The antifeedant properties of bio-oil from Cupressus sempervirens against rice weevil (Sitophilus oryzae) compared to that of Myrrh and Frankincense oils

Wahba, Trandil F.; Aly, Hesham M.; Hassan, Noura

doi:10.21608/ejar.2023.192485.1341

Cited by 1 publication

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“…This showed that plant extracts are efficient as an antifeedant agent who can subsequently help to protect the stored rice grains and other post-harvest products. This study was also supported by Wahba (2020) who described that the increase in concentrations can increase the antifeedant activity where the highest concentration (2000 mg/g) is the best concentration to reduce the appetite of rice weevils to consume the grains. A study reported by Omar et al (2007) on antifeedant activities of terpenoids on rice weevils also suggest that pests treated with the highest concentration resulted in the lowest weight loss of the stored grain.…”

Section: Contact Activitysupporting

confidence: 67%

Wood Vinegar as an Alternative Insecticide in Controlling Rice Weevil, Sitophylus oryzae (Coleoptera: Curculionidae)

Othman,

Elias,

Zainalabidin

2023

Adv Agric Food Res J

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Rice production faces many challenges including damages due to pest infestation in storage after harvest. Stored rice grains are often under threat and damage from pests such as rice weevil which resulted in reduction of the quality and quantity. Application of chemical insecticides helps to control this pest, however, it gives negative impacts to the environment and human health. Application of plant-based insecticides including the use of wood vinegar can become an alternative to the conventional method. This work describes the effectiveness of wood vinegar as bioinsecticide to inhibit the rice weevil’s activity by assessing the repellency, mortality and antifeedant activity at different concentration of 50, 100, 150 and 200 rpm. Wood vinegar showed high repellency of 98.3% towards rice weevils at 200 ppm after 5 hours of exposure times. Increased in concentration affects in increased mortality with highest number of 97% recorded at 200 ppm. The lethal concentration (LC) of wood vinegar was calculated to be 77.62 ppm. Antifeedant activity resulted in reduction of weight loss in stored rice with lowest reduction of 2% at 200 ppm. This promising result reflects the ability of wood vinegar as insecticidal agents in management and control of stored-grain pest.

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Section: Contact Activitysupporting

confidence: 67%