杨树粒肩天牛的生物学特性

杨树粒肩天牛在福建省2a发生1代;老熟幼虫在第2年4月下旬至5月初开始化蛹,成虫出现期始于5月底6月初,6月中下旬到7月上旬为盛发期,9月上旬只见个别成虫;产卵期始于6月中旬,6月下旬至7月中旬为产卵高峰期;幼虫孵化期为6月下旬到8月中旬,7月上中旬为为盛发期;幼虫不越冬。杨树粒肩天牛成虫为补充营养所取食的树种较集中,主要是构树与桑树。杨树粒肩天牛幼虫对杨树危害严重,但成虫却不喜欢取食杨树,用杨树饲养的粒肩天牛成虫寿命很短,仅3-19d,不产卵;而以桑树为补充营养的雌成虫的平均寿命为55d、雄26.5d;以构树为补充营养的雌成虫的平均寿命为78d、雄45.5d,补充桑树与构树的粒肩天牛成虫均可正常产卵。雌雄成虫一生可多次交尾。雌虫有多次产卵现象,单雌每天产卵数量1-12粒不等。

Biological characteristics of Apriona germari

Aprion germari (Hope) has 1 generation in 2 years in Fujian. The elder larvae began to pupate in April and May. Emergence of adult occurs in the last 10 days of May, the adult stage can last for 4 months. The female began to laid eggs in the middle of June. Larvae occurred from the middle of June, to minddle of August. A.germari mainly feed on Morus alba and Broussonetia papyrifera. Feeding on Populus, the life-span of adults was just 3-19 days; on the other hand, feeding on Morus alba, the female life-span was 55 days, the male was 26.5 days.Feeding on Broussonetia papyrifera, the female life-span was 78 days, the male was 45.5 days. The adults could mate multi-times each other in all life. During the laying season, the female adults usually laid eggs in many times, and each time a female adult could produce 1-12 eggs.