STEM CANKER
Description:
Stem canker begins as a reddish-brown lesion on the leaf scar after the petiole
on the stem has fallen. The lesion enlarges rapidly forming a slightly sunken,
reddish-brown to black girdling canker. The stem above the canker generally
dies.
Location: Stem canker
can occur anywhere in Ohio.
Time of infection:
Lower leaves may be affected early in the season, but girdling occurs after
mid-season such that dead plants can be found in August.
Management:
· Resistant varieties
· Crop rotation
Corn,
Soybean, Wheat, and Alfalfa Field GuideBulletin 827