A Pathogenicity of Anthracnose Fungus, Colletotrichum capsici on Various Thai Chilli Varieties

Abstract

Fourteen isolates of C. capsici which isolates from various places were characterized into four groups based on morphological characters and growth rate. The fungi and cotyledon of five chilli varieties namely Man Dum, Chee Fah, Mae Ping, Khee Nhu and Luang were tested for their disease interactions. The results revealed that these isolates could be differentiated in pathogenicity. “Mae Ping” variety expressed a largest area of necrotic symptom compared to other four chilli varieties when inoculated with most of Colletotrichum capsici isolates. The result suggested that chilli variety “Mae Ping” was the most susceptible variety to all isolates of C. capsici. The other four varieties, Man Dum, Chee Fah, Khee Nhu, and Luang showed tiny (or small) area of necrotic symptom.