The first leaves of muskmelons (cv.Yindi) were treated with BTH and challenge inoculation with powdery mildew, POD and CHT activities and lignin accumulation of second leaves were determined.

• 摘要通过BTH、BTH+挑战接种白粉菌分别处理银帝甜瓜幼苗第一片真叶，测定未处理的第三片真叶的POD、CHT活性及木质素积累。