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头产业已成为湘阴农业的支柱产业,近年形成的头-稻种植模式逐渐替代了过去单纯的头或水稻种植模式。为应对该种植模式所带来的病虫害对农业生产的为害,笔者于2003年对这种种植模式的病虫、天敌发生及生态调控进行了调查与研究。调查结果表明:头紫斑、霜霉、基腐病,蚜虫、韭蛆和葱蓟马等病虫主要在3月至5月发生危害,与头配套种植的单季晚稻比一般双季晚稻二化螟、稻飞虱、稻纵卷叶螟和纹枯病发生数量和为害程度前期较重,中后期明显减轻,蜘蛛及其他捕食性天敌种群数量则明显增加,对稻飞虱的控制效果较好,经济效益显著。
Yuantou industry has become the pillar industry of Xiangyin agriculture. In recent years, Yuantou - the mode of rice planting has gradually replaced the traditional Yuantou or rice planting mode in the past. In order to cope with the damage caused by pests and diseases to agricultural production brought by this planting pattern, the author investigated and studied the occurrence and ecological regulation of pests, natural enemies and natural enemies in this planting pattern in 2003. The results showed that the diseases such as squamous plumage, downy mildew, rot disease, aphids, leek maggot and thrips perch mainly occurred in March to May, and the single-season late rice planted with shyotou than the general double-season late rice The occurrence and damage degree of rice stem borer, rice planthopper, leaf roller and leaf blight were heavier at the early stage and significantly reduced at mid-and late-stage. The population of spiders and other predatory natural enemies increased significantly, and the control effect on planthoppers Better, significant economic benefits.