核桃举肢蛾发生规律和防治研究

Studies on the Bionomics and Integrated Control of Atrijuglans hetaohei Yang.

核桃举肢蛾是核桃最严重的害虫之一。1986～1988年在洛南县对其发生规律和综合防治方法进行了研究。此虫在洛南一年发生1～2代,以老熟幼虫在树冠下1～2cm深的表土层中结茧越冬。其发生轻重与核桃树生境条件、4～6月降水量及降水日照的综合作用有关。荫蔽潮湿、杂草丛生的深山沟道和阴坡发生最重,阳坡和耕种地发生最轻。降水日照综合系数大的年份发生严重。提出了以树冠下地面深翻为基础、树冠喷药为应急手段、摘拾虫果集中深埋为辅助措施的综合防治办法。

Describes the bionomics and integrated control of the insect pest Atrijug lans hetaohei Yang.in Luonan County, Shaanxi during 1986-1988. It has 1- 2 generations a year and over winters as pupas larva under the soil surface the crawn. The degree of infestation is related to the habitat of the tree, the precipitation and the rainfall to sunshine ratio in April, May and June. The bigger the rainfall to sunshine ratio the serious the damage would be occur. In moist, shady and weedy areas of mountains, gullies or hillsides, the damage is more serious that in the cultivated lands and south slopes. It. is suggested that deep ploughing beneath the crown of the tree, applying of insecticides on the crown picking and deep burying of injured dry fruits be adopted as the integrated control measures.