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- W2741543154 abstract "Essential oil was isolated from leaves of Ruta graveolens (Arudha in Sinhala) by hydro-distillation to evaluate its repellent and toxic activities against the rice weevil, Sitophilus oryzae. Essential oil at concentrations of 50, 100, 150 and 200 µl/ 10 ml acetone were tested against one week old adults using un-infested white raw rice as the food medium. Repellency rate of insects increased with the increase in dose and 100% adult repellent activity was observed at the highest dose (200 µl) after 30 minutes. Relatively high level of repellency was also recorded at the lowest dose (50 µl) amounting to 89%. In contact and fumigation toxicity bioassays, highest doses of the oil tested (150 and 200 µl) were extremely effective in inducing 100% mortality of weevils within an hour and over 90% within half an hour compared to that of the control which gave no mortality. The efficacy in respect to contact and fumigation toxicity after one hour was found to be 93% and 91% respectively at the lowest dose. Present study reveals that essential oil present in leaves of R. graveolens has very high potential as a repellent, contact toxicant and a potent fumigant in controlling S. oryzae infestations in pest management programmes." @default.
- W2741543154 created "2017-08-08" @default.
- W2741543154 creator A5080858369 @default.
- W2741543154 date "2016-01-01" @default.
- W2741543154 modified "2023-09-24" @default.
- W2741543154 title "EFFICACY OF ESSENTIAL OIL OF RUTA GRAVEOLENS LEAVES AGAINST SITOPHILUS ORYZAE (LINNAEUS) AS A BIORATIONAL PESTICIDE IN POST-HARVEST PEST MANAGEMENT" @default.
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