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Antifeedant Activity and Toxicity of Eugenol and Thymol Derivatives<br />

against Red Palm Weevils (Rhynchophorus ferrugineus, Olivier)<br />

Adults<br />

Tan Jia Xian<br />

Supervisor: Assoc. Prof. Dr. Wahizatul Afzan binti Azmi<br />

Co-Supervisor: Dr. Asnuzilawati binti Asari<br />

Bachelor of Applied Science<br />

(Biodiversity Conservation and Management)<br />

School of Marine and Environmental Sciences<br />

The red palm weevil (RPW), Rhynchophorus ferrugineus is a severe pest of<br />

palm species globally. In Malaysia, RPW managements are depend on synthetic<br />

insecticide, which caused negative effects to environment and human health.<br />

To solve the problem, plant essential oils with eco-friendly properties can be<br />

used as substitution. Eugenol and thymol derivatives that extracted from the<br />

clove and thyme respectively were evaluated in the laboratory for their effects<br />

on RPW adults. 700, 1000 and 1500ppm of these compounds were used in the<br />

toxicity test for nine days. The antifeedant effect were also studied using<br />

concentration at 500, 700 and 1000ppm. Results showed that both eugenol<br />

and thymol derivatives had toxicity effect against RPW adults, but eugenol<br />

derivatives were more effective due to lower LC50 and LT50 value. However,<br />

there were no antifeedant effect against RPW adults. Eugenol derivatives is<br />

more suitable to against RPW and should considered as bio-control agent.<br />

1773 | UMT UNDERGRADUATE RESEARCH DAY 2018

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