Rice Weevil


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Related to Rice Weevil: Grain Weevil, Saw toothed grain beetle

Rice Weevil

 

(Calandra, or Sitophilus, oryzae), a beetle of the family Curculionidae; a dangerous pest of grain, mainly rice and grain products. The body is 2-3.5 mm long and brown in color. Native to India, the rice weevil spread with rice through the entire globe. In the USSR it does the greatest damage in the Caucasus, Ukraine, and the republics of Middle Asia. The insect usually inhabits warm granaries but is also found in the fields (Caucasus). The rice weevil yields as many as seven generations in a year. Both the adults and the larvae are destructive, feeding on rice, rye, wheat, barley, corn, buckwheat, husked millet, and oats, as well as on products obtained from these grains. Grain damaged by the rice weevil is marked by a decrease in weight, nutritional value, and seed quality.

For a discussion of control measures seeCROP PESTS.

References in periodicals archive ?
tabacum was highly lethal to a lesser grain borer (17.33+-1.19SE) and rice weevil (15.33+-0.90SE) after 72 h.
Microstructure of mandibulate mouthparts in the greater rice weevil, Sitophilus oryzae (Coleoptera: Curculionoidae).
anisopliae and DE product Protect-It[TM] against the rice weevil is in agreement with previous works (Kavallieratos et al.
The rice weevil (A), lesser grain borer (B) and red flour beetle (C) were selected by the majority of survey respondents as insects causing problems in stored rice.
The aim of this research was to evaluate the temperature significance on the effectiveness of selected biorational insecticides against the rice weevil in wheat grains.
thapsus extracts were studied for insecticidal activity using red flour beetle (Tribolium castaneum), its larvae and rice weevil (Sitophilus oryzae) at doses 1, 5, 10, 25, 50, 75, and 100 mg of extract.
Laboratory bioassays were carried out to examine the toxicity and repellency of a crude methanol extract of Duabanga grandiflora against adult rice weevil, Sitophilus oryzae.
In either case, damage to stored grain by the lesser grain borer, rice weevil, red flour beetle, and rusty grain beetle costs the U.S.
The chairperson of the House of Representatives committee on agriculture and food on Monday labeled as 'irresponsible' the National Food Authority's (NFA) claim that the sacks of rice infested with rice weevil (bukbok) are still safe for consumption after fumigation.
They have used these extracts to control the most common stored-product insects--the rice weevil, lesser grain borer, sawtoothed grain beetle, and red flour beetle.
The National Food Authority (NFA) on Sunday clarified that the sacks of rice infested with rice weevil (bukbok) are still safe for consumption once the fumigation process is done.