n African Entomology - Prey consumption efficiency and fecundity of the ladybird beetle, Kovàr (Coleoptera: Coccinellidae) feeding on the giant brown bark aphid, (Cholodkovsky) (Hemiptera: Lachninae)




Laboratory studies were conducted to determine the efficiency of Kovàr (Coleoptera: Coccinellidae) against (Cholodkovsky) (Hemiptera: Lachninae) and compared against Harris (Hemiptera: Aphidinae). Feeding on had a significant effect on predation rate by either fourth stage larvae or adults of . The developmental period of reared on was significantly shorter than those reared on ( = 51.45, d.f. = 1.19, = 0.05). Larvae and adults of reared on showed a significantly greater mortality than those on ( = 27.29, d.f. = 2, = 0.05). Furthermore, the aphid species has an effect on body weight and fecundity of . These results demonstrated that is not recommended as a biological control agent of in Tunisia.


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