Preliminary Study on Inoculation Method of Rice False Smut and Its Effect
ZHANG Jun-cheng 1; ZHANG Bing-xin 1; CHEN Zhi-yi 2; LIU Yong-feng 2; LU Fan 2
（ 1 Department of Plant Protection; College of Agriculture and Biotechnology; Zhejiang University; Hangzhou 310029; China; 2 Plant Protection Institute; Jiangsu Academy of Agricultural Sciences; Nangjing 210014; China）;
Artificial inoculation of Ustilaginoidea virens (Cooke.) Tak. cultured in vitro was made by injecting at nightfall during booting stage of rice . The mixture of hyphae broken and conidia of the pathogen could cause serious disease of false smut. The maximum percentage of infected panicle(PIP) was 100 %, the maximum number of spore balls(NSB) of a panicle was 106, and the maximum disease index(DI) was 85.5. Disease severities caused by different strains, and disease severities of different rice materials caused by the pathogen were different; and there was obvious correlationship between DI and PIP, and between DI and average NSB of a panicle. It seemed that there existed specific interaction between strain and variety.