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      Development and Life History ofSitophilus zeamais(Coleoptera: Curculionidae) on Cereal Crops

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      Advances in Agriculture
      Hindawi Limited

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          Abstract

          The maize weevil, Sitophilus zeamaisMotschulsky (Coleoptera: Curculionidae), is one of the most destructive pests of stored cereals. Knowledge of the life history and biology is important to the development of an integrated pest management program. Investigation was carried out on developmental biology of S. zeamaison four main cereal crops, maize, rice, sorghum, and millet, under laboratory conditions. Egg incubation, oviposition periods, and larval instar development were not different significantly among the food hosts. Number of eggs laid varied significantly among the cereal grains; mean fecundity was highest on maize ( 67.2 ± 3.16 ) and lowest on millet ( 53.8 ± 0.17 ). Number of immature (larva and pupa) and adult stages varied significantly among the cereal grains. There exist four larval instars with a varied mean head capsule width, with a mean total instar larval developmental period of 23.1, 22.2, 22.2, and 21.6 d on maize, rice, sorghum, and millet, respectively. There was linear relationship and significant correlation between the stages of larval development and head capsule width. The mean developmental period from egg to adult varied, being highest on maize (34.7 d) and lowest on sorghum (33.5 d).

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          The Number of Molts of Lepidopterous Larvae

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            Biorational approaches to managing stored-product insects.

            Stored-product insects can cause postharvest losses, estimated from up to 9% in developed countries to 20% or more in developing countries. There is much interest in alternatives to conventional insecticides for controlling stored-product insects because of insecticide loss due to regulatory action and insect resistance, and because of increasing consumer demand for product that is free of insects and insecticide residues. Sanitation is perhaps the first line of defense for grain stored at farms or elevators and for food-processing and warehouse facilities. Some of the most promising biorational management tools for farm-stored grain are temperature management and use of natural enemies. New tools for computer-assisted decision-making and insect sampling at grain elevators appear most promising. Processing facilities and warehouses usually rely on trap captures for decision-making, a process that needs further research to optimize.
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              External sex differences in stored-products Coleoptera

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                Author and article information

                Journal
                Advances in Agriculture
                Advances in Agriculture
                Hindawi Limited
                2356-654X
                2314-7539
                2016
                2016
                : 2016
                :
                : 1-8
                Article
                10.1155/2016/7836379
                b698b627-66b7-4f72-9c45-beb7b30523bc
                © 2016

                http://creativecommons.org/licenses/by/4.0/

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