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花卉植物虫害:双线盗毒蛾

Miss Chen
2017-09-12
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分布与危害

#双线盗毒蛾 又名棕衣黄毒蛾,属鳞翅目,毒蛾科,主要分布我国南方。

荷花、四季海棠、鱼尾菊、扶桑、茉莉、山茶花等花木。

以幼虫取食叶片。

形态特征

成虫:雌蛾体长12毫米,雄蛾体长9.3毫米。头橙黄色,胸部浅黄棕色。前翅赤褐色略带浅紫色闪光,翅上具黄色双线,前缘、外缘和缘毛柠檬黄色。后翅黄色。腹部褐黄色,肛毛簇橙黄色。

幼虫:体长20-25毫米,暗棕色具红色侧瘤,后胸背线黄色。腹部第1、2节和第8节有棕色短毛刷,2-7节背线黄色,末节具黄斑。

蛹:土黄色,背面体节具褐色斜斑。体表有许多刚毛,尾湍具多根带钩臀刺。

发生规律

华南从3-11月均发现幼虫为害。幼虫对核型多角体病毒敏感。成虫具趋光性。

防治方法

A.利用黑光灯诱杀成虫。

B.化学防治:尽量选择在低龄幼虫期防治。此时虫口密度小,危害小,且虫的抗药性相对较弱。防治时用45%丙溴辛硫磷(国光依它)1000倍液,或国光乙刻(20%氰戊菊酯)1500倍液+乐克(5.7%甲维盐)2000倍混合液,40%啶虫.毒(必治)1500-2000倍液喷杀幼虫,可连用1-2次,间隔7-10天。可轮换用药,以延缓抗性的产生。
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