中文摘要：

昆虫交配是一个消耗能量的过程,因此交配后可能对其抗逆能力造成一定的影响。广聚萤叶甲是恶性杂草-豚草的专一性天敌,正常情况下,成虫耐饥饿和耐热能力较强。为明确交配对广聚萤叶甲成虫抗逆能力的影响,本研究观察在一次交配处理后,广聚萤叶甲在饥饿条件下或高温条件下继续存活时间。结果发现,在不提供食物的情况下,交配对雄虫的寿命影响不大,但雌虫的寿命（8.4 d±0.1 d）显著短于对照雌虫（10.8 d±0.1 d）。在高温状态下,无论取食与否,交配都会显著增加广聚萤叶甲雌雄成虫的耐热能力,尤其以雌虫表现更为明显（处理雌虫和对照雌虫存活时间分别为：取食（6.15 d±0.14 d,4.95 d±0.13 d）、不取食（5.55 d±0.13 d,4.81 d±0.11 d）。可见,交配降低广聚叶甲雌虫的饥饿能力,但成虫的耐热能力显著加强。

英文摘要：

Insect mating is a time consuming process,so mating may have an adverse effect on its resistance to stresses. Ophraella communa is a specific predator of ragweed,under normal circumstances,adults had stronger ability of bearing starvation and high temperature. In order to clear the effect of mating on the tolerance to environmental stresses in O. communa adults,the effects of mating on the resistance to starvation and thermal tolerance were studied. The result showed that in the absence of food,mating only once,the mating has strong effect on female＇s longevity,but females（ 8. 4 d ± 0. 1 d） have significantly lower resistance to starvation than age-matched virgin females（ 10. 8 d ± 0. 1 d）. At high temperature,regardless of feeding or not,mating will obviously enhance the heat resistance of male and female adults,especially for females（ The survival time will be 6. 15 d ± 0. 14 d,4. 95 d ± 0. 13 d for mated females and virgin females respectively when ragweed was provided; without food,the ratios will be 5. 55 d ± 0. 13 d,4. 81 d ± 0. 11 d for mated females and virgin females respectively）. Therefore,the starvation tolerance of O. communa females reduced after they copuloted, but copuation enhanced heat resistance of the beetle adults significant.