香山公园黄栌黄点直缘跳甲虫害的发生及防治技术

黄点直缘跳甲是黄栌的主要虫害,在北京地区1年发生1代,以卵在枝杈间越冬.翌年于黄栌树萌动时,孵化幼虫危害黄栌的叶片、花蕾、嫩枝,造成缺刻或孔洞,严重时只剩下叶柄.4～5月为幼虫危害盛期,8～9月为成虫危害期.温度、湿度、海拔、坡度及树龄、群落特征及降水等环境因子对黄点直缘跳甲害虫的发生有一定程度的影响.进行4种药剂单株防治试验和3种可湿性粉剂大面积林地试验,结果表明,化学防治对其有明显效果,但各药剂间的防治效果有较大区别.

Occurrence and Control Techniques of Ophrida xanthospilota on Cotinuscoggygria in Fragrance Hill Park

Ophrida xanthospilota is the main pests on Cotinuscoggygria.They occurred one generation a year in Beijing.They survive winter with eggs in the twigs.Their larvae hatched in the Cotinuscoggygria trees bud following year,damage sumac leaves,buds,twigs and cause notch or hole,leaving only the petiole when serious.The peak damage duration of the larvae's is from April to May while the damage duration of adult pests is from August to September.Temperature,humidity,altitude,slope and age,community characteristic...