摘要
采用选择性化学药剂控制湖南省耒阳市水稻主要病虫二化螟、稻纵卷叶螟、稻飞虱和纹枯病,测定单一病虫为害损失和多种病虫复合为害损失.结果表明:病虫害致水稻有效穗减少、空壳率增加、千粒重降低.二化螟、稻纵卷叶螟、稻飞虱、纹枯病及其复合损失,造成早稻减产率分别为8.5%、9.0%、8.5%、5.3%、17.4%;晚稻分别为7.5%、11.4%、10.6%、5.7%、19.2%.
To probe into the damage of Chilo supperssalis, Cnaphalocrocis medinalis, rice planthoppers and Rhizoctonia solani to rice, a experiment was conducted by using selected chemical pesticide for controlling different pests of rice. Results show that rice diseases or pests lead to reduction in effective tillers, increase in the deflated shell rate and the decline in thousand-grain weight. The early rice loss rates of Chilo supperssalis, Cnaphalocrocis medinalis, rice planthoppers, Rhizoctonia solani and the integrated loss by diseases and pests is 8.5%, 9.0%, 8.5%, 5.3%, 17.4%, the late rice loss rates are 7.5%, 11.4%, 10.6%, 5.7%, 19.2%.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第2期170-172,共3页
Journal of Hunan Agricultural University(Natural Sciences)
基金
湖南省科技重大专项(2005NK1005)
关键词
水稻
病虫
产量损失
化学防治
耒阳
rice
diseases and pests
yield loss
chemical control
Leiyang
