Repellent and Growth-Inhibiting Effects of Turmeric Oil, Sweetflag Oil, Neem Oil, and “Margosan-O” on Red Flour Beetle (Coleoptera: Tenebrionidae)

Abstract

In a food preference chamber, fewer adults of red flour beetle (Tribolium castaneum Herbst) settled in rice grain treated with 100, 500, or 1,000 ppm of the oil of turmeric Curcuma longa (L.), sweetflag Acarus calamus (L.), or neem Azadirachta indica A. Juss, or "Margosan-O" (a commercial neem-based insecticide). Repellency increased with increasing concentrations of the oils and Margosan. In another choice test, filter paper strips treated with turmeric oil or sweetflag oil at 200, 400, or 800 JLg/cm 2 repelled insects during the first2 wk; thereafter, repellency decreased more rapidly than with neem oilor Margosan-O. Tribolium castaneum adults fed wheat flour, which had been treated with the test materials at 200 ppm, produced fewer and underweight larvae, pupae, and adults compared with the control.

Evaluation of Orange Peel Citrus Sinensis (L) As a Source of Repellent, Toxicant and Protectant against Zabrotes Subfasciatus (Coleoptera: Bruchidae)

“…After each test the "Y" glass tube and the gas washing bottles were washed with water, rinsed with acetone and dried at 80 o C for 1h. Each treatment was replicated four times and percentage repellency (PR) values were computed using the methods of Jilani et al (1988) as:…”

The efficacy of essential oil of Alpinia calcarata (Rosc.) and its major constituent, 1,8-cineole, as protectants of cowpea against Callosobruchus maculatus (F.) (Coleoptera: Bruchidae)

“…Liu and Ho (1999) reported that essential oil of cardamom was more repellent to T. castaneum (Herbst) than to S. zeamais (Motsch). Jilani et al (1988) found that extract of neem leaves and seeds (5 g L -1 ) repelled T. castaneum. Elhag (2000) pointed out that the highest repellency of C. maculatus was found in R. stricta leaves (82.0%), A. indica seeds (76.8%), H. bacciferum aerial parts (59.2%) and citrus peels (58.6%).…”

Repellency of Ethanolic Extract of Some Indigenous Plants Against Tribolium confusum (du val))(Coleoptera: Tenebrionidae)

“…Plant products have several uses in insect control. These products have also been studied for acute toxicity, antifeedant, or repellent, attractant, and fumigant effects, as well as inhibiting reproduction of many pest species [3; 4], products from several floral species have been demonstrated to act as repellents, toxicants and antifeedants against a number of Coleoptera that attack stored products [5] conducted insect repellency assay using extracts of different plants on stored product pests. Oils of many plants have also been reported as repellent and toxic chemicals for the management of stored grain insect pests [6].…”