Fumigant toxicity of some plant essential oils to Ephestia kuehniella Zeller (Lepidoptera:Pyralidae)

Authors : Yasin ALPKENT, Özdemir ALAOĞLU, Hüseyin ÇETİN

Pages : 115-125

View : 11 | Download : 9

Publication Date : 2013-07-03

Article Type : Research Paper

Abstract :The fumigant activity of essential oil vapours distilled from lavender insert ignore into journalissuearticles values( Lavandula angustifolia Mill.);, mint insert ignore into journalissuearticles values( Mentha spicata L.);, coriander insert ignore into journalissuearticles values( Coriandrum sativum L.); and sage insert ignore into journalissuearticles values( Salvia officinalis L.);were tested against eggs insert ignore into journalissuearticles values(1 day-old); and larvae insert ignore into journalissuearticles values(20-25 days-old); of Ephestia kuehniella Zellerunder 27± 2°C %65 ±5 RH conditions. Treatments were repeated three times; each replicate was conducted with 20 egss or 20 larvae. Exposure times were 24, 48 and 72 hours. Fumigant toxicity was changed according to oils, dose exposure times and biological stage of the pest. It was found that the sensitivities of the eggs and larvae varied according to LC50 values. While the eggs were more sensitive than the larvae against to the lavender oil; in case of coriander and sage oils larvae were found to be more sensitive than eggs. Sensitivity levels of eggs and larvae were similar in mint oil.The lavender oil caused over 95% mortality for the eggs at dose of 225 μl/l air in 72 hours. The effectiveness of the mint essential oil was 100 % to the eggs at a dose of 250 μl/l air in 72 hours. While mortality rate of the eggs was 98% at the dose of 125 μl/l of coriander oil, it was 82% at dose of 75 μl/l air of the sage oil.
Keywords : Ephestia kuehniella, uçucu yağ, fumigant etki, un güvesi