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桑剑纹夜蛾(Acrong cta major Bremer)其幼虫称桑白毛虫。近年来此虫在江苏无锡一带发生较多,因其虫体大,幼虫食量大,对桑树造成的为害也较大,严重时整株桑树片叶被吃光,对蚕桑生产造成较大损失。为了控制为害,1988—1989年我们开展了此虫发生规律及其防治技术的研究,现将研究结果简述如下:一、形态特征卵:呈半球形,直径0.6—1毫米,扁平,中央隆起,上面布满许多紫红色花纹。
Mulberry swordworm (Acrong cta major Bremer) its larvae mulberry white caterpillar. In recent years, this insect occurred in the vicinity of Wuxi, Jiangsu Province, because of its large larvae, larvae food intake, the damage caused by the mulberry is also greater, the whole plant mulberry leaves were eaten, resulting in greater loss of sericulture production. In order to control the damage, 1988-1989 we conducted a study of the occurrence and control of this worm, the research results are summarized as follows: First, the morphological characteristics of eggs: hemispherical, 0.6-1 mm in diameter, flat, central uplift , Covered with many purple patterns.