Sieving has been used as a method of removing adult weevils, but it is very labour intensive. Maize Insect Pest. Malathion: i) as a spray; treat grain and do not use for food within 90 days of treatment; ii) as a dust; treat grain and do not use for food within 14 days of treatment. Maize weevil, Sitophilus zeamais; adult side view. The maize weevil is very similar to the rice weevil, Sitophilus oryzae (see Fact Sheet no. Photo 4. Spread with movement of stored grain; on the wing - the weevils are strong flyers. http://www.agrilifebookstore.org/Pantry-and-Fabric-Pests-in-the-Home-p/e-486.htm, Filed Under: EntoExtension, Insect Tagged With: grain feeder, weevil. This organic concentrate is fast acting and safe enough to use on corn, tomatoes and more with just one day to harvest. Before storage: CHEMICAL CONTROLIf pesticides are needed, use the following:Routine hygiene treatments. Attacks sound grains, leaving large cavities, and allowing secondary invasions by insects, mites, and fungi. Phosphine: Used as a fumigant; grain is covered by a tarpaulin or in other ways sealed for the duration of the fumigation. This fact sheet is a part of the app Pacific Pests and Pathogens. Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community. Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community. Remove old kernels, and sweep floors, walls, doors, and vents to collect seeds, grain powder and dust, and burn them before storing the new harvest. Malathion: apply to walls, floors, and inside of bins used to store the grain. These insects have chewing mouthparts. The scientific name of the weevil … The maize weevil (Sitophilus zeamais) is a species of beetle in the family Curculionidae. Both are internal feeders, which means the larva develops inside whole grain kernels. Characteristics: The flour weevils have forewings that have a leathery and hard configuration, uniting towards the dorsal surface mid line. Maize weevil, Sitophilus zeamais, clearly showing four light reddish to yellowish spots at the corners of the wing case. Welcome to the Department of Entomology at Texas A&M University! It lays eggs in the cotton balls and the larvae eat the cotton when come out. The maize weevil ( Sitophilus zeamais) is a species of beetle in the family Curculionidae. Keep grain storage rooms, sheds, houses, or "cribs" clean. Locate the source and destroy it by wrapping the foods in heavy plastic bags or in sealed containers, and burn or bury deeply in the soil. Pyrethrins: Used as a grain protectant (sometimes with piperonyl butoxide). The mobile application is available from the Google Play Store and Apple iTunes. Larvae develop through several stages (instars) inside the grain kernels and also pupate inside the kernel. It is recorded from Australia, Fiji 1, New Caledonia, Papua New Guinea, Solomon Islands, and Tonga. The larva like most weevil grubs are more or less “C-shaped”. Host range – Maize, sorghum, ragi and bajra. http://keys.lucidcentral.org/keys/v3/eafrinet/maize_pests/key/maize_pests/Media/Html/Sitophilus_zeamais_Motschulsky_1855_-_Maize_Weevil.htm. Maize (greater grain) weevil (339) - Worldwide distribution. January Month Agriculture Current Affairs 2020. The ear of the maize is a modified spike and there may be 1–3 per plant. In larger infestations of stored grain warehouses and silos, remediation will require emptying the infested areas, cleaning and the use of residual insecticide. Maize Weevil image provided by Pat Porter. Sitophilus zeamais. Photo 2  Georg Goergen, IITA-Benin. Scientific Name. Treatment of grains for human consumption or for animal feed [make sure the product is labelled for use on rice, maize and small grains (barley, oats, wheat)]. Females lay up to 150 eggs placed in holes chewed into the grain and plugged with a gelatinous substance. Look for the characteristic large emergence holes in the grain with irregular edges. Infestations can start in the field.