feed as caterpillars on corn and soybeans).  Matt notes that it’s not just soybeans that these hungry beetles are feeding on.

For more details about the overwintering survival of bean leaf beetles- https://crops.extension.iastate.edu/cropnews/2022/04/another-tough-winter-bean-leaf-beetle

Erin and her technician Ashley Dean have developed a pest alert system. Visit this website for more details- https://pestalerts.extension.iastate.edu/.

If you are looking for an interesting event about pollinators, visit ISU’s Pollinator Fest on 25 June at Rieman Gardens, just south of the Jack Trice stadium.

Erin and Matt welcome Ashley Dean to the podcast to talk about her work tracking and trapping insect pests of corn and soybeans in Iowa, and the breaking news that the EPA has banned chlorpyrifos.Ashley gives us an update on the low populations of soybean aphids, occurrences of spider mites and grasshoppers, and the slow spread of soybean gall midge into the more central part of Iowa.  She also shares her work on trapping corn rootworms and the discovery of a red western corn rootworm. We geek-out a bit about that one.We discuss the recent announcement that the EPA is reducing the tolerances for chlorpyrifos to zero for all foods.  This is a bigger deal than the announcement just over a year ago that Corteva would stop producing chlorpyrifos. Ashley Dean wrote an article about that decision in an article: Corteva to End Chlorpyrifos Production: What Does this Mean for Iowa Farmers?We discuss how the removal of chlorpyrifos will reduce the number of insecticides with different modes of action that corn and soybean farmers can use.  For details about modes of action, visit this website: https://irac-online.org/modes-of-action/.There are insecticides that can replace chlorpryifos, but they are more expensive.  For soybean aphids, there are also aphid-resistant varieties. Ashley wrote an article about the economic factors related to pest management and soybean production. She developed partial budgets for this article that goes into great detail about the costs of different approaches for managing the soybean aphid: https://onlinelibrary.wiley.com/doi/full/10.1002/ps.6093

Erin and Matt welcome Ashley Dean to the podcast to talk about her work tracking and trapping insect pests of corn and soybeans in Iowa, and the breaking news that the EPA has banned chlorpyrifos.

Ashley gives us an update on the low populations of soybean aphids, occurrences of spider mites and grasshoppers, and the slow spread of soybean gall midge into the more central part of Iowa.  She also shares her work on trapping corn rootworms and the discovery of a red western corn rootworm. We geek-out a bit about that one.

We discuss the recent announcement that the EPA is reducing the tolerances for chlorpyrifos to zero for all foods.  This is a bigger deal than the announcement just over a year ago that Corteva would stop producing chlorpyrifos. Ashley Dean wrote an article about that decision: https://crops.extension.iastate.edu/cropnews/2020/02/corteva%E2%84%A2-end-chlorpyrifos-production-what-does-mean-iowa-farmers

We discuss how the removal of chlorpyrifos will reduce the number of insecticides with different modes of action that corn and soybean farmers can use.  For details about modes of action, visit this website: https://irac-online.org/modes-of-action/.

There are insecticides that can replace chlorpryifos, but they are more expensive.  For soybean aphids, there are also aphid-resistant varieties. Ashley wrote an article about the economic factors related to pest management and soybean production. She developed partial budgets for this article that goes into great detail about the costs of different approaches for managing the soybean aphid: https://onlinelibrary.wiley.com/doi/full/10.1002/ps.6093

We got some rain in central Iowa , but it is still hot and dry. This is important for the pest that is the subject of today's Fun Insect Trivia (FIT). IN addition to that pest, Erin and I discuss the insect pests that are persisting into August.Erin runs down the list of insects that are active in corn and soybean fields- rootworms, Japanese beetles, gall midges and soybean aphids.Although rootworms are active and surprising some farmers in their abundance, Japanese beetles are appearing to be limited to field edges. Gall midges were found in western Iowa, but aphids are low to non-existent. Our last pest is the topic of todays FIT. Matt asks Erin a series of questions that include the pictures below, which are leaves damaged by this pest.  See if you can match Erins knowledge on this pest.We also discuss the upcoming fair season- check out Erin in the beer tent on August 14-15.We also discuss the latest edition of the Tenderloin trail. https://www.iowapork.org/popular-tenderloin-trail-2-0-version/Matt was also interviewed about the STRIPS project, including a discussion about the impact of CP43 for pollinator conservation:https://www.weareiowa.com/article/news/local/iowa-state-university-prairie-strips-project-farmland-benefits/524-84d4d05c-59cc-47c8-916d-16cf6c0dfd60 

We got some rain in central Iowa , but it is still hot and dry. This is important for the pest that is the subject of today's Fun Insect Trivia (FIT). IN addition to that pest, Erin and I discuss the insect pests that are persisting into August.

Erin runs down the list of insects that are active in corn and soybean fields- rootworms, Japanese beetles, gall midges and soybean aphids.

Although rootworms are active and surprising some farmers in their abundance, Japanese beetles are appearing to be limited to field edges. Gall midges were found in western Iowa, but aphids are low to non-existent. 

Our last pest is the topic of todays FIT. Matt asks Erin a series of questions that include the pictures below, which are leaves damaged by this pest.  See if you can match Erins knowledge on this pest.

 

We also discuss the upcoming fair season- check out Erin in the beer tent on August 14-15.

We also discuss the latest edition of the Tenderloin trail. https://www.iowapork.org/popular-tenderloin-trail-2-0-version/

Matt was also interviewed about the STRIPS project, including a discussion about the impact of CP43 for pollinator conservation:

https://www.weareiowa.com/article/news/local/iowa-state-university-prairie-strips-project-farmland-benefits/524-84d4d05c-59cc-47c8-916d-16cf6c0dfd60

Erin's back.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. Soybeanhttps://academic.oup.com/jipm/article/12/1/13/61752592.Soybean Gall Midge (Diptera: Cecidomyiidae), a New Species Causing Injury to Soybean in the United States https://academic.oup.com/jipm/article/12/1/8/61409003.Current Distribution and Population Persistence of Five Lepidopteran Pests in U.S. Soybeanhttps://academic.oup.com/jipm/article/12/1/11/61752574.Needs Assessment for Corn Insect Pest Management in Iowahttps://academic.oup.com/jipm/article/12/1/pmab021/6319925 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/

Erin's back.

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

https://academic.oup.com/jipm/article/12/1/13/6175259

2.Soybean Gall Midge (Diptera: Cecidomyiidae), a New Species Causing Injury to Soybean in the United States 

https://academic.oup.com/jipm/article/12/1/8/6140900

3.Current Distribution and Population Persistence of Five Lepidopteran Pests in U.S. Soybean

https://academic.oup.com/jipm/article/12/1/11/6175257

4.Needs Assessment for Corn Insect Pest Management in Iowa

https://academic.oup.com/jipm/article/12/1/pmab021/6319925

 

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/

This half pod is just Matt giving a few updates, a "thank you" to the Iowa Honey Producers Association and preparation for a Fun Insect Trivia (FIT) question for next week.Erin is out in the field today. She and I will return next week, Tuesday, to discuss what she is seeing in the field and the answer to the FIT.In the meantime, Matt wraps up the week of 12-16 July. One big observation is the occurence of soybean aphids at really low populations. One encouraging sign is the co-occurence of insect predators and mummies. The mummies are evidence that aphids have been parasitized by wasps.  Combined, these predators and parasitoid wasps may prevent outbreaks later in the summer.Matt gives a big thank you to the Iowa Honey Producers Association for the invite to speak at their field day last weekend. Ebert honey was the host, providing a great location to share our research on prairie strips.  The beekeepers were excited to learn more about this practice and how these patches could help improve honey bee productivity.Finally- Note the blurry picture below.  This picture was taken by a colleague working at a central Iowa research farm. Next week, I'll ask Erin what she thinks it is and what impact, if any, it could have on crops in Iowa.(Matt failed to add it in the original submission. It's added below.)

This half pod is just Matt giving a few updates, a "thank you" to the Iowa Honey Producers Association and preparation for a Fun Insect Trivia (FIT) question for next week.

Erin is out in the field today. She and I will return next week, Tuesday, to discuss what she is seeing in the field and the answer to the FIT.

In the meantime, Matt wraps up the week of 12-16 July. One big observation is the occurence of soybean aphids at really low populations. One encouraging sign is the co-occurence of insect predators and mummies. The mummies are evidence that aphids have been parasitized by wasps.  Combined, these predators and parasitoid wasps may prevent outbreaks later in the summer.

Matt gives a big thank you to the Iowa Honey Producers Association for the invite to speak at their field day last weekend. Ebert honey was the host, providing a great location to share our research on prairie strips.  The beekeepers were excited to learn more about this practice and how these patches could help improve honey bee productivity.

Finally- Note the blurry picture below.  This picture was taken by a colleague working at a central Iowa research farm. Next week, I'll ask Erin what she thinks it is and what impact, if any, it could have on crops in Iowa.

(Matt failed to add it in the original submission. Its added below.)