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苹果从开花到套袋这段时间,是霉心病、轮纹烂果病、斑点落叶病等病菌侵入潜伏期,也是蚜虫、红蜘蛛、卷叶虫、食心虫、金纹细蛾等虫害的井发期;既是幼果细胞分裂盛期及果树对钙、硼等元素的吸收高峰期,也是幼果对环境气候、农药的敏感期。套袋时间早晚,对日灼果轻重、果形指数、产量增减、补钙防病效果、果实品质、采收期早晚等都有一定影响。所以苹果套袋早晚和套袋前的管理措施,对套袋成败影响极大。
Apples from flowering to bagging this time is mildew heart disease rotten rot disease, spotted leaf disease and other pathogenic bacteria invasion latency, but also aphids, spider mites, leaf roller worms, moth worms, gold moth and other pests in the hair period ; Both young fruit cell division peak and fruit trees on the absorption of calcium, boron and other elements of the peak, but also young fruit on the environment, climate, pesticides sensitive period. Bagging time sooner or later, the weight of the sunburn fruit, fruit shape index, yield increase and decrease, calcium disease prevention and control, fruit quality, harvesting time sooner or later have a certain impact. Therefore, Apple bagging sooner or later and before bagging management measures, the success of bagging great influence.