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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] It is also a major pest of peanuts.
Prostephanus truncatus is commonly referred to as larger grain borer (LGB) with reference to the related Rhyzopertha dominica, which is relatively smaller, and referred to as the lesser grain borer. P. truncatus is about 6 mm (0.24 in) long as compared to 3 mm (0.12 in) long in R. dominica .
Rhyzopertha dominica (Fabricius) - lesser grain borer; Sinoxylon anale (Lesne) Xylion cylindricus Macleay; Xylobosca bispinosa (Macleay) Xylodeleis obsipa Germar; Xylopsocus gibbicollis (Macleay) Xylothrips religiosus (Boisduval) Xylotillus lindi (Blackburn) Species found in the United Kingdom. Bostrichus capucinus; Bostrychoplites cornutus ...
The lesser grain borer has a dark coloured cylindrical structure with the head concealed. [4] When lesser grain borer eggs are laid, they are laid outside the grain, however they mature inside the shell of the seed which can take up to 6 weeks if the temperature is cooler, with the adult borers not living for longer than two months.
Elasmopalpus lignosellus, the lesser cornstalk borer, was described by Philipp Christoph Zeller in 1848. [1] It is found from the southern United States to Mexico, Central America and South America (Colombia, Venezuela, Brazil, Peru, Argentina and Chile).
It is known commonly as the lesser mealworm and the litter beetle. It has a cosmopolitan distribution , occurring nearly worldwide. It is known widely as a pest insect of stored food grain products such as flour , and of poultry-rearing facilities and it is a vector of many kinds of animal pathogens .
They feed on the starchy content of the wood as they are unable to digest cellulose. Young larvae chew their way along the grain of sapwood but older larvae may tunnel across the grain. They may come near to the surface but do not break through. When the larvae are ready to pupate, they build pupal chambers close to the surface. [1]
The larvae, called roundheaded borers, bore into wood, where they can cause extensive damage to either living trees or untreated lumber (or, occasionally, to wood in buildings; the old-house borer, Hylotrupes bajulus, is a particular problem indoors).