茄二十八星瓢虫耐饥能力及饥饿对雌成虫寿命和繁殖的影响

Effect of Starvation on the Survival Duration and Reproductivity and Longevity of Adults Females of Henosepilachna vigintioctopunctata (Fabricius)

茄二十八星瓢虫Henosepilachna vigintioctopunctata是茄科蔬菜的重要害虫。本研究就饥饿对茄二十八星瓢虫各龄幼虫及成虫存活的影响以及雌成虫饥饿对其产卵和寿命的影响进行了研究。结果表明:幼虫耐饥饿能力随龄期增大逐渐增高,雌虫耐饥能力高于雄虫,4龄幼虫耐饥能力高于雄虫。雌成虫随着饥饿天数的增加产卵量下降,卵的孵化率降低,饥饿3 d的雌成虫寿命以及与之交配的雄成虫寿命最长,未饥饿的和饥饿5 d的雌虫和相应配对的雄成虫寿命最短。产卵量和卵孵化率与饥饿天数存在线性负相关。

Henosepilachna vigintioctopunctata is an important insect pest on plants belonging to Solanaceae. Effect of starvation on the survival duration of lavae and reproductivity and longevity of adult females of Henosepilachna vigintioctopunctata (Fabricius) was studied in this research. Results showed that survival duration after starvation increased with the increase of larval instar. The survival duration of 4th instar larvae and female adults was longer than that of male adults when starved. At the same time when females were starved before mating, the reproductivity and hatch rate decreased with increase of starvation duration. The females who were starved for 3 days and the males mated with the females had the longest longevity. While the females without starvation and starved for 5 days had shorter longevity and the males who mated with those females had shorter longevity, too. The number of egg laying and hatching rate had a negative relationship with the days for starvation.