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榆卷叶象甲Atomapoderus ruficollis Fabr.是榆树的一种常见害虫。该虫鞘翅深蓝色,复眼黑色,额部有一圆形黑斑,虫体其他部分均为黄色。其卵、幼虫及蛹皆呈黄色(图:1、2、3、4)。 该虫在西安地区一年发生两代,以成虫在寄主植物附近枯枝落叶下、砖石或土缝内越冬,翌年6月下旬越冬成虫才出来取食和繁殖后代。 雌虫产卵前,先选好叶片,而后用口器从叶片的一侧横着咬断到叶中脉附近,再用头管和足把咬断的半个叶片卷折成筒状(图:5)。叶筒的一端与未被卷的半片叶贴紧,另一端待产卵后再将口拆封好。每个叶筒内仅产卵一粒。卵、幼虫及蛹期都在叶筒内生活。卵期5—6天;幼虫期12天左右,共三龄;蛹期4—5天;成虫寿命20—50天(多在25天以上)。 成虫羽化后,咬破叶筒从一端钻出爬上枝
Atomapoderus ruficollis Fabr. Is a common pest of the elm tree. The insects sheath dark blue, compound eyes black, the forehead has a circular dark spot, the rest of the parasites are yellow. The eggs, larvae and pupae are yellow (Figure: 1,2,3,4). The insects occur in Xi’an area two generations a year, in order to adults in the host plants near the litter, masonry or soil seams in the winter, the late winter the following year overwintering adults feeding and breeding offspring. Before oviposition of the female, the leaf is selected first, and then the mouthpiece is used to bite off from one side of the leaf to the vicinity of the leaf midrib, then the half leaf snapped by the head tube and the foot is rolled into a tube ). One end of the barrel is not rolled up with half a leaf, and the other end is to be spawned and then the mouth is opened and sealed. Only one egg is spawned in each leaf cylinder. Eggs, larvae and pupal stage in the cylinder life. Egg 5-6 days; larvae of about 12 days, a total of three age; pupal 4-5 days; adult life of 20-50 days (more than 25 days). After the emergence of adults, bite broken cylinder Drill climb from the side branches