【摘要】 杨潜叶跳象在北京市密云县1a发生1代,以成虫在石头、枯枝落叶下和表土内越冬。调查发现:毛白杨不受害,北京杨受害率10.1%,加杨受害率7.6%。树干注射20%康福多可溶性液防治杨潜叶跳象,用药量每cm胸径0.1,0.2和0.4mL,清水对照。18d后,3种处理与对照相比差异极显著;28d后,注射0.1,0.4mL的与对照有极显著差异,注射0.2mL的与对照差异显著;38d后,处理与对照之间差异不显著。利用康福多防治杨潜叶跳象的同时,可兼治杨雪毒蛾,也可保护3种金小蜂、1种三盾茧蜂。更多还原

【Abstract】 Rhynchaenus empopulifolis Chen had one generation a year in Beijing and overwintered as adult in duff and soil.It attacked Populus beijingensis with an infestation rate of 10.1% and P.×canadensis with an infestation rate of 7.6%,but didn’t attack P.tomentosa.Trunk injection of 20% confidor at the dosage of 0.1,0.2,0.4 mL per cm of diameter at breast height had a good control effect.There was significant difference between the 3 treatments and the control 18 days after the injection.The difference between the injection of 0.1,0.4 mL and the control was very significant 28 days after the injection.There was no significant difference between the 3 treatments and the control 38 days after the injection.The injection treatment could also depress Stilpnotia candida and protect three species of Pteromalus and one species of Triaspis.更多还原