First report of Neocosmospora striata causing peanut pod rot in China.
In 2008, an outbreak of pod rot of groundnut occurred on most of the cultivars in the Old Yellow River drainage area, the largest groundnut-growing region in China. Disease incidence reached as high as 90% in some fields, causing severe yield losses. The black rot of pods and blackened, non-rotting taproots was similar to symptoms of peanut black rot caused by Cylindrocladium parasiticum, but the reddish orange perithecia of C. parasiticum were not found on the taproot close to the surface of the soil. The foliage of affected plants was generally asymptomatic, but some plants turned greener. This pod rot disease was further investigated in 2008 and 2010. The causal organism was identified as Neocosmospora striata based on morphological, genetic (ITS) and pathogenicity tests. This is thought to be the first report of N. striata causing groundnut pod rot in China and the first description of the anamorph of the fungus.