抚宁吉松叶蜂生物学特性及防治技术研究

抚宁吉松叶蜂Gilpinia funingensis Zhou et Huang是危害油松的一种新害虫.此虫在河北省抚宁县1年发生两代,以预蛹在地面越冬,有滞育现象.雌雄性比为1:0.61.产卵量平均为70粒,平均寿命4.7天,无孤雌生殖现象.幼虫5龄,喜食老叶,食叶量近400cm.抚宁吉松叶蜂有喜阴习性,在郁闭度较大的油松林中发生较重.天敌主要有平庸赘寄蝇、镶颚姬蜂、松毛虫狭颊寄蝇,寄生率50％左右.应用40％氧化乐果乳油2000倍液或20％速灭杀丁乳油5000倍液喷雾防治幼虫,防治效果可达90％以上.

Biological Characteristics and Prevention of Gilpinia funingensis Zhou et Huang

Gilpinia funingensis Zhou et Huang is a new insect which damages Pinus tabulaeformis.The insect occurs two generations per year,lives through the winter on the earth by pupa and could stop processing in winter.The ratio of female to male is 1:0.61,average ovipositing is 70 and the average life exceptancy is 4.7 days.The asexual reproduction has been found so far.Five days larvae like to eat old leaves and the amount not of eating leaves is nearly 400cm.Gilpinia funingensis is of the habit of living in shade,so they occur more seriously in forest where the conopy density is much denser.Moreover,main natural enemies and chemical controls to Gilpinia funingensis are introduced in this article.