Evaluation of Insecticidal Activity of Plant Extracts against Three Insect Pests
2008
Park, J.H. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea), E-mail: [email protected] | Ryu, K.Y. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea) | Jee, H.J. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea) | Lee, B.M. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea) | Gho, H.G. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea)
Insecticidal activity of 20 plant species against adults of Myzus persicae, female adults of Tetranychus urticae, and 2∨nd or 3∨rd instar larvae of Plutella xylostella was evaluated in this study. Thirteen plant extracts showed over 80% acaricidal activity to T. urticae at the concentration of 1%, while Capsicum annuum (hot-pepper seed), Inula helenium, and Acorus calamus revealed 82.8-86.2% acaricidal activities at 0.5%. Insecticidal activities of the plant extracts to M. persicae and P. xylostella were relatively low compare to the mite. Among the plant extracts, C. anuum and Brassica juncea revealed 48.6% and 42.9% respectively insecticidal activities to the aphid at the concentration of 0.5%. Extracts of C. anuum and Jeffersonia dubia provided 55% and 50% insecticidal activity against P. xylostella at 1%. And, the highest antifeeding activity of the insect was observed in the J. dubia extract as 79.4%. Results indicated that some plant extracts including hot pepper seed could be used as potential botanical pesticides for organic farming.
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