ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Enhanced fumigant toxicity of allyl acetate to stored-product beetles in the presence of carbon dioxide

B.C. Leelaja, Y. Rajashekar, P. Vanitha Reddy, Khamrunissa Begum and S. Rajendran

Journal of Stored Products Research, Volume 43, Issue 1, 2007, Pages 45-48

2007

บทคัดย่อ

Toxicity of allyl acetate (5–25 mg/l doses) to mixed-age cultures of stored-product beetles including Cryptolestes ferrugineus, Lasioderma serricorne, Oryzaephilus surinamensis, Rhyzopertha dominica, Sitophilus oryzae and Tribolium castaneum in the presence of carbon dioxide (CO₂) (10% and 20%) with a 48-h exposure period was studied in the laboratory at 27±2 °C. Depending o­n dosage and the insect species, the fumigant toxicity of allyl acetate was enhanced by CO₂. At most of the allyl acetate+CO₂ combinations, increased mortality was observed in C. ferrugineus, O. surinamensis and S. oryzae. In L. serricorne and T. castaneum, which are tolerant to allyl acetate, higher mortality due to CO₂ was achieved at selected dose combinations o­nly (e.g. 15 mg/l allyl acetate+20% CO₂). Significant increase in mortality of R. dominica (the most susceptible species to allyl acetate) exposed to allyl acetate in the presence of CO₂ was not evident except at the lower dose of 5 mg/l allyl acetate+CO₂ that caused 31.7% mortality. The mortality data show that CO₂ could be used as an adjuvant for allyl acetate.

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