芦笋小管蚜的发生与为害

ON THE BIOLOGY AND DAMAGE OF ASPARAGUS APHID TO ASPARAGUS

芦笋小管蚜(Brachycorynella asparagi Mordvilko)是我国芦笋的一种新害虫,在山西、陕西均有分布,主要为害芦笋(Asparagus officinalis L.)。芦笋小管蚜为全周期昆虫,在陕西关中,卵于3月初孵化,5月底、6月初孤雌蚜种群开始上升,6月底、7月初出现高峰。孤雌蚜4个龄期,在24.52℃时,完成1个龄期3d左右,若虫期共11.20d。孤雌蚜在条件适宜时,一生可产21头若蚜,1头雌性蚜可产卵9粒。该虫为害对株高的影响最大,其次为鲜重。不同地势、不同方向的植株之间,雌雄株之间的蚜害程度有明显差异。

In Guanzhong Area of Shaanxi Province, the asparagus aphid Brachycorynella asparagi Mordvilko,a holocyclic insect pest of asparagus found newly and distributed in Shanxi Province and Shaanxi Province, hatches in March, the population of viviparae increases in late May to early June, and attains to its occurrence peak in late June to early July. The nymph vivipara goes through four instars, and maintains 11. 2 days under 24.52 ℃. Under appropriate conditions, it is capable to produce 21 nymphs/vivipara and 9 eggs/oviparous female. The damage of B. asparagi causes the decrease of height primarily and the fresh weight secondarily to asparagus plant,and the damages are variable, depending on the different topologies, directions of fields ,and sexes of asparagus plants.