New insecticide delivery method for the control of Sitophilus zeamais in stored maize |
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| Affiliation: | 1. Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Departamento de Química, Cátedra de Química Orgánica, Av. Vélez Sarsfield 1611, X5016GCA, Córdoba, Argentina;2. Instituto Multidisciplinario de Biología Vegetal (IMBIV), CONICET-Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, X5016GCA, Córdoba, Argentina;1. Department of Sustainable Agriculture and Biodiversity Ecosystem Management, School of Life Sciences and Bioengineering, The Nelson Mandela African Institution of Science and Technology (NM –AIST), P.O. Box 447, Arusha, Tanzania;2. Centre for Research, Agriculture Advancement, Teaching Excellence and Sustainability in Food and Nutrition Security (CREATES), Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, Tanzania;3. Tanzania Agricultural Research Institute (TARI –Ilonga), P.O.Box 33, Kilosa, Tanzania;1. IRTA, Ctra. Cabrils km 2, E-08348, Cabrils, Barcelona, Spain;2. IRTA, Finca Camps i Armet, E-17121, Monells, Girona, Spain;1. Institute of Pesticides and Environmental Protection, Banatska 31b, 11080, Belgrade, Serbia;2. University of Ljubljana, Biotechnical Faculty, Department of Agronomy, Jamnikarjeva 101 SI, 1000, Ljubljana, Slovenia;3. Faculty of Technology, University of Novi Sad, Bulevar Cara Lazara 1, 21000, Novi Sad, Serbia;1. Universidade do Estado de Santa Catarina - UDESC, Centro de Ciências Agroveterinárias, Departamento de Agronomia, Lages, Santa Catarina, 88520-000, Brazil;2. Universidade Federal do Paraná - UFPR, Setor de Ciências Biológicas, Centro Politécnico, Curitiba, Paraná, 81530-000, Brazil;1. Durable Crop Research Department, Nigerian Stored Products Research Institute, P.M.B. 1489, Ilorin, Nigeria;2. Department of Zoology, University of Ibadan, Ibadan, Nigeria;3. Department of Entomology and Plant Pathology, Oklahoma State University, 127 Noble Research Center, Stillwater, OK, 74078-3033, USA;4. Vestergaard Frandsen SA, Chemin Messidor 5-7, 1006, Lausanne, Switzerland;5. Department of Agricultural and Environmental Engineering, University of Ibadan, Ibadan, Nigeria |
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| Abstract: | Maize kernel deterioration caused by the action of insects has led to an urgent need to develop new control methods against the maize weevil, Sitophilus zeamais, one of the major pests found in silo bags during the storage of maize. Here, we evaluated the insecticidal efficiency of plasticized and unplasticized cotton matrices (deliveries), loaded with R-(+)-pulegone, (−)-carvone, 2-decanone and trans-2-hexenol against S. zeamais. R-(+)- pulegone was the only compound that produced weevil mortality. Plasticized delivery loaded with R-(+)-pulegone achieved a 90% mortality on the 12th day, with mortality values recorded of above 96% over the course of 30 days. R-(+)-pulegone from plasticized delivery was released more slowly compared to unplasticized delivery. Moreover, delivery loaded with R-(+)-pulegone did not show phytotoxicity in maize kernels. Hence, due to its effectiveness against the weevil and the lack of phytotoxic activity against maize kernels, plasticized delivery loaded with R-(+)-pulegone represents a promising material for S. zeamais control. However, large-scale studies are needed in order to evaluate its potential use in grain storage systems. |
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| Keywords: | Maize kernels Cotton matrix Delivery Plasticizer Insect control |
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