ScienceDirect ® is a registered trademark of Elsevier B.V.First confirmation of the distribution of rice weevil, © 2018 National Science Museum of Korea (NSMK) and Korea National Arboretum (KNA), Publishing Services by Elsevier.ScienceDirect ® is a registered trademark of Elsevier B.V. A pair of stout mandibular jaws is present at the extremity of the rostrum. Nowadays, it is believed to be most widely distributed among the known insect pests of the world as through shipments of grains have reached all over the world. The adults formed after pupation bores its way out of the grains. However, this pest is particularly common in warm countries. Description.
In Korea, the classification of the Sitophilus weevil group occurring in stored grains has been confused, resulting in its misidentification in most references reporting Sitophilus oryzae (Linnaeus). The rice weevil is a stored product pest which attacks seeds of several crops, including wheat, rice, and maize. Apart from rice, it also feeds upon wheat, com, jaw, barley etc.
Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students.ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Feeble sexual dimorphism exists. The size of the newly bored adult weevil is directly proportional to the size of the grain in which the larval period has been spent.
Immediately after the emergence, the adult weevils are ready for breeding. Frequently, is search of suitable site in the grain, a mother weevil may bore at several parts of a grain but only one egg is laid down in a single grain. The duration of life cycle of rice weevil and number of generations completed in a year depends upon the weather conditions, like temperature and humidity. Notable species include the rice weevil, wheat weevil, and maize weevil. The tiny, white, fleshy, legless grubs with yellowish- brown head and biting jaws bores down into the grain, feeding on its starchy content and hallowing it out leaving the shell intact. Peer review under responsibility of National Science Museum of Korea (NSMK) and Korea National Arboretum (KNA).We use cookies to help provide and enhance our service and tailor content and ads. The life span of the adult weevil is 4-5 months. In fact, it is the commonest pest that one encounters in all kinds of stores. The larvae are more destructive as they feed voraciously on the content of the grain but leave the shell of the grain intact. It is a serious pest not only of paddy and rice but almost of all cereals and their products.
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