黑绒金龟甲是近年在果园害虫中日益加重的一个优势种,特别是对幼龄果园,为害最为严重。黑绒金龟甲于每年4月下旬和5月上旬活动旺盛,大量蚕食芽叶,一般芽叶被害率达50%左右,幼树在密度大的情况下,幼芽叶被食光以至全毁,造成幼树抽稍困难,延迟结果,树势衰弱,枝条早期干枯,甚至死亡。黑绒金龟甲主要以成虫为害,一年一代,以成虫在土中越冬。4月上旬随地温回升,逐渐上升至耕作层。早期成虫取食萌发早的苜蓿、杨柳树等嫩芽,随着果树芽的萌发,而迁移到其上为害。为害盛期一般在4月下旬至5月中旬,为害期约为80天左右。成虫具有趋光、假死和群体迁移习性,受温度影响较大,白天晴朗,夜间无风,大量出土活动为害。如遇降温、降雨和大风天气可随时入土隐藏,喜爱 Black velvet tortoiseshell is an increasingly dominant species in orchard pests in recent years, especially for young orchards, the most serious damage. Black velvet tortoiseshell in late April and early May each activity, a large number of nocturnal buds, the general injury rate of buds of about 50%, saplings in the case of high density, sprout leaves were eaten as well as the whole destruction, Slightly difficult to draw the young tree, delayed the result, frail, branches early dry, and even death. Black velvet tortoiseshell mainly adult damage, one generation, in order to adult overwinter in the soil. In early April with the ground temperature rise, and gradually rise to farming layer. Early adults eat early germination of alfalfa, willow and other tender buds, with the buds of fruit germination, and migrate to its damage. Harmful duration is generally late April to mid May, the damage period is about 80 days. Adult with phototaxis, suspended animation and population migration habits, affected by temperature greater daytime sunny, no wind at night, a large number of unearthed activities harmful. In case of cooling, rainfall and windy weather can be buried at any time, like