Comparison of some fitness parameters of two aphid parasitoids Diaeretiella rapae (Mcintosh) and aphidius colemani (Viereck) (Braconidae: Hymenoptera)
2000
Qayyum, A. (National Agricultural Research Centre, Islamabad (Pakistan). Integrated Pest Management Inst.)
D. rapae and A. colemani are two parasitoid species differ in their life time performance when reared on the same aphid species. Differences in development time, potential fecundity, longevity, generation time were considerable. The intrinsic rate of population increase was greater for D. rapae (0.223) than for A. colemani (0.183). Using rm an index of fitness, D. rapae was the superior species in terms of parasitoid fitness of biological control, because its generation time was shorter than that of A. colemani.
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