Effects of supplementing different sugars on the longevity and fecundity of Telenomus remus adults
Sugars are essential nutrients for the growth,development,and reproduction of insects.To enhance the reproductive efficiency and biocontrol ability of the egg parasitoid,Telenomus remus,the effects of feeding on different concentrations of glucose and sucrose(10％,15％,and 20％,respectively)on fecundity,longevity of T.remus and emergence rate of offspring were determined.The results indicated that female adults of T.remus fed with either 20％glucose or sucrose exhibited the longest longevity when eggs of Spodoptera litura or S.frugiperda were as the host.Additionally,glucose demonstrated a more pronounced prolongation effect on female lifespan compared to sucrose.The highest egg production was observed in individuals fed with either 10％glucose or sucrose.Furthermore,the effect of glucose on enhancing fecundity was significantly higher than that of sucrose when using S.litura eggs as hosts.However,sucrose outperformed glucose in promoting oviposition when exploiting S.frugiperda eggs as hosts.Moreover,sucrose proved more effective than glucose in elevating the eclosion rate and female ratio in the progeny of T.remus when reared on the same host type.This study underscored the significant prolongation of T.remus lifespan with the supplementation of 20％glucose,and the dramatic enhancement of parasitoid fecundity through sucrose augmentation.These insights provide valuable references for improving the large-scale production and application of the egg parasitoid T.remus in biological control.
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