论文部分内容阅读
1、疫病为害症状:苗期染病:茎基部呈暗绿色水浸状软腐或猝倒,有的茎基部呈黑褐色,幼苗枯萎而死。果实染病:始于蒂部,初生暗绿色水浸状斑,迅速变褐软腐,湿度大时表面长出白色霉层,干燥后形成暗褐色僵果,残留在枝上。发生规律:病菌主要以卵孢子、厚垣孢子在病残体或土壤及种子上越冬,其中土壤中病残体带菌率高,是主要初侵染源。条件适宜时,越冬后的病菌经雨水飞溅或灌溉水
1, the disease symptoms: Seedling disease: the base of the stem was dark green-like soft rot or cataplexy, and some stem base was dark brown, seedlings withered and died. Fruit disease: began in the Ministry pedicle, newborn dark green flooding plaques, rapid brown soft rot, the surface humidity grow white mildew layer, dry dark brown fruit formation, remaining in the branches. The law: the main bacteria to oospores, chlamydospores in the sick or soil and seed winter overgrown, of which the disease in the soil with high rates of bacteria, is the main source of initial infection. When conditions are right, the bacteria after the winter splashed by rain or irrigation water