Plant oils as fumigants and contact insecticides for the control of stored-product insects

Viabilidade de sementes de feijão caupi após o tratamento com óleo essencial de citronela (Cymbopogon winterianus Jowitt)

“…Os estudos sobre o potencial das espécies vegetais visando obter óleos essenciais como métodos de controle de patógenos e pragas no tratamento de sementes vêm crescendo, como os inseticidas botânicos, pós, extratos botânicos e óleos essenciais de origem vegetal (Shaaya et al, 1997).…”

Effect of mahogany Khaya senegalensis seed oil in the control of Callosobruchus maculatus (Fab.) (Coleoptera: Bruchidae) on stored cowpea.

“…The high cost of synthetic pesticides, the danger of pesticide misuse and of toxic residues in food has resulted in a rapid development and assessment of botanicals as alternatives for chemical control of stored product pests (SHAAYA et al 1997). In many storage systems, use of fumigants is the most economical tool for managing stored grain insect pests; however, storage pests are fast developing resistance to phosphine (BELL & WILSON 1995;CHAUDHRY 1995).…”

“…Most constituents of the essential oils are monoterpenoids that are secondary plant chemicals. The monoterpenes are of interest to industrial markets because of other potent biological activities in addition to their toxicity to insects (KUBO et al 1994;SHAAYA et al 1997).…”

“…This method is convenient and inexpensive for the protection of stored seeds in households and on small farms (SHAAYA et al 1997). Essential oils have a low toxicity to warm-blooded animals, high volatility, and toxicity to stored-grain insect pests (REGNAULT-ROGER & HAMRAQUI 1993;SHAAYA et al 1991).…”

Antifeedant activity and toxicity of some plant essential oils to Colorado potato beetle, Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae)

“…One possible way to reduce the high consumption of synthetic insecticides is the application of botanical insecticides, generally considered to be environmentally and medically safe (Pavela 2007;Dayan et al 2009). Among them essential oils are the bestknown substances and act as fumigants, insecticides, repellents, and antifeedants (Shaaya et al 1997). Chemical constituents of essential oils grouped as monoterpenes (hydrocarbons and oxygenated derivatives), sesquiterpenes (hydrocarbons and oxygenated derivatives), and aliphatic compounds (alkanes, alkenes, ketones, aldehydes, acids, and alcohols) provide characteristic odours and belong to different genera (Isman et al 2001;Kim & Ahn 2001;Kordali et al 2007).…”