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天敌是果园害虫的主要控制者,保护和利用好天敌是开展绿色防控的前提和基础。一、天敌作用1、有效控制害虫的种群数量,维持果园生态平衡。2、减少农药使用,提高果品安全性,降低环境污染。3、兼治农作物、林木、蔬菜的害虫。二、果园天敌的保护和利用1、改善天敌生存环境(1)保护天敌越冬。休眠期刮树皮是消灭越冬病虫害的有效措施,但是小花蝽、捕食螨、食螨瓢虫等好多天敌也在树皮裂缝或树穴里越冬。为
Natural enemies are the main controllers of orchard pests and the protection and utilization of good natural enemies are the preconditions and foundations for green prevention and control. First, the role of natural enemies 1, the effective control of insect populations, the number of orchards to maintain ecological balance. 2, reduce the use of pesticides, improve fruit safety, reduce environmental pollution. 3, and run crops, trees, vegetables pests. Second, the protection and use of natural enemies orchards 1, to improve the living environment of natural enemies (1) protect the natural enemies of the winter. Scraping bark during dormancy is an effective measure to eliminate overwintering pests and diseases. However, many natural enemies such as smallpox, predatory mites and ladybugs are overwintering in bark cracks or tree trunks. for