水稻条纹叶枯病的为害损失及防治指标  

Rice Yield Loss Caused by Rice Stripe Disease and Economic Threshold

作　　者：王华弟 陈剑平[2] 祝增荣[3] 孙祥良 朱金良 傅强[6] 朱黎明[1] 

机构地区：[1]浙江省植物保护检疫局,浙江杭州310020 [2]浙江省农业科学院,浙江杭州310021 [3]浙江大学昆虫科学研究所/水稻生物学国家重点实验室,浙江杭州310029 [4]浙江省嘉兴市农业科学院,浙江嘉兴314000 [5]浙江省嘉兴市病虫测报站,浙江嘉兴314001 [6]中国水稻研究所水稻生物学国家重点实验,浙江杭州310006

出　　处：《中国水稻科学》2008年第2期203-207,共5页Chinese Journal of Rice Science

基　　金：浙江省重大科技攻关资助项目(2005C12033);国家863计划资助项目(2007AA10Z220)

摘　　要：2004—2006年在浙江北部系统地调查了水稻条纹叶枯病发病动态和为害损失。单季晚稻秧田期介体灰飞虱有效虫量（X2）与水稻株发病率（Y1）的关系式为Y1=0．0873＋1．0757X2，晚稻本田株发病率（X）与产量损失率（Y）总关系式为Y=0．1254＋0．7551X。在现有生产条件下，经济允许水平以损失率表示为2．0％～2．5％，制订了水稻条纹叶枯病防治指标为水稻秧苗期和本田前期介体灰飞虱有效虫量2～3头／m^2，该指标已在生产上大面积推广应用。Rice stripe disease, transmitted by the rice small brown planthopper Laodelphax striatellus Fallen （Homoptera： Delphacidae）, has been a severe devastating disease in Northern Zhejiang, China since 2004. To understand the relation of rice grain yield loss to the incidence of the disease and the density of the vector, a series of experiments were conducted from 2004 to 2006 in rice fields. The results showed that the incidence of the disease （Y1） at the seedling stage increased with the increasing density of infectious vector （X2） as the equation of Y1 =0. 0873 ＋ 1. 0757X2 ,while the rice yield loss （Y, % ） increased positively in a linear mode with the incidence （X,% ） in the single-cropping late rice as Y= 0.1254 ＋0. 7551 X. The economic injury level （EIL） was calculated as 2.0%-2.5% of yield loss according to the current economic scenarios for rice production for the control of the disease. Therefore the economic threshold for controlling the disease was set as the density of 2-3 per square meter of the small brown planthopper in the seedling nursery and at the early stage in rice fields. Such economic threshold has been practically applied in control of the disease in large scale fields and a significant economic benefit has been achieved.

关 键 词：水稻 条纹叶枯病 产量损失 防治指标 

分 类 号：S435.111[农业科学—农业昆虫与害虫防治]