Abstract: The repellent effect of six plant essential oils against Khapra beetle larvae was studied. Furthermore, the efficacy of the most potent repellent oil in protecting wheat seeds against infestation was evaluated. Results showed Clove oil as the most potent repellent against the insects (-60%), While Fennel oil showed an attractive effect (20%). The essential oils can be organized in descending order according to the repellent effect: Clove > Camphor> Cardamon> Onion, Fennel Clove oil showed an efficacy in protecting wheat seeds against infestation, as mortality percentage increased with increasing concentrations and contact time period; it reached 91.67% at concentration 4 for 48 hrs exposure. High concentrations also protected seeds from damage; protection was 100% at 4 concentration. The seeds damage percentage decreased with increased oil concentrations. The shidy also investigated the effect of larvae on wheat seed germination; as germination increased with higher Clove oil concentration. The study showed the high efficacy of Clove oil in protecting wheat seeds against pest infestation.
Keywords: Khapra beetle, plant oils, Toxicity, Trogoderma granarium, Stored product insects.
Title: Evaluation of some plant oils against larvae of Khapra beetle (Trogoderma granarium E.) (Coleoptera: Dermestidae)
Author: Dr. Fatehia Nasser Gharsan
International Journal of Life Sciences Research
ISSN 2348-313X (Print), ISSN 2348-3148 (online)
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