农学学报2017，Vol.7Issue(1)：19-26,31,9.
玉米矮缩病危害的损失测定与防治指标研究
Yield Loss and Control Index of Maize Dwarf Disease
摘要
Abstract
To define the relationship between the severity of maize dwarf disease and yield loss,experiments were conducted in Lin'an and Tonglu,Zhejiang Province,from 2011 to 2013.The disease incidence,damage and yield losses were studied on the widely-grown maize varieties'Jundan 20'and'Jundan 18'.The results showed that compared with healthy maize plants,infected plants had lower height,shorter internodes and fruiting ears,narrower and shorter leaves,fewer filled grains and lower grain weight.The biomass of plants with disease grades of 1-4 decreased by 28.76％-81.31％,grain yield per ear decreased by 32.29％-98.91％.Yield losses (1.03％-32.13％) were significantly correlated with disease incidence (2.31％-39.44％).The formula of the relationship between damage and yield loss was developed by regression analysis.The economic threshold was calculated and the index was set for the disease control on the basis of the current conditions and economic benefits of maize production.关键词
玉米矮缩病/危害动态/产量损失/防治指标/应用Key words
Maize Dwarf Disease/Damage Dynamics/Yield Loss/Control Index/Application分类
农业科技引用本文复制引用
王华弟,祝增荣,陈剑平,祝小祥,赵敏,戴德江,沈颖,王道泽,王国迪,徐志宏..玉米矮缩病危害的损失测定与防治指标研究[J].农学学报,2017,7(1):19-26,31,9.基金项目
浙江省重大科技专项重点农业项目“玉米重大病毒病监测预警与持续控制技术研究与推广”(2010C12027). （2010C12027）
