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maize weevil larvae

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Contest behaviour of maize weevil larvae when competing within seeds. Journal of Stored Products Research, 6: 351–352. [7], The maize weevil commonly attacks standing crops, in particular, maize before harvest, and is also commonly associated with rice. Youdeowei A. The maize weevil is found in all warm and tropical parts of the world. Grain Insect Fact Sheet, E-237-W: Rice, Granary, and Maize Weevils Sitophilu soryzae (L.), S. granarius (L.), and S. zeamais (Motsch). Family: Curculionidae This activity was undertaken as part of the BioNET-EAFRINET UVIMA Project (Taxonomy for Development in East Africa). Ceylon. The pupal case can be reddish brown to nearly black, depending on age. Rice Weevil: This weevil has small round pits on the surface of the thorax (although miline is usually free of pits), four red to yellow markings on the forewings, and is able to fly. Please contact Tammy Luck at Published by Elsevier Ltd. All rights reserved. The maize weevil, Sitophilus zeamais (Motschulsky) Male x 48. Two or three larvae may develop on kernel of corn, but from other grains only one adult can be produced. MSU is an affirmative-action, equal-opportunity employer, committed to achieving excellence through a diverse workforce and inclusive culture that encourages all people to reach their full potential. (2013) studied the effects of adding maize weevil larvae to the diet on performance parameters. Maize weevils, for a long time were referred to as a larger strain or race of the rice weevil, but are now recognized as a distinct species. This provides the only visible evidence that the kernel is infested.

[3] This species attacks both standing crops and stored cereal products, including wheat, rice, sorghum,[4][5][6] oats, barley, rye, buckwheat,[6] peas, and cottonseed. Eighty to 200 eggs are deposited on the outside of the kernel, grooves or holes made by other insects and the larvae bore into the kernel. It can be found in numerous tropical areas around the world, and in the United States, and is a major pest of maize. from Sitophilus oryzae (L.) (Coleoptera: Cuculionidae). Anne M. Akol, Makerere University; Maneno Y. Chidege, Tropical Pesticides Research Institute; Herbert A.L. (Coleoptera, Dryophthoridae). By continuing you agree to the use of cookies. Maize weevil Sitophilus zeamais (Motsch. Contribution to the morphology and ecology of Sitophilus zeamais Motsch. ©Gary Alpert, Harvard University,, Maize damaged by Sitophilus zeamais. Start over again from the insect identification keys page. Both adults and larvae are cold-hardy. Is abundantly distributed in tropical environments throughout the world, where it is able to infest standing crops, Is less common in temperate zones and, in Canada, has only been found in Ontario and Quebec, Tends to aggregate within grain bulks, making populations difficult to detect. It is black-brown in coloring although it can be red-brown shortly after adult emergence. Proctor, D.L. The behavioural process and the ecological outcome of competition were assessed in two strains of the maize weevil. The impact of grain quantity on the biology of Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae): oviposition, distribution of eggs, adult emergence, body weight and sex ratio.

Oklahoma State Univ. The larvae will pupate while inside, then chew a circular exit hole,[1] and emerge as an adult beetle. The best method of controlling this pest is to locate the grain or food in which they are feeding and remove it. Maize weevil larvae are soft, white grubs with no legs. In maize weevils, Sitophilus zeamais, few adults emerge per seed regardless of the number of eggs laid, which may arise from scramble competition, if the optimum egg density (i.e. Wallingford, UK. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Adults emerge through a small round hole in the kernel. However, maize weevil or lesser grain borers totally suppress Angoumois grain moth populations.

Calandra chilensis Philippi and Philippi, 1864;Calandra platensis Zacher, 1922;Cossonus quadrimacula Walker, 1859, Phylum: Arthropoda; Class: Hexapoda (Insecta); Order: Coleoptera; Family: Curculionidae. grown,[2] including: Polynesia, Argentina, Brazil, Burma, Cambodia, Greece, Japan, Morocco, Spain, The most obvious sign of infestation is the emergence of adults. CAB International Publishing. INTRODUCTION Climatological conditions in Louisiana generally are

1971. BioNET-EAFRINET Regional Coordinator:, Sitophilus zeamais Motschulsky, 1855 - Maize Weevil, Coombs CW, Billings CJ, Porter JE, (1977). from Sitophilus oryzae (L.) (Coleoptera: Cuculionidae). Weevils can be found infesting a variety of grain and food materials.

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