番荔枝枯果病及其防治

Custardapple fruit blight and its control

番荔枝枯果病主要危害果实 ,造成果实干腐僵硬 ,发病株率 1 0 0 %。病原为豆荚大茎点菌Macrophoma mame Hara.,病菌以菌丝体、分生孢子和孢子器在树上僵果中越冬 ,高湿对病菌侵入、发展、流行有利。及时摘除僵果 ,幼果初期喷洒 70 %甲基托布津 wp750倍或 75%百菌清 50

Custardapple fruit blight damaged mainly the fruits of custardapples and caused the dry rot and stiffness,the infecting percentage was 100% per plant.The pathogen was fungus Macrophoma mame Hara and overwintered as mycelium,spore and pycnidium in mummies on the trees.The high moisture was benefit to infection,development,spidemic.Spraying 70% Thiophanate methyl wp(750 times)or 75% Chlorothalonil wp(500 times)in early young fruit period could control the disease.