草履蚧的生活史及越冬卵在土壤中的分布调查  

The Life History of Drosicha corpulenta and its Distribution of Overwintering Eggs in Soil

作　　者：侯引侠[1] 郭新荣[2] 谭鹏 刘兴权[1] 

机构地区：[1]户县林业科技中心,陕西户县710300 [2]西北林学院,陕西杨凌712100 [3]银川园林科研所,宁夏银川750001

出　　处：《陕西林业科技》1999年第3期54-56,59,共4页Shaanxi Forest Science and Technology

摘　　要：草履蚧在陕西１ 年发生１ 代，一般情况下越冬卵孵化盛期为２ 月中下旬，若虫２ 月中旬至３月下旬上树危害，雌成虫４ 月下旬至６ 月中旬下树，下树雌虫在树干周围的地面杂物下、土缝、疏松土层内产卵越夏和过冬。蚧虫卵在树冠下土壤中的分布规律、分布量与距树干的距离远近有关，集中分布于距离树干６０ ｃｍ 范围内地面以下０～５、６～１０ ｃｍ 的土层中。以土壤中草履蚧的卵量作为该虫的防治指标时，指标值确定为树冠下在离树干６０ ｃｍ 范围内、０～１５ ｃｍ 土层中１００ ｃｍ ２ 面积下有卵（８～１０）±２Drosicha corpulenta has one generation a year, overwintering eggs hatched in the middle later of February, nymphae climbed tree for damaging from the middle of February to the later of March, female adult leaves off tree during the later of April to the middle of June, female oviposited in the litter, soil slot and loosen soil layer round the trees, the eggs oversummered and overwintered also in there. Distributing patterns and numbers of the eggs relate to the distance of the trees. The eggs are distributed mainly in 0～10 cm soil around 60 cm from the trees. Taking the egg density as control threshold, the control threshold is (8～10)±2 eggs per 100 cm 2.

关 键 词：草履蚧 生活史 卵 分布 防治 

分 类 号：S763.35[农业科学—森林保护学]