Infectivity of a Pieris brassicae-derived Zoophthora radicans isolate and its new host-passage isolates against Plutella xylostella in relation to the phenoloxidase activity in the new host hemolymph after infection

• 大菜粉蝶根虫瘟霉菌株转染小菜蛾后侵染力变化及其与寄主血淋巴酚氧化酶活性的关系