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农学学报

农学学报 ›› 2017, Vol. 7 ›› Issue (1): 19-26.doi: 10.11923/j.issn.2095-4050.cjas16070015

所属专题： 玉米

• 植物保护 • 上一篇    下一篇

玉米矮缩病危害的损失测定与防治指标研究

王华弟,陈剑平,祝小祥,赵敏,戴德江,沈颖,王道泽,王国迪,徐志宏,祝增荣   

  1. 浙江省农药检定管理所,浙江省农业科学院,浙江省临安市植保土肥站,浙江省桐庐县农业技术推广中心,浙江省农药检定管理所,浙江省农药检定管理所,杭州市植保土肥总站,杭州市植保土肥总站,浙江农林大学,浙江大学
  • 收稿日期:2016-07-19 修回日期:2016-08-25 接受日期:2016-09-18 出版日期:2017-02-06 发布日期:2017-02-06
  • 通讯作者: 王华弟 E-mail:if8ynr
  • 基金资助:
    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)。

Yield Loss and Control Index of Maize Dwarf Disease

  • Received:2016-07-19 Revised:2016-08-25 Accepted:2016-09-18 Online:2017-02-06 Published:2017-02-06

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摘要： 为明确玉米矮缩病发生程度与玉米产量损失之间的关系，2011—2013年在浙江省临安市和桐庐县系统调查了玉米矮缩病在主栽品种‘浚单20’、‘浚单18’上的发生、危害及产量损失情况。结果表明：与健株相比，感病玉米植株均表现株高下降、节间缩短、叶长变短、叶宽变窄、果穗缩短、实粒减少、粒重下降；发病程度为1~4级的病株生物量下降28.76%~81.31%，单穗籽粒产量分别下降32.29%~98.91%。玉米植株发病率为2.31%~39.44%，产量损失率为1.03%~32.13%，两者呈显著相关性。通过回归分析建立了危害损失关系式，根据现有玉米生产条件和效益水平，计算出经济允许损失水平并制订了相应的防治指标。

关键词: 海拔, 海拔, 移栽期, 打顶方式, 翠碧一号, 烟叶产质量。

Abstract: To define the relationship between the severity of maize dwarf disease and yield loss, experiments were conducted in Lin’an City and Tonglu County, Zhejiang Province, during 2011～2013. The disease incidence, damage and yield losses were assessed on the widely-grown maize varieties Jundan 20 and Jundan 18. 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 plants with disease grades 1～4 decreased by 28.8%～81.3% in biomass and by 32.3%～98.9% in grain yield per ear. Yield losses (1.03%~32.13%) were significantly correlated with disease incidence (2.31%~39.44%). The formula for reflection 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.

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