日本甜柿炭疽病发生规律及防治技术

近年来在浙江衢县林场日本甜柿苗木和大树上发生了严重的炭疽病。该病使苗木和柿树枝条大量枯死，落花落果严重，影响了苗木和柿果和产量和质量，该病于４月下旬至５月初开始发生，一直到果实采收期，病害的发生与气温，湿度，降水量和雨日有关。降水量大，雨日长，发病严重，高温干旱天气不利于病害发生。在病害发生期使用等量式波尔多液１００倍液、７５％百菌清１０００倍液及５０％代森锰锌６００倍液，有明显的防治效果，防治效

Epidemic factors and control techniques of Japanese sweet kaki persimmon anthracnose

In recent years,the nursery stocks and trees of Japanese sweet kaki persimmon have been seriously damaged by anthracnose at Quxian Forest Farm of Quxian County,Zhejiang Province The disease leads to stocks and twigs withered,blossom and fruit drop added, quantity and quality of stocks and fruit cut down The disease starts to occur during late April to early May,lasting for mature period of fruits Its incidence rate is related to air temperature,humidity,precipitation and rainy days Heavy rainfall and long rainy days causes serious infection On the contrary,high air temperature and low humidity do not During periods of infection,control could be made by spraying tree crowns and stocks with 100 fold solution of bordeaux mixture,1 000 fold chlorthalonil 75 wp and 600 fold mancozeb 50wp,resulting in efficiency of 89 3%,83 4% and 85 7% respectively