Effect of flowers and leaves extracts of icevine, Cissampelos pareira L. in insecticidal and anti-feedant activities on aphids

Abstract

Aphids suck the juices from the plant part causing the leaves to yellow and fall. There are released the honeydew covered on the leaves of plants, causing black mold disease that affect the plant photosynthesis process. Large infestations can reduce plant yields. The objective of this study is to investigate the insecticidal and anti-feedant activity of flowers and leaves of icevine, Cissampelos pareira L. on aphids. The insecticidal and anti-feedant activity of ethanol extracts from icevine extract were tested on cowpea aphid, Aphis craccivora Koch. Various concentrations of crude extract [0.5, 1, 1.5 and 2% (w/v)] were compared with imidacloprid and control were applied in laboratory and case test. The treatments were arranged in a completely randomized design (CRD) and with 20replication. The results indicated that the icevine extract was found to be capable of killing aphids, although its efficiency was lower compared to imidacloprid. The anti-feedant test found that icevine extract reduced the infestation and duration of aphids feeding on the indigo leaves. Increased concentration of icevine extract resulted in a decrease in the duration of aphid feeding.