In Mitteleuropa vermögen sie aber ausschließlich in beheizten Gebäuden zu überleben. Lebensweise. They possess a long slender snout and cannot fly. The average lifespan is about one year. CURCULIONOIDEA Latreille, 1802 CURCULIONIDAE Latreille, 1802 DRYOPHTHORINAE Schönherr, 1825. an einer Vielzahl von Getreidekörnern vor. Reis-Kornkäfer leben in den Tropen im Freiland und befallen hier Getreidekörner auf den Äckern. Female wheat weevils lay between 36 and 254 eggs and usually one egg is deposited in each grain kernel. SITOPHILUS Schönherr, 1838. Life cycle: The life cycle of the weevil is highly dependent on temperature and relative humidity (r.h.). The grain weevil (Sitophilus granarius) appears to have evolved to feed on grains stored by ants and rodents and thus was preadapted to make the transition to grains stored by humans [35]. Sitophilus granarius (Linnaeus, 1758) Suborder: Superfamily: Family: Subfamily: Tribe: Genus: POLYPHAGA Emery, 1886. The larvae feed inside the grain until pupation, after which they bore a hole out of the grain and emerge. They are rarely seen outside of the grain kernel. All larval stages and the pupal stage occur within the grain. Life Cycle: The granary weevil, Sitophilus, granarius is closely related to rice weevil, Sitophilus oryzae in habits, hosts and life history. However, since colonizing human-stored grains, S. granarius is likely to have experienced strong selection for traits that facilitate survival in the very different conditions of granaries. Adult granary weevil (Sitophilus granarius) Courtesy of Degesch Inc. There are small oval pits on the elytra in contrast to round pits found in rice-weevil. The maize weevil (Sitophilus zeamais), known in the United States as the greater rice weevil, is a species of beetle in the family Curculionidae.It can be found in numerous tropical areas around the world, and in the United States, and is a major pest of maize. Sitophilus granarius . RHYCHOPHORINI Schönherr, 1833. Sitophilus granarius (Linnaeus, ... Life cycle. Originally native to eastern Mediterranean regions this species has become established throughout … It is quite similar in appearance to the rice- weevil, but lacks the light reddish spot on the wing covers. Der Kornkäfer (Sitophilus granarius) ist einer der bedeutendsten Getreide- und Vorratsschädlinge. Description The granary weevil (Sitophilus granarius) is dark brown-black in colour and is about 2.5 - 5 mm in length. The development from egg to adult grain weevil depends on temperature and relative humidity, and is possible between 11 and 30 ºC. In small grains, such as millet or milo maize, weevils are small in size, however in grains such as corn they are larger. Die einzelnen Sitophilus-Arten besitzen zwar Vorlieben für jeweils bestimmte Körner, kommen aber ggf. Besonders für landwirtschaftliche Betriebe, die Getreide lagern, und Mühlen ist ein Schädlingsbefall ein ernstzunehmendes Problem, da die Schädlinge sich sehr schnell vermehren, großen Schaden anrichten und eine gesamte Ernte zerstören können. Similar species: Sitophilus oryzae and Sitophilus zeamais.

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