Antifeedant and toxic effects of leaf extracts of Syzygium cumini L., Ocimum basilicum L., Luffa aegyptica Mill., Eichhornia crassipes Mart., Tamarindus indica L., Terminalia catappa L., Limonia acidissima L., Murraya koenigii L., Breynia retusa (Dennst.)., Jatropha curcas L., Tectona grandis L., Momordica charantia L., Mangifera indica L., Ricinus communis L., and the seed extract of Madhuca i...

Rhodojaponin-III is a nonvolatile botanical grayanoid diterpene compound, which has antifeedant and oviposition deterrence effects against many kinds of insects. However, the molecular mechanism of the chemoreception process remains unknown. In this study, the important role of BdorCSP2 in the recognition of Rhodojaponin-III was identified. The full length cDNA encoding BdorCSP2 was cloned from...

To validate the potential as added-value resources of Asteraceae and Labiatae species of Argentinean semi-arid lands, we have selected 13 of their major terpenoids belonging to several chemical classes and tested their insect antifeedant and toxic activity on the herbivorous insects Spodoptera littoralis and Leptinotarsa decemlineata. The antifeedant effects of the test compounds were structure...

The insecticidal and antifeedant activity of extracts derived from different parts of the mangrove tree Rhizophora mucronata (Rhizophoraceae) Lam. is reported. The 70% ethanol extracts of leaves, bark, stem wood and pith were tested for toxicity against adults of the desert locust Schistocerca gregaria (Forskal), the 2 instar larvae of Aedes aegypti (L.) and the 1 instar larvae of the brine shr...

no-choice feeding tests. Pressed paneling mats made from Alaska-cedar or western hemlock exhibited antifeedant properties. Waxes, resins, and additives used in manufacturing these mats imparted resistance to R. fEauipes.

Dual choice bioassays were used to evaluate the antifeedant property of essential oil and methanolic extract of Alpinia galanga (L.) (locally known as lengkuas) against two species of termites, Coptotermes gestroi (Wasmann) and Coptotermes curvignathus (Holmgren) (Isoptera: Rhinotermitidae). A 4-cm-diameter paper disc treated with A. galanga essential oil and another treated with either methano...

Insecticidal and antifeedant activities of acetone extract of Casimiroa edulis (Rutaceae) leaf were screened against 4 instar larvae of Spodoptera littoralis. Crude extract had LC50 value of 79.47μg/cm and SC50 of 88.97 μg/cm. Seven fractions were then collected from the extract by silica gel column chromatography (eluted by different solvent systems). Four of these fractions recorded percent s...

A concise synthesis of (1S*,3R*,6R*)-1-hydroxy-7(14),10-bisaboladien-4-one, an antifeedant against the locust Locusta migratoria isolated from the Japanese cedar Cryptomeria japonica, was achieved by starting from 4-hydroxy-2-cyclohexenone.

Botanicals act not only as insecticides but also function as antifeedants, oviposition deterrents and ovicides. The present investigation reports on the antifeedant property of leaf components of Curculigo orchioides, Evolvulus alsinoides, Phyllanthus deblis, Swertia corymbosa and Zanthoxylum limonella. Solvent residues of these leaf components obtained from different solvent extracts dissolved...