杨树橙斑白条天牛的生物学特性

橙斑白条天牛(Batocera davidia Deyrolle)是福建省杨树的新害虫,该虫在福建省2a发生1代,以幼虫和成虫越冬,一般成虫于秋季羽化,停留于蛹室越冬,次年春夏陆续自蛹室向外作椭圆形的羽化孔而飞出。成虫5月上旬开始产卵,5月下旬初孵幼虫开始取食危害,次年7月下旬开始化蛹,8月中下旬成虫羽化。少部分成虫在8月下旬爬出羽化孔,补充营养后交配产卵,大部分成虫在蛹室内越冬。在幼龄林,雌虫主要产卵于树干基部,随着树龄的增加和树皮的增厚,多产卵于2m以下的树干上。每雌产卵38-52粒,平均46.2粒。林间卵的孵化率为53%-76%。

Studies on biology of Batocera davidia

Batocera davidia is a new pest on the poplar in Fujian Province. The pest takes place one generation every two years in Fujian, and overwinters with the developmental phases of adult or larvae. Generally, adults emerge in fall, but overwinter in pupa cell, and then fly from the oval-shaped emergence hole up to next spring or summer. Females begin to oviposit in early May, and each female spawns 38-52 grains, with the mean value of 46.2 grains. Larvae appear and attack the poplar in late May. The old larvae pupate in late July of next year, adults emerge in the mid and late August , but less individuals fly out from pupa cell to replenish nutrition and oviposit in late August. Most adults lay eggs in the basal tree stem. With the increase of the tree age and bark thickness, most females lay eggs in tree stem lower than two meter. About 53%-76% of eggs successfully hatch in the field.