Chilades pandava(Lepidoptera:Lycaenidae)is a notorious leaf-eating pest of Cycas spp.Understanding the reproductive behaviors and rhythms of this pest can provide the essential information for developing the population management strategies.The emergence,mating and oviposition behaviors and rhythms of C.pandava were observed under semi-natural environment in this study.The results showed that emergence of both male and female adults mainly occured from 5:00 to 18:59,and reached the peak from 9:00 to 12:59.Courtship and mating behaviors dominated by males were observed during the day,with the peak from 9:00 to 15:59.The mating duration was(82.85±59.76)min.Following successful grasp of mate,the males mated with females in a tail-to-tail position;female adults laid eggs more than one time in a day.The peaking oviposition period occurred from 8:00 to 8:59 and from 14:00 to 15:59,and the females laid eggs on the tender leaves of host plants,with 10-282 eggs per female.
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