This Soybean Pest Podcast episode is packed with good stuff! Matt starts off by sharing some positive data from USDA-NASS from Iowa. A recent report showed 45,000 honey bee colonies in Iowa, a 275% increase from 2017. Also, the number of in-season losses is down from last year. Erin talks about a new soybean pest that is showing up in western Iowa. The soybean gall midge can be a devastating stem-boring pest. She summarizes her observations in a recent ICM News article. Erin also notes aphid activity in increasing throughout northern Iowa - in corn and soybean. It's a good time to scout fields to check for aphids. Also, there is a newly-revised field guide for soybean aphid. Find the pdf and hardcopy versions at the Extension Store. Lastly, PFI is hosting a field day on September 6 near Marble Rock. Erin will share some information about host plant resistance for soybean aphid. Click here for more details.
After a break, Matt and Erin get together for episode 3 in 2019. Erin mentioned a flash drought is expected this week if high temperatures continue throughout Iowa. This could have implications for pest management - slowing down soybean aphid but perhaps accelerating twospotted spider mite. Erin also highlights current pest activity in field crops, including corn rootworm and Japanese beetle. But they spent some time talking about the newest pest in Iowa, soybean gall midge. So many unanswered questions, but it appears this will be an economic soybean pest. Matt comes back to an older podcast episode where they reviewed the cancellation of sulfoxaflor insecticide. It was recently registered (again) by the EPA and will be labeled in soybean. This insecticide offers an alternative mode of action for soybean aphid. Finally, Matt brings up a F.I.T. that is about isopods.