我们经常收到一些果农来信询问:枇杷树皮被虫蛀了,这是什么虫?怎样防治?据本人观察,是一种鳞翅目的害虫,叫“龙眼拟木蠹蛾。”其雌蛾灰白色,体长约15毫米,展翅约28毫米,胸部的背面和腹末都披有褐色鳞毛,前翅中室有相连的大小圆斑各1个,翅中部有1条粗大褐色点状的斜带,前缘和外缘都有褐点。雄蛾黑褐色,体形比雌蛾稍小。卵乳白色,长约1毫米,扁椭圆形。老熟幼虫长约30毫米,体壁坚厚,各节都有黑褐色斑点。蛹长约16毫米,褐色,头顶有1对分叉的突起。每年发生1代,以老熟幼虫在枝干蛀道内越冬。4月中旬～5月下旬于每天午后羽化 We often received a letter from the fruit farmers asked: loquat bark was moth-eaten, what is this pest? How to prevent? According to my observation, is a lepidopterous pest, called “longan moth.” The female moth gray , Body length of about 15 mm, wings about 28 mm, the back of the chest and the abdomen are covered with brown scales, forehead in the room has a connected size of a circular spot, the central wing has a thick brown point-like oblique belt , The front edge and the outer edge has brown spots. Male moth dark brown, slightly smaller than female moths. Ovum white, ca. 1 mm, oblate. Mature larvae are about 30 mm long and have firm body walls with dark brown spots on every section. Pupae ca. 16 mm, brown, with a pair of raised prongs on the head. A generation occurs each year, with mature larvae overwintering in the branches of the tunnel. Mid April to late May Emerge in the afternoon every afternoon