Home Indiana Agriculture News Check for Spider Mites in those Dry Indiana Bean Fields

Check for Spider Mites in those Dry Indiana Bean Fields



A wide variety of conditions during 2018 has led to a wide variety of soybean fields across Indiana. Recent rains have benefited soybean fields that received the moisture, but the rains were spotty. In the coming weeks rains will continue spotty but temperatures have moderated. Hoosier Ag Today chief meteorologist Ryan Martin says the moderation will continue into August, and agronomist Kirsten Thomas-Garriott is happy the crops are getting a break.

“I’m really excited for this cooling off period I’ll call it, based on the temperatures that we’ve had up to this point,” she said. “The last month or so has been several degrees above normal. We’ve been accumulating more GDU’s than normal so far this year, and that’s really stressful particularly on our corn crop, maybe a little more so than our soybeans. So, we really, really welcome a little bit of a cooling off period as well as more frequent rains.”

Because of the spotty nature of rainfall in the Hoosier state, some areas are dry and getting drier. In the new pest and crop update from Purdue, spider mites were identified as a possible cause of yellowing soybeans. Thomas-Garriott concurs with their advice to scout for spider mites.

“I love how they simplified it in that article that came out on Friday. So, just simply take a piece of white paper out to the field with you and shake your plants over the paper and see what you get. With spider mites they’re going to be tiny little specs and thrips are going to be more elongated and about twice the size. That’s a really good, simple thing that growers can do to identify what might be out in their fields and if they might be at threshold, particularly on the field edges where we didn’t receive much rain. I would say an inch or less is where you’re really looking for the problem.”

Frogeye is a disease that is popping up in eastern Indiana, and if you’ve hit the threshold a fungicide application is in order. Thomas-Garriott, a DEKALB Asgrow Technical Agronomist, talks more about that in the HAT interview:Kirsten-Thomas-Garriott-soybean-update