广州地区小菜蛾种群动态监测调查  

Investigation of the occurrence of Plutella xylostella in Guangzhou

作　　者：林小军[1,2] 谢伟烈 刘健帮 曾玲[2] 

机构地区：[1]广州市农业环境与植物保护总站,广东广州510405 [2]华南农业大学资源环境学院,广东广州510642 [3]广州市白云区农业技术推广中心,广东广州510405 [4]广州市番禺区农业技术推广管理办公室,广东广州511400

出　　处：《广东农业科学》2013年第16期91-92,97,共3页Guangdong Agricultural Sciences

摘　　要：小菜蛾Plutella xylostella Linnaeus是南方十字花科蔬菜上重要害虫,常年发生危害,造成的经济损失巨大。为提高预测预报和防控水平,应用性诱剂对广州地区小菜蛾发生动态进行监测,分析了气候因子对该虫发生的影响,明确了小菜蛾种群消长规律。小菜蛾种群发生动态及其与主要气候因子关系研究调查结果表明,小菜蛾的诱虫量在2月份出现1个小高峰,6～7月份数量较低,而9～11月份是一年中的第2个高峰,发生数量居全年最高。小菜蛾成虫数量与气温变化有显著相关性。随着温度上升,小菜蛾的诱虫量呈现先上升后下降的趋势。小菜蛾成虫数量与温度之间关系符合二次线性方程y=-18.0285+13.7018x-0.3906x2。小菜蛾成虫数量与降雨量变化有显著相关性。当雨量由少到多时,成虫数量随之减少。两者间关系可用方程y=94.69464-0.44311x+0.000897x2描述。The population dynamics of diamondback moth Plutella xylostella in Guangzhou in recent years were monitored by sex pheromone lures,and the impacts of climatic factors on the populations of diamondback moth were also analyzed.Main results of dynamics of P.xylostella and its relationship with climate factors were as follows： diamondback moth appeared its first population peak in February,and the lowest population was observed between June and July.The second population peak with the highest number throughout the year appeared from September to Novemeber.The correlation was significant between diamondback moth adults aptured and aerial temperature.And its population increased,and then decreased as the aerial temperature went on.The equation to fit the two parameters relationship was y =-18.0285 ＋13.7018x-0.3906x2.The correlation between the rainfall and diamondback moth adults aptured was significant,and fit by the formulation,y=94.69464-0.44311x＋0.000897x2。

关 键 词：小菜蛾 种群动态 气候因子 

分 类 号：S436.341.24[农业科学—农业昆虫与害虫防治]