Soybean Aphids – What is the Threshold Again?

It has been a few years for some since they have had to worry about soybean aphids, let alone make a spray decision. So I want to cover off the key points you need to know through some of the repeat questions that have been coming in. Anyone with more questions after reading this, please ask in the comment sections so we can all continue the discussion there.

Q1. With soybeans at $15, does that threshold change? Answer: No. The economic threshold of “250 aphids per plant and increasing on 80% of the plants in the field during R1-R5?, already takes into consideration a wide range of soybean prices. The actual economic injury level (where the cost of control is equal to the damage they are causing) is around 660 aphids per plant. So you have a large buffer area between the threshold and the economic injury level to determine if a spray is needed. SEE THE REST OF THE POST

 

Shaun Haney

Shaun Haney is the founder of RealAgriculture.com. He creates content regularly and hosts RealAg Radio on Rural Radio 147 every weekday at 4:30 PM est. @shaunhaney

Trending

Wheat prices jump into August — This week in the grain markets

This week, winter wheat prices touched a three-year high, but it didn’t last. Chicago SRW wheat prices for September 2018 gained 5 per cent or about 26 cents US/bushel to close at $5.56. While the December 2018 contract was up 5.4 percent — or nearly 30 cents — to finish a tad under $5.80. In…Read more »

Related

Leave a Reply

 

This site uses Akismet to reduce spam. Learn how your comment data is processed.