Spotting is most prevalent on lower leaves but may occur on the stems as well. The tips of the leaves die. Branch blight, blight, and collar rot are names for the same disease. Symptoms are rotting of leaf bases. Ashy white spots occur on the leaves which may be constricted and twisted.
Fusarium wilt causes yellowing of new growth.
The plants are stunted. No chemical control is listed. This information is for educational purposes only. References to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned. This information becomes public property upon publication and may be printed verbatim with credit to MSU Extension.