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- Title
Biological activity of natural phytoecdysteroids from Ajuga iva against the sweetpotato whitefly Bemisia tabaci and the persea mite Oligonychus perseae.
- Authors
Aly, Radi; Ravid, Uzi; Abu-Nassar, Jackline; Botnick, Ilan; Lebedev, Galina; Gal, Shira; Ziadna, Hammam; Achdari, Guy; Smirov, Evgeny; Meir, Ayala; Ghanim, Murad
- Abstract
BACKGROUND: Ecdysteroids are steroid hormones that control moulting and govern several changes during metamorphoses in arthropods. The discovery of the same molecules (phytoecdysteroids) in several plant species displayed a wide array of rather beneficial agricultural impact. Many representatives of the genus Ajuga plants contain phytoecdysteroids with a 5β-7-ene-6-one system exhibiting physiological activities in insects. RESULTS: By means of chromatographic (silica gel column, TLC) and LC-MS, two major ecdysteroids (20-hydroxyecdysone and cyasterone) have been isolated and identified from Israeli carpet bugle Ajuga iva (L.) Schreber (Lamiales: Lamiaceae) plants. Ajuga iva extract fractionated on the silica gel column yielded two fractions that showed high activity against the sweetpotato whitefly Bemisis tabaci and the persea mite Oligonychus perseae. A dose of 5 mg AI L−1 of the purely identified A. iva ecdysterone significantly reduced fecundity, fertility and survival of these pests, while commercial 20-hydroxyecdysone at the same dose had lesser effects. CONCLUSION: The results demonstrate considerable efficacy of natural phytoecdysteroids against major agricultural pests, and suggests that these materials should be considered for potential development of friendly control agents. Copyright © 2011 Society of Chemical Industry
- Subjects
SWEETPOTATO whitefly; BEMISIA; PERSEA; AJUGA; LAMIACEAE; PEST control
- Publication
Pest Management Science, 2011, Vol 67, Issue 12, p1493
- ISSN
1526-498X
- Publication type
Article
- DOI
10.1002/ps.2203