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甘薯卷叶螟Dichocrocis diminutiva(Warren)又名甘薯会叶螟,属鳞翅目、螟蛾科,已知分布于浙江、福建、广东等省,浙南地区多有发生。幼虫吐丝卷叶,啃食叶肉,为害颇重。1979年春,温州市郊郭溪公社有几块被害较重的甘薯苗床,株被害率达85％以上,叶被害率30％左右。甘薯卷叶螟常与甘薯麦蛾并发,造成薯叶大量缀卷,严重时一片焦枯。近年来此虫在温州一带为害程度有加重趋势,为此我们对其生活习性等做了一些初步研究,现将结果介绍如下: 一、形态特征(见图) (一)成虫 体长10—12毫米,翅展20—23毫米。全体桔黄色,复眼紫红色。前翅外缘线黑褐色,内横线和外横线之间有黑斑一个呈肾脏形;翅基附近有2个小黑斑,顶角和臀角内
Dichocrocis diminutiva (Warren), also known as the sweet potato will leaf miner, is a Lepidoptera, Pyralidae, is known to distribute in Zhejiang, Fujian, Guangdong and other provinces, southern Zhejiang occurred. Larvae curly leaves curly leaves, gnawing mesophyll, damage quite. In the spring of 1979, there were several batches of sweet potato slaughtered in Guoxi Commune, a suburb of Wenzhou City. The rate of damage was more than 85% and the rate of leaf damage was about 30%. Sweet potato leaf miner often with sweet potato moth concurrent, resulting in a large number of potato leaf Juan volume, a serious scorch. In recent years, the insects in Wenzhou area harm degree tends to increase, for which we have done some preliminary study of their habits, etc., the results are described below: First, the morphological characteristics (see Figure) (a) adult body length 10-12 Mm, wingspan 20-23 mm. All orange, compound eyes fuchsia. Front wing fringe dark brown, horizontal line and outer horizontal line between the black spot a kidney-shaped; wings near the base of two small black spots, vertices and glutes