葡萄果穗套袋是生产无公害葡萄的关键技术。生产实践表明 ,葡萄套袋后 ,可明显减少病虫危害 ,减少用药次数和农药污染。一般情况下 ,套袋葡萄烂粒率在 1 %以下 ,而不套袋者烂粒率在 2 0 %以上 ,严重者可全穗烂掉。特别是一些晚熟品种 ,如黑提、红提等 ,果穗套袋更为必要。一、 Grape fruit bagging is the key technology to produce pollution-free grapes. Production practice shows that grape bagging, can significantly reduce pest damage, reduce the frequency of drug use and pesticide contamination. Under normal circumstances, the bagging grapes rotten rate of less than 1%, but not bagging bad rotten rate of 20% or more, severe cases may panicle rot. In particular, some late-maturing varieties, such as black mention, red mention, earning bagging more necessary. one,