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在研究西双版纳橡胶树疫霉(Phyt-ophthora de Bary)的过程中,看到所鉴定的四个疫霉种对橡胶树的致病力不同:柑桔褐腐疫霉(P.citrophthora),辣椒疫霉(P.capsici)致病力强而棕榈疫霉(P.palmivora)、恶疫霉(P.cactorum)较弱。这和用不同的方法采集疫霉,获得的种的比例不同有着密切的关系,用以橡胶材料作钓饵的方法,弱致病种的得率低;用直接分离法,则得率提高(余永年等,1986年)。研究不同疫霉种的致病力,对研究疫霉的生物学特性和病害防治有一定意义。本试验对上述四种疫霉作致病力的测定和比较。
In studying Phyt-ophthora de Bary, the pathogenicity of the four identified P. infestans strains on the rubber tree was observed: P. citrophila, P. capsici, P. capsici was more virulent and P. palivivora and P. cactorum were weaker. This is different from the method used to collect Phytophthora, the proportion of different species is closely related to the use of rubber as a bait method, the rate of weak pathogenic species is low; with direct separation, the yield is increased (more than Yongnian et al., 1986). Studying the virulence of different Phytophthora species has certain significance for studying the biological characteristics and disease prevention and control of Phytophthora. The test on the four Phytophthora for determination of pathogenicity and comparison.