Soybean Disease Update

Bob Mulrooney, Extension Plant Pathologist; bobmul@udel.edu

Soybean Cyst Nematodes
The first soybean cyst nematode sample came into the lab this week. Plants were stunted and in some patches dying. White and yellow females were very evident on the infested roots. High initial egg populations in the soil and droughty conditions soon after planting can result in these symptoms. Other problems can look like SCN. The only way to be sure is to look at the roots or take a soil sample that includes some plants as well.

 

SCN damage often shows up as random spots in the field.

 

Stunted and dying plants infested with SCN

Soybean Rust
A few more counties in Florida have been added to the map this week. Both finds were soybean rust infecting kudzu. The disease is still moving slowly down South. Be sure to keep up-to-date on the latest info by visiting www.sbrusa.net or http://sbr.ipmpipe.org

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