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Adult wheat weevils are about 3–5 mm (0.12–0.20 in) long with elongated snouts and chewing mouth parts. [2] Depending on the grain kernels, the size of the weevil varies. In small grains, such as millet or grain sorghum, they are small in size, but are larger in maize (corn). [3] The adults are a reddish-brown colour and lack distinguishing ...
Weevils also are known to infest oats, rice, corn, corn meal, sorghum, and cereal, so you might want to apply the same practice you do to your flour as those items as well.
The maize weevil and the rice weevil look very much alike but external features can be used to differentiate the vast majority of adults. However, the only reliable features to distinguish adults of both species are the genitalia (see table below). Both species can hybridize. The genitalic structure of hybrids is unknown. [9] [10] [8] [7]
The sole species, Rhyzopertha dominica, is known commonly as the lesser grain borer, American wheat weevil, Australian wheat weevil, and stored grain borer. [3] It is a beetle commonly found within store bought products and pest of stored cereal grains located worldwide. [ 4 ]
An adult emerges from inside a grain of rice. Adult rice weevils are able to fly, [6] and can live for up to two years. Females lay 2–6 eggs per day and up to 300 over their lifetime. The female uses strong mandibles to chew a hole into a grain kernel after which she deposits a single egg within the hole, sealing it with secretions from her ...
In the US, the legislation regulating the presence of insects in grain is the Official United States Standards for Grain, Subpart A—General Provisions, which stipulates that grain is considered infested if it contains "live weevils" or "other live insects injurious to stored grain"; and in Canada the corresponding legislation is the Canadian ...
It is a pest of grain, particularly maize (Zea mays). The insect is native to Europe, originally infesting varieties of millet , including broom corn . The European corn borer was first reported in North America in 1917 in Massachusetts , but was probably introduced from Europe several years earlier. [ 2 ]
Most weevils feed on plants as larvae and adults, and they include important pests of cultivated plants that chew holes in fruits, nuts and other parts. [4] The long rostrum possessed by most adult weevils is used by females to help lay eggs (oviposit) inside plant tissue. [ 5 ]