Aug 1, 2014
Home| Tools| Events| Blogs| Discussions Sign UpLogin


Ask an Agronomist

RSS By: Farm Journal Agronomists, Farm Journal

Have your agronomic questions answered by a Farm Journal agronomist. E-mail us directly at TestPlots@FarmJournal.com, and we’ll respond on this blog to provide an interactive dialogue.

Speed Up The Scouting Process For Soybean Aphids

Jul 22, 2010
Question: A week ago (July 15) I hadn’t seen any soybean aphids. This past Monday, it was like they had exploded in one of my fields, so now I’m starting to check my other soybean fields. It’s slow going, help!
 
Answer: Sounds like you’re out scouting fields, which is the best thing you can do to stay on top of soybean aphid pressure between now and mid-August. The economic threshold for aphids is 250 aphids per plant. We use this threshold up until the later reproductive stages, around R4. Some research we’ve seen indicates there could be an economic benefit using this threshold through R5. You can use a simple speed counting process to determine whether you’ve reached threshold levels—it doesn’t have to take a ton of time and is certainly well worth your effort. The protocol for this process was developed by researchers at the University of Minnesota. For more information on the procedure, go to:
http://www.soybeans.umn.edu/crop/insects/aphid/aphid.htm

 
This blog is provided as an interactive way for you to have your questions answered by our Farm Journal Agronomists. E-mail your nitrogen, soil fertility, soil density, planter set up, scouting, and other questions to TestPlots@FarmJournal.com.
Log In or Sign Up to comment

COMMENTS (1 Comments)

Anonymous
WHAT TO DO ABOUT THISTLE WORMS
10:17 AM Jul 26th
 
 
 
 
The Home Page of Agriculture
© 2014 Farm Journal, Inc. All Rights Reserved|Web site design and development by AmericanEagle.com|Site Map|Privacy Policy|Terms & Conditions