Studies on the capability of Cheilomenes lunata (Fabricius) (Coleoptera: Coccinellidae) to prey on the cowpea aphid, Aphis craccivora Koch (Homoptera: Aphididae) in Nigeria.
In screenhouse experiments in Nigeria on cowpeas (cv. Ife Brown), consumption of the various instars of Aphis craccivora by 1st- and 4th-instar larvae and adults of Cheilomenes lunata was studied. Early aphid instars were consumed in significantly greater numbers than later ones in no-choice and free-choice trials. The population developing in 1 week from 9 adult apterae of A. craccivora on 3 cowpea plants was completely controlled by a pair of C. lunata within the following week.