ABSTRACT

Coccinellids beetles have significant importance as biological control tools because of its potential to consume many soft body insects especially the aphid on which both its larvae and adult feed vigorously. The studies carried out in the Bioassay Laboratory, Plant Pathology Research Institute, Faisalabad to determine the predatory efficiency of two ladybird beetles, Coccinella septempunctata (seven spotted beetle) and Propylea quttuordecimpunctata (fourteen spotted beetle) against Rhopalosiphum padi (bird cherry-oat aphid) at room temperature of 22o C to 25oC. The results recorded indicated that a single larva of Coccinella septempunctata consumed significantly more aphids (56) per day as compared to single larva of Propylea quttuordecimpunctata (32.25) per day. Similarly, the adult of Coccinella septempunctata was found to be most efficient than the adult of Propylea quttuordecimpunctata by consuming 54.57 and 34.37 aphids per day respectively. Therefore, concluded that both larva and adult of Coccinella septempunctata have higher rate of predation than Propylea quttuordecimpunctata. Moreover, it also observed that the incubation period was 4 days in both the species while the total life cycle from egg to adult lasted for 28 days in Coccinella septempunctata and26 days in Propylea quttuordecimpunctata. Keywords: R.padi, C.septempunctat, P.quttuordecimpunctat, biological control, efficacy comparison
Publication date: 01/03/21

https://ijbpas.com/pdf/2021/March/MS_IJBPAS_2021_5406.pdf

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https://doi.org/10.31032/IJBPAS/2021/10.3.5406