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近年来我们查阅了有关果树病虫害防治的书籍和文献,发现不少版本对桃红颈天牛、桑天牛产卵伤口的记载出入颇大,致使园艺生产工作者及在校学生不能正确地从产卵伤口判断害虫种类,也影响发生量的统计和拟订防治措施。 现将我们在1979—1982四年中连续对1,486株桃树的红颈天牛(虫株率100％)的观察与研究结果列述:桃红颈天牛的卵上端较尖,下端较钝圆,略呈芝麻形,颜色浅绿,成熟时转为淡黄色,光滑,其平均长1.68毫米,宽0.78毫米。产卵部位一般于离地表1—2米之内的主干或主枝上。卵散产,卵粘粘着在多年生枝的粗糙表皮裂缝间,卵孵化后即蛀入表皮,初龄幼虫不暴露空间。与有的书上记载:卵长圆形,长6—7毫米,差距很大,颇不一致。此外,某些书籍还记载:产卵时先将树皮咬一方形裂口,然后再将卵产在裂口中,截
In recent years, we have reviewed the books and literature on the control of pests and diseases in fruit trees and found that many versions of the records of ovipositional wounds on pink-necked and mulberry-white cattle are quite different. As a result, horticultural workers and school-based students can not correctly produce Eggs wound to determine the types of pests, but also affect the amount of statistics and the preparation of prevention and control measures. Now we in the 1979-1982 four consecutive years of 1,486 peaches of red-necked Beef (Pest strain rate of 100%) the results of the observation and study: pink neck cerambycidae tip of the egg more sharp, lower rounded , A little sesame-shaped, light green color, maturity turned pale yellow, smooth, the average length 1.68 mm, width 0.78 mm. Spawning sites are generally within 1-2 meters from the surface of the main trunk or main branch. Egg spawning, egg sticking in the perennial branch of rough epidermal cracks, the eggs hatch into the epidermis, the first instar larvae do not expose the space. And some books recorded: egg oval, 6-7 mm long, a great gap, quite inconsistent. In addition, some books also record: first spawning a bark of the bark when spawning, and then lay eggs in the gap, cut