不同迷向丝对梨园梨小食心虫的控制作用

The relative effectiveness of using different sex-pheromone products to disrupt the mating of Grapholitha molesta(Busck)in a pear orchard

【目的】迷向技术是当前防控梨小食心虫(Grapholitha molesta(Busck)的主要绿色技术之一,其防控效果取决于迷向丝产品质量及施用方法。为了探究该技术在防治梨小食心虫的田间控害效果,对几种广泛使用的主流迷向丝产品进行了田间定量测定。【方法】选取有代表性的诱尔、宁录生态、神绿植保和澳福姆4种迷向丝产品,于2020年7月在烟台市莱阳市梨园按40根/667m^(2)的密度悬挂,选择2种诱捕器监测梨小食心虫种群动态,计算不同迷向丝的迷向率、蛀果/蛀梢率,同时比较2种诱捕器的诱捕效果。【结果】4种迷向丝的迷向率均高于80%,各处理区迷向丝产品的迷向效果(P>0.05)和蛀果/梢率(P>0.05)差异不显著,蛀梢率均低于3%,蛀果率均低于2%。2种监测诱捕器的诱捕结果存在显著性差异(P<0.05)。【结论】4种主流迷向丝防控效果差异不大,均能达到理想的防治效果,因此在梨园利用迷向法控制梨小食心虫是高效的绿色防控技术。

[Aim]To determine the relative effectiveness of different sex pheromone products for disrupting the mating of Grapholitha molesta(Busck)in a pear orchard.[Methods]Four brands of mating disruption products;You’er,Ninglu Shengtai,Shenglv Zhibao and Aofumu,were tested in a pear orchard in Laiyang City in July,2020.Pheromone dispensers were hung in pear trees at a density of 40 per 667 m^(2) and 2 kinds of traps were operated during the same period.In addition,the ratio of damaged fruit and shoots were calculated as an indicator of effectiveness of control.[Results]There were no significant differences among the 4 brands of mating disruption products tested;all were more than 80%effective and achieved fruit and shoot damage ratios of<2%and 3%,respectively.[Conclusion]There are no significant difference between the 4 brands of mating disruption products tested.All four products should therefore be effective for disrupting the mating of G.molesta damage in pear orchards.