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Biological activity of natural phytoecdysteroids from Ajuga iva against the sweetpotato whitefly Bemisia tabaci and the persea mite Oligonychus perseae by Radi Aly; Uzi Ravid; Jackline Abu-Nassar; Ilan Botnick; Galina Lebedev; Shira Gal; Hammam Ziadna; Guy Achdari; Evgeny Smirov; Ayala Meir; Murad Ghanim is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Biological activity of natural phytoecdysteroids from Ajuga iva against the sweetpotato whitefly Bemisia tabaci and the persea mite Oligonychus perseae about?

## 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 phyt

Who reads Biological activity of natural phytoecdysteroids from Ajuga iva against the sweetpotato whitefly Bemisia tabaci and the persea mite Oligonychus perseae?

Author

Radi Aly; Uzi Ravid; Jackline Abu-Nassar; Ilan Botnick; Galina Lebedev; Shira Gal; Hammam Ziadna; Guy Achdari; Evgeny Smirov; Ayala Meir; Murad Ghanim

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1526-498X)

Published

2011

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)