气候条件对油菜菌核病的影响及防治阈值

• 作 者: 张永泰 李爱民 惠飞虎 房风珠
• 机 构: 江苏里下河地区农科所,江苏里下河地区农科所,江苏里下河地区农科所,江苏省兴化市农业局 扬州 225002,扬州 225002,扬州 225002,兴化
• 出 处: 植物保护学报
• 发表日期: 1999年02期
• 关键词: 气候条件 油菜菌核病

油菜菌核病是里下河农区首要病害,常年发病指数约20％,损失产量15％～30％。对兴化、扬州油菜菌核病连续8年的观测结果表明,油菜开花期的降雨量是导致并加重菌核病的决定因素,而日均气温对菌核病的影响不大。降雨量与菌核病发病指数间的关系可用方程y=4.8697+0.4201x表示。病害不仅使千粒重降低,导致减产,而且使含油率下降,影响品质。作者还对防治阀值进行了探讨。

Sclerotinia sclerotiorum is the most important disease in the Lixiahe agricultural area. The perennial incidence index is about 20%, and the loss of yield is 15% ~ 30%. For Xinghua and Yangzhou, rapeseed sclerotinia eight consecutive years of observations showed that rapeseed flowering is the leading and aggravate the determinants of sclerotinia, and the average daily temperature on sclerotinia little. The relationship between rainfall and sclerotinia disease index can be expressed as y = 4.8697 + 0.4201x. Diseases not only reduce the 1000-grain weight, resulting in reduced production, but also to reduce the oil content, affecting quality. The author also discusses the control threshold.