[01] Adelakun Folasade Mary, Department of Crop, Soil and Pest, Federal University of Technology, Akure, Nigeria. [02] Oni Mercy Olayinka, Department of Crop, Soil and Pest, Federal University of Technology, Akure, Nigeria. [03] Adebayo Raphael Abiodun, Department of Crop, Soil and Pest, Federal University of Technology, Akure, Nigeria.

Anisaldehyde is an active compound found in the essential oil of Clausena anisum-olens. Contact toxicity of anisaldehyde on adult S. oryzae under laboratory conditions were evaluated in the Department of Crop, Soil and Pest Management, FUTA. The effects of the compound on the activities of the CAT, SOD, and GPx were reported vividly. The homogenized separation of the samples was prepared for the adult S. oryzae and exposed to 10, 20, 30, 40, and 50μl of the oil extract dosages of 2% concentration. Untreated rice served as a control. Results shows that anisaldehyde was effective against the survival of S. oryzae. High mortality of adult S. oryzae, percentage weight loss and high inhibition rate were recorded. The activities of the active dosage increases with an increase in the time of exposure. Lethal dose of 14.76 and 35.36μl of anisaldehyde is recommended to achieve 50 and 95% mortality of the insect within 24h post-treatment. All the treatments were significantly (p<0.05) different from the control irrespective of the period of exposure. The findings also revealed that activities of the antioxidant enzymes increase above that of the control treatment with increase in dosage of the compound but drastically reduced at higher dosages. Based on the results of this study, anisaldehyde is recommended as viable bioinsecticides in integrated pest management strategies for rice storage by farmer.

Anisaldehyde, S. oryzae, Inhibition Rate, Antioxidant Enzymes

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