Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Colletotrichum truncatum causing anthracnose of begonia in China.

Abstract

In March 2017, diseased begonia plants (Begonia × semperflorens) from a greenhouse in Taigu, Shanxi province of China, showed anthracnose symptoms including large, sunken, brown lesions with numerous black acervuli on stems. Leaves were also infected. Foliar symptoms first appeared at the leaf margin. Infected leaves developed brown lesions with acervuli, and the entire leaf could become blighted as the lesions coalesced. Severe infection usually resulted in the death of plants. The disease affected ∼80% of the begonia plants in that greenhouse. Based on cultural and morphological characteristics, molecular data (sequence analysis of the rDNA internal transcribed spacer, glyceraldehyde-3-phosphate dehydrogenase and β-tubulin regions) and pathogenicity tests, the causal agent was identified as Colletotrichum truncatum. This fungus causes economically important anthracnose diseases and has a broad host range, including many leguminous and solanaceous plants. This is thought to be the first report of C. truncatum affecting begonia in China.