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柿双棘长蠹近几年在陕西关中和陕南柿产区分布普遍,危害严重,为害株率在30%～45%,枝条受害率一般在5%～15%,受害严重的达70%以上,1～2年生枝条大部分受虫蛀折断,产量损失严重。现将该虫形态特征、生物学特性及防治技术介绍如下。1 形态特征1)成虫。体长4～7 mm,圆筒形,黑褐色,体两侧平直,密被淡黄色短毛。触角10节,端部3节栉片状向内横生。前胸背板长宽相等,小盾片近方形,坡鞘刻点沟大而深,鞘翅末端斜面上生有双棘,棘端钝。2)卵。长椭圆形,长约0.4mm,黄白色。3)幼虫。体弯曲,乳白色,口器红褐色,胸足3
In recent years, Persimmon persimmon has been widely distributed in Guanzhong and Shannian persimmon producing areas in Shaanxi Province. The damage rate is 30% -45%, the damage rate of branches is 5% -15%, and the serious damage is 70% Above, 1 to 2 years old branches mostly by worm moth broken, yield loss serious. Now the morphological characteristics of the insect, biological characteristics and prevention techniques described below. 1 morphological characteristics 1) adult. Body length 4 ~ 7 mm, cylindrical, dark brown, straight on both sides of the body, densely pale yellow short hairs. Tentacles 10 knots, the end of the three sections of the criss-cross inward. The length and width of the front and back panels are the same, the scutellum is nearly square, and the scabbard is large and deep, with double spines and blunt prickly branches. 2) Eggs. Long oval, about 0.4mm, yellow-white. 3) larvae. Body bending, white, mouthparty reddish brown, chest and foot 3