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稻纵卷叶螟是三都县水稻主要害虫之一。通过1978～1983年的系统调查,明确稻纵卷叶螟在三都县发生5代和不完全的6代,单双季稻混栽年份主害代为1、2代,为害盛期在5月上旬～7月中旬,单季中稻年份主害代为2、3代,为害盛期在6月上旬～8月上旬;各代虫源性质是:1、2代以迁入为主,3代为本地虫源本地繁殖,4代开始迁出,5、6代大部为回迁虫源;通过饲养及大田观察,摸清了各代发生期和各虫态历期;查到我县稻纵卷叶螟的寄生蜂29种,并筛选出各虫态的优势种群,1974年以来用本地拟澳洲赤眼蜂经人工繁殖用于大田防治,防效达60～90％,到1983年放蜂治虫面积达8000余亩。
Rice leaf roller is one of the major rice pests in Sandu County. Through the systematic investigation from 1978 to 1983, it was clear that Cnaphalocrocis medinalis occurred in the fifth generation and incomplete generation in Sandu County. The single and double cropping rice in the mixed planting year was the first and second generation, Early mid-July to mid-July, the single-season middle-aged rice on behalf of the main generation of the second and third generations, the damaging peak in early June to early August; generation of insect nature is: 1,2 generations to move into the main, 3 generation for the local The local breeding of insect sources began in the 4th generation, and most of the 5 and 6 generations migrated to the source of insects. Through feeding and observation in the field, the occurrence periods of each generation and the periods of the insect states were found out. 29 species of parasitic wasps and their dominant populations were screened. Since 1974, Trichogramma was used for field control by artificial propagation of Trichogramma ostriniae in the local area with an effective control rate of 60-90%. Since 1983, Up to 8,000 acres.