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Rating levels infestations sitophilus spp (coleoptera : curculionidae) from millet one hand and on the Hand corn, on the differents formulations of corn.

In Senegal, among the cereal crops, corn (Zea mays L.) is the second major cereal. Indeed, it is well established that conservation of crops ensures the availability of food resources is one of the key factors of food security in a country. But these foodstuffs are commonly attacked by some beetles (Sitophilus oryzae, Sitophilus zeamais) during storage causing considerable qualitative and quantitative losses. Order to know the impact of the change in the oviposition substrate on Sitophilus spp development capacity, controlled infestations Sitophilus zeamais (Coleoptera, Curculionidae) from corn one hand and Sitophilus oryzae (Coleoptera, Curculionidae) from millet secondly on the different formulations of corn (whole, husked, broken and flour) were made. These experiments were performed at a relative humidity range between 41-67% and temperatures ranging from 28.5 to 31 ° C. The development of Sitophilus spp has been followed after infestation controlled whole corn grains first and then husked, then broken and finally processed into flour. The development cycle was followed spawning until the appearance of adults for determining the various biodemographic parameters. The results showed that overall the nature of the substrate influences the development and future of the weight of Sitophilus zeamais and Sitophilus oryzae. Also these two insect are primary pests of corn, able to develop on whole corn, husked and broken corn except corn flour. But, it important to note that Sitophilus oryzae from millet is hardly develops on the whole corn. Thus, to contain the infestation of Sitophilus zeamais and Sitophilus oryzae in the corn, it is necessary to store it after processing into flour.


Auteur(s) : Guèye A.C., Diome T., Thiaw C. Sembène M.
Pages : 59-71
Année de publication : 2016
Revue : International Journal of Plant, Animal and Environnemental Sciences.
N° de volume : 6 (3)
Type : Article
Mise en ligne par : SEMBENE Mbacké