Isolation and Fungicide Screening of Phytophthora capsici of Pepper in Laboratory

Through tissue isolation,pathogen of pepper blight in Zhangjiakou were isolated,cultured and morphological observation,and toxicity tests of seven fungicides to P.capsici Leonian were carried out using inhibiting mycelium growth rate in laboratory.The results showed that the isolate was identified as Phytophthora capsici Leonian,and the effect of 64% evil cream·mancozeb WP was the best with control effect of 71.38%,followed by Azoxystrobin·chlorothalonil suspending agent and 72% Cream urea·mancozeb WP with control effect 66.89% and 62.35% respectively,66.6% Propamocarb hydrochloride aqueous solution was the worst with control effect 22.67%.