Buckwheat black spot

Symptoms mainly affect the leaves. The lesions are brown and have rosy patterns. This disease sometimes invades with Cercospora fagopyri, causing brown spots with rims around the brown spot. The northeastern China occurred in September and is visible south of the Yangtze River in June.

The pathogen Alternaria tenuis Nees called Alternaria spp.

The morphological characteristics, transmission routes, and disease conditions of the germs, and methods of prevention and treatment were shown in the black spot disease of maize.