基于性诱剂监测的梨小食心虫防治指标  

Control index based on number of adults of Grapholita molesta captured by sex pheromone traps

作　　者：杜娟[1] 刘彦飞[1] 谭树乾[1] 仵均祥[1] 

机构地区：[1]西北农林科技大学植物保护学院,应用昆虫学重点实验室,旱区作物逆境生物学国家重点实验室,陕西杨凌712100

出　　处：《植物保护学报》2013年第2期140-144,共5页Journal of Plant Protection

基　　金：国家公益性行业(农业)科研专项(201103024)

摘　　要：为明确梨小食心虫性诱剂水盆诱捕器诱蛾量与梨果着卵量的关系,建立一种简单实用,基于梨小食心虫成虫发生量的防治指标,于2010和2011年在陕西蒲城梨园调查了梨小食心虫在早酥梨上的着卵情况及其与性诱剂水盆诱捕器诱蛾量之间的关系。结果显示,梨小食心虫在梨果胴部的着卵量显著高于其它部位,占总卵量的92.00%;百果卵数、卵果率随果实的增大而增加,直径70mm以上果实的百果卵数和卵果率均显著高于直径65 mm以下的果实。据此建立了诱蛾量与卵果率、百果卵量的回归方程,分析得出当以卵果率1%和百果卵量1粒为防治指标时,基于性诱剂监测的梨小食心虫的防治指标分别为每天每诱捕器2.27和2.32头;以卵果率2%和百果卵量2粒为防治指标时,则分别为每天每诱捕器2.61和2.58头。The objective of this study was to find out the relationship between number of adults of Gra- pholita molesta captured with sex pheromone traps and number of eggs laid pear fruits, and establish one effective and convenient control index upon quantity of occurrence of adults. Number of eggs laid on fruit and number of moths captured with sex pheromone were examined in pear （Putts bretschneideri cv. Zao- su） orchard of Pucheng County, Shaanxi in 2010 -2011. The results showed that rate of eggs laid torso of fruit was 92.00%, significantly higher than other position of fruit. Rate of fruits infected with eggs and number of eggs per 100 fruits increased with the increase of diameter of fruit. Rate of fruits infected with eggs and number of eggs per 100 fruits of fruits with greater than 70 mm diameter significantly higher than fruits with less than 65 mm diameter. In light of the relationships above, regression models were estab- lished between rate of fruits infected with eggs, number of eggs per 100 fruits and number of moths daily captured per trap. If taken 1% of fruits infected with eggs and 1 egg per 100 fruits as control index, the control index based on number of G. molesta spectively. While taken 2% and 2 as control captured with sex pheromone traps was 2.27 and 2.32, re- index, that control index was 2.61 and 2.58, respectively.

关 键 词：梨小食心虫 防治指标 卵果率 百果卵量 

分 类 号：S436.612[农业科学—农业昆虫与害虫防治]