论文部分内容阅读
近几年褐卷叶蛾(取食苹果、桃、李等果树的叶及果实)在北京市果园危害呈上升趋势,此虫一旦形成卷叶,一般化学杀虫剂发挥不了杀虫作用,给果品生产带来较大的经济损失。 一、褐卷叶蛾与防治有关的生活习性。 褐卷叶蛾以1-2龄幼虫在被害树体枝干的粗皮、裂缝、剪锯口周围的死皮和在枝干吐丝粘合的干叶片下结薄茧越冬,4月17日至22日之间越冬幼虫出蛰(通过一九九九、二○○○年在标准树主枝上涂20cm宽凡士林环观察),与油桃盛花期相吻合。5月中旬至6月上旬虫体稍大时吐丝2-4片叶。(形成卷叶)在其中啃食叶肉,有的幼虫吐丝将叶片粘在果面上(见照片:褐卷叶蛾在油桃果实上的危害状),潜伏在其中啃食果面。成虫有较强的趋化性。第一次危害果实高峰在6月
In recent years, brown leaf roller moth (eating apple, peach, plum and other fruit trees leaves and fruits) in Beijing orchard hazards are on the rise, once the formation of this insect leafworm, the general chemical insecticide can not play a pesticide effect, to fruit production Bring greater economic losses. First, the brown leaf roller and control-related habits. The first two instar larvae were killed in the bark of the tree trunk, cracks, scissor around the dead skin and dried branches in the trunk of the silk-caked silkworm cocoon knot winter, April 17 to 22 The wintering larvae stung (observed with a 20cm wide Vaseline ring on the main branch of a standard tree in 1999 and 2000) coincide with the flowering stage of nectarine. From mid-May to early June, parasites 2-4 silk leaves. (Forming a leaf curl) in which the eating of the mesophyll, some of the larvae to silk leaves stuck to the fruit surface (see photo: Flatworm leaf nectarine fruit harm), lurking in which eating fruit surface. Adults have strong chemotaxis. The first fruit hit the peak in June