Insecticidal activities of crude extracts and phospholipids from Chenopodium ficifolium against melon and cotton aphid, Aphis gossypii |
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Authors: | Quang Le Dang Gee Young Lee Yong Ho Choi Gyung Ja Choi Kyoung Soo Jang Myung Soo Park Ho Seob Soh Young Hee Han Chi Hwan Lim Jin-Cheol Kim |
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Institution: | 1. Green Chemistry Division, Korea Research Institute of Chemical Technology, Yuseong-Gu PO Box 107, Daejeon 305-600, Republic of Korea;2. Environmental Agriculture Research Division, Gyeonggi-Do Agricultural Research and Extension Services, Hwaseong, Gyeonggi-Do, 445-784, Republic of Korea;3. College of Agriculture and Life Science, Chungnam National University, Yuseong-Gu, Daejeon 305-764, Republic of Korea |
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Abstract: | Several organic solvent extracts of Chenopodium ficifolium were tested for their insecticidal activity against melon and cotton aphid, Aphis gossypii, on cucumber plants. Both methanol and ethanol extracts, at 5000 μg ml−1, were highly active giving over 80% control. The other crude extracts displayed moderate or weak insecticidal activity giving control in the range of 16–69%. Two phospholipids were isolated as insecticidal active substances from C. ficifolium. Their chemical structures were identified as 1-palmitoyl-2-(3-trans)-hexadecenoyl-sn-glycero-3-phosphoglycerol and 1-palmitoyl-2-linoleoyl-3-glycerophosphocholine by GC–MS, EDS, mass and NMR spectral analyses. Both compounds displayed a dose-dependent mortality of A. gossypii. Furthermore, the liquid formulation that was obtained by partitioning with n-hexane from the methanol extract of C. ficifolium controlled melon and cotton aphid on cucumber plants effectively. These results indicate that extracts of C. ficifolium have potential for development as botanical insecticides for controlling A. gossypii infesting cucumber plants. |
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Keywords: | Aphis gossypii Chenopodium ficifolium Cucumber Insecticidal activity Phospholipids |
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