It has a long, thin snout, and elbowed antennae. Danho, M., Gaspar, C., Haubruge, E. 2002. during the 1st 8 weeks when maize is planted in the field. Development of Sitophilus zeamais and Tribolium castaneum in whole, cracked, and ground pearl millet. Both species can hybridize. [7] Ragged holes in individual grains, similar to damage caused by the rice weevil and granary weevil, may indicate infestation. Nardon, C, Nardon, P. 2002. = `ԚÙAÒ(„ó —gw‰ßçlÀHòÙFíûÚT~À:Ô®Os0cöU°FAm­ŸhFON]ýf@ñ÷ÎDÈGñ¶¿e3KTá. Mason, L.J. Key words: Zea mays L., Sitophilus zeamais M., Vegetal oils. Journal of Stored Products Research, 38(3): 259–266. Peng, W.K., Lin, H.C., Wang, C.H. "First confirmation of the distribution of rice weevil, USDA study on temperature management of the maize weevil, USDA study on contest behaviour of maize weevil larvae when competing within seeds, African Journal of Biotechnology: Laboratory evaluation of four medicinal plants as protectants against the maize weevil,, Short description is different from Wikidata, All Wikipedia articles needing clarification, Wikipedia articles needing clarification from January 2014, Creative Commons Attribution-ShareAlike License, Punctures on pronotal dorsum typically nearly circular, rarely elliptical, Longitudinally elliptical punctures on pronotal dorsum, Pronotal punctures are nearly equally spaced apart, and pronotum typically has no median puncture-free area (rarely has a narrow puncture-free median zone), Pronotal punctures are separated by a flat, median, longitudinal puncture-free zone, More than 20 pronotal punctures along the approximate midline, running from neck to scutellum (not reliable for individuals not reared on corn, which are typically smaller), Less than 20 pronotal punctures along the approximate midline, running from neck to scutellum, Scutellar elevations typically farther apart compared to their longitudinal length, Scutellar elevations typically closer together compare to their longitudinal length, Scutellar elevations typically extend longitudinally approximately halfway down the scutellum, Scutellar elevations typically extend longitudinally approximately more than halfway down the scutellum, Proepimera meets behind the fore coxae and has a barely discernible notch along the posterior edge at the site of the meeting point, Proepimera meets behind the fore coxae and along the posterior edge, has a distinct notch along the posterior edge at the site of the meeting point, Male aedeagus has two dorsal, longitudinal grooves, Male aedeagus is smooth and shiny on the dorsal surface, Epipharyngeal rods of larvae tapering apically, Epipharyngeal rods of larvae have virtually the same width throughout, Lateral lobes of Y-shaped sclerite of female genitalia tapering and pointed at apex, Lateral lobes of Y-shaped sclerite of female genitalia not tapering and rounded at apex, More than 5 sensory organs at the tip of the labial palps of larvae, Less than 5 sensory organs at the tip of the labial palps of larvae. (2002) in a choice experiment with hybrid maize varieties. 1973. [8] This small, brown weevil has four reddish-brown spots on the wing covers (elytra). Meikle, W.G., Holst, N., Markham, R.H. 1999. Durante mucho tiempo se consideró que era la misma especie que el gorgojo del arroz, aunque de tamaño ligeramente mayor. The complete development time for the life cycle of this species averages 36 days. Environmental Entomology, 28(5): 836–844. & N;Á¶iYˆ)DåD5«– Key words: Sitophilus zeamais, efficacy, Eucalyptus grandis, Tagetes minuta, maize, organoleptic. Grain Insect Fact Sheet, E-237-W: Rice, Granary, and Maize Weevils Sitophilu soryzae (L.), S. granarius (L.), and S. zeamais (Motsch). (2003). One study recorded, 5 weeks after infestation, the emergence of 100 adults per kg per day. Anonymous. 2009b. The most obvious sign of infestation is the emergence of adults. (Coleoptera, Dryophthoridae). Tolerance A gain st M aize Weevil, Sitophilus zeamais (M otsch.) [7] Only one egg is laid inside each grain. As S. zeamais larvae feed on the interior of individual grains, often leaving only the hulls, a flour-like grain dust, mixed with frass is evident. Diversity Analysis and Breeding for Maize Weevil (Sitophilus zeamais Motschulsky) and Larger Grain Borer (Prostephanus truncatus Horn) Resistance in Productive Maize Germplasm in [6] The plug quickly hardens, and leaves a small raised area on the seed surface. weevils, Sitophilus zeamais, a major pest of stored maize in Brazil, has led to the occurrence of resistance. [1], "Greater Rice Weevil (Sitophilus zeamais)",, Control of Sitophilus zeamais Mots., 1958 and Sitophilus oryzae (L., 1763) weevils (Coleoptera, Curculionidae) in stored rice grain (Oryza sativa l.) with insecticide pirimiphos methyl (Actellic 500 CE). The genitalic structure of hybrids is unknown. ž¨Ù¦œðcŒOÔf‘;Ys¾y¦ÁI8§¤F µÕMvL Æ2!¾ It is also widely distributed throughout agricultural areas of northern Australia. [6] In large stores of grain, an increase in temperature may be detected. DNA identification of two laboratory colonies of the weevils, Sitophilus oryzae (L.) and S. zeamais Motschulsky (Coleoptera: Curculionidae) in Taiwan. The type of food consumed by the larvae influences the size of the adult (3.9-4.9 mm on corn, 3.0-4.6 mm on wheat, 2.9-4.3 mm on rice, 2.7-3.2 on rough rice, and 2.3-3.9 mm on shelled rice). Maceljski, M., Korunić, Z. It can breed in crops with a moisture content of a much wider range than S. oryzae, and has been found in fruit, such as apples during storage. The maize weevil (Sitophilus zeamais), known in the United States as the greater rice weevil,[1][2] is a species of beetle in the family Curculionidae. [7] This species has also been recorded in Canada, in the provinces of Ontario and Quebec,[6] and has been intercepted at ports, but is not well established there. [6], The maize weevil and the rice weevil look very much alike but external features can be used to differentiate the vast majority of adults. The S. zeamais homologue of the Drosophila para VGSC was identified using degenerate primers and sequenced. grown,[2] including: Polynesia, Argentina, Brazil, Burma, Cambodia, Greece, Japan, Morocco, Spain, Males are then attracted to this pheromone. Annales de la Societe, Meagher, R.L., Reed, C., Mills, R.B. Although the maize weevil cannot readily breed in finely processed grains, it can easily breed in products such as macaroni and noodles, and milled cereals that have been exposed to excessive moisture. [9][10][11][7], S. zeamais occurs throughout warm, humid regions around the world, especially in locations where maize is ), This page was last edited on 16 September 2020, at 11:07. The maize weevil affects the crop before harvest and multiplies further after storage (Demissie et al., 2008a). 1982. When the egg hatches into a white, legless grub, it will remain inside and begin feeding on the grain. [7], The maize weevil commonly attacks standing crops, in particular, maize before harvest, and is also commonly associated with rice. A possible indication of infestation is grain, when placed in water, floating to the surface.
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