Comparison of the impact of host eggs from rice meal moth Corcyra cephalonica and Chinese tussar moth Antheraea pernyi on the artificial rearing efficiency of the pine caterpillar egg parasitoid Trichogramma dendrolimi
To improve the efficiency of artificial propagation of pine caterpillar egg parasitoid Tricho-gramma dendrolimi,we measured several developmental indicators of T.dendrolimi,including develop-mental duration,eclosion rate,female ratio,individual size,and the number of emerged wasps per egg.We also assessed parasitism ability indicators,such as host searching time,parasitic rate,and the con-tents of major nutrients(trehalose,protein,and triglyceride)in the eggs of rice meal moth Corcyra cephalonica and Chinese tussar moth Antheraea pernyi.The results showed that using A.pernyi eggs as hosts resulted in offspring wasps with a longer developmental duration but larger individual size,higher eclosion rate,female ratio,and a greater number of emerged parasitoid wasps per egg.Offspring reared on A.pernyi eggs demonstrated stronger parasitism ability on both types of host eggs,whereas those reared on C.cephalonica eggs exhibited weaker parasitism ability on A.pernyi eggs.Although the three nutrient contents per unit weight were higher in C.cephalonica eggs,the total nutrient contents were greater in a single A.pernyi egg.This suggests that the higher nutrient content per egg and the larger space for movement within A.pernyi eggs are the main reasons for the inproved propagation efficiency of T.dendrolimi on A.pernyi eggs compared to C.cephalonica eggs.
alternative hostegg parasitoidTrichogramma dendrolimiartificial propagation
万方数据
维普
