Effects of Selected Plants Against Rice Weevil (Sitophilus oryzae)

Nur Syamiila  Mohd Arafah; Chia Yong Jun; Sharizainor Sharina  Mohamed Shariff; Nor Qhairul Izzreen  Mohd Noor; Nazikussabah Zaharudin

doi:10.55230/mabjournal.v52i4.d044

Authors

Nur Syamiila Mohd Arafah Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, Persiaran Tun Khalil Yaakob, 26300 Gambang, Pahang, Malaysia
Chia Yong Jun Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, Persiaran Tun Khalil Yaakob, 26300 Gambang, Pahang, Malaysia
Sharizainor Sharina Mohamed Shariff Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, Persiaran Tun Khalil Yaakob, 26300 Gambang, Pahang, Malaysia
Nor Qhairul Izzreen Mohd Noor Faculty of Food Science and Nutrition, Universiti Malaysia Sabah, Kota Kinabalu 88450, Malaysia
Nazikussabah Zaharudin Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, Persiaran Tun Khalil Yaakob, 26300 Gambang, Pahang, Malaysia

Keywords:

Antifeedant, anti-progeny, plants, repellency, rice weevil

Abstract

Rice weevils (Sitophilus oryzae) have caused significant damage and losses in rice storage. The use of chemical pesticides to control them has had negative environmental effects and limited efficacy. To address this issue, natural plant-based insect-control alternatives were investigated. This study aimed to assess the effectiveness of (Pandanus amaryllifolius), kaffir lime leaves (Citrus hystrix), and “asam gelugor” (Garcinia atroviridis) in repelling, inhibiting feeding, and reducing the offspring of rice weevils. Plant samples were extracted using the soxhlet extraction method, and the crude extracts were concentrated using a rotary evaporator. The extract solutions were then tested for their effects on rice weevils. The results showed that pandan leaves were the most effective, with a repellency percentage of 46.67% and a better anti-progeny effect of 2.175%. Kaffir lime leaves had no effect on rice weevils, while asam keping only showed an anti-progeny effect of 6.525%. The study revealed that low concentrations (0.002 - 0.006 g/mL) of insecticides from pandan extracts could provide a repellency effect against rice weevils. Therefore, plant extracts from Pandanus can be used as botanical insecticides to manage S. oryzae infestations.

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