梨黑星病又叫梨疮痂病,是梨的主要病害,其发病程度与树势强弱、栽培管理方式,果园卫生状况等密切相关。近年由于病原菌产生抗药性,一旦气候适合常造成大流行。为了有效控制它的蔓延,除了萌芽前后掰除病芽,喷代森铵400倍液铲除病源外,夏季化学防治尤为重要。 1.多雨大流行年份 麦收前后各喷1次1:2.5:240波尔多液,以后每隔 Pear scab is also known as pear scab disease, pear is the main disease, its incidence and strength of trees, cultivation and management, orchard health status is closely related. In recent years, due to the emergence of drug-resistant pathogens, once the climate is often caused by a pandemic. In order to effectively control its spread, in addition to breaking apart before and after bud disease buds, spraying ammonium sulphide 400 times the eradication pathogen, the summer chemical control is particularly important. 1. Rainy pandemic year before and after the wheat harvest each spray 1: 2.5: 240 Bordeaux mixture, after every interval