Toxicity of coumaran to stored products beetles |
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| Affiliation: | 1. Department of Mechanical Engineering, National Institute of Technology, Warangal-506004, India;2. Scientist ‘G’, DRDL Hyderabad, India;1. Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA), Estación Experimental Agroindustrial Obispo Colombres (EEAOC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. William Cross 3150, C.P. T4101XAC Las Talitas, Tucumán, Argentina;2. Estación Experimental Agroindustrial Obispo Colombres (EEAOC), Argentina;3. Instituto Nacional de Tecnología Agropecuaria (INTA), Ruta Nac. Nro. 9 km 636, C.P. 5988 Manfredi, Córdoba, Argentina;1. National Institute of Technology, Warangal, 506004, India;2. Research Scholar, National Institute of Technology, Warangal, 506004, India;3. Professor, National Institute of Technology, Warangal, 506004, India;1. Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China;2. Department of Preventive Medicine and Health Management & College of Pharmacy, Hebei University, Baoding 071002, China |
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| Abstract: | The fumigant activity of coumaran was tested against mixed-age cultures of the rice weevil (Sitophilus oryzae L.), the lesser grain borer (Rhyzopertha dominica F.), the rust-red flour beetle (Tribolium castaneum Herbst), saw-toothed grain beetle (Oryzaephilus surinamensis L.) and flat grain beetle (Cryptolestes ferrugineus Stephens). T. castaneum was tolerant to coumaran, for total population extinction was achieved in 72 h exposure at 50 μg/L dose only. In contrast all developmental stages of O. surinamensis, C. ferrugineus and R. dominica were quite susceptible 100% mortality was attained at < 50 μg/L doses in 24 or 72 h exposure. Further results showed that T. castaneum, generally tolerant pest to fumigants and R. dominica, a predominant stored grain pest in India, could be controlled by coumaran. The findings indicate that, coumaran is good source for alternate to methylbromide for effective control of stored grain insect pests. |
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| Keywords: | Coumaran Fumigant toxicity Mixed-age culture Stored product beetles |
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