21 Ara 2024 Cumartesi
Biopesticidal efficacy of Terminalia chebula Retzius and Solanum viarum Dunal against Callosobruchus analis Fabricius (1781) (Coleoptera: Bruchidae)
Abstract : Pulses constitute the major source of protein (approx. 20-30%) which is higher than that found in any other cereal. But pulses are adversely affected by insect- pests. Among all insect-pests, bruchids (dhoras) are the major pests in stored pulses. Callosobruchus analis F. is very common pest of gram as gram is the most preferred host for oviposition and development. Enormous and indiscriminate use of chemical pesticides, leads to many issues such as pest resurgence, development of resistant strains. Therefore, best alternative is the use of plant-based pesticides to control the pests. Therefore, the present work has been carried out to evaluate the biopesticidal efficacy of T. chebula and S. viarum against Callosobruchus analis infesting Cicer arietinum (chickpea). Extracts of fruits and leaves of both plants and seeds of S. viarum prepared in acetone and methanol and employed at 5, 10 and 20% concentrations with three replicas each. Bio-pesticidal efficacies of extracts of these botanicals were observed on mortality of pests, egg laying ability and adult emergence. 20% acetone extract of T. chebula fruits show 100% adult mortality on 8th day of treatment and at the same concentration 100% adult mortality was observed on 10th day in case of acetone extracts of S. viarum fruits. Results shows that acetone extracts of fruits of both the plants were very much effective to increase adult mortality of C. analis as compared to other treatments.