Sitona

Sitona

 

a genus of beetles of the family Curculionidae (weevils). The body length is 3–7.5 mm, and the coloration is gray or brown. These beetles have developed wings and a short, thick snout. Species of this genus are found wherever legumes are grown. Of the 45 species that are found in the USSR, Sitona lineatus, S. crinitus, S. inops, S. humeralis, sweetclover weevil (S. cylindricollis), and S. sulcifrons do the most damage to leguminous grains and perennial leguminous grasses. The beetles eat leaves. The larvae damage the nitrogen-fixing tubers and roots of the legumes. Countermeasures include the early planting of annual legumes, the use of early and mid-season ripening varieties, the liming of acid soils and the application of nitrugin to increase tuber development, early harvesting followed by immediate plowing of the fields, and the treatment of the seeds and planted areas with insecticides.

REFERENCES

Beliaev, I. M. Gorokhovye sloniki. Moscow, 1934.
Petrukha, O. I. Kluben ’kovye dolgonosiki roda Sitona Germ, fauny SSSR, vrediashchie bobovym kul’turam. Moscow, 1969.
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Germany foreign minister Guido Westerwelle shakes hands with South Sudan ambassador in Berlin Sitona Abdalla Osman as Sudan foreign minister Ali Karti looks on (German Foreign Ministry Website)
Variation in isoesterase profiles of geographical populations of Beauveria bassiana (Deuteromycotina: Hyphomycetes) isolated from Sitona weevils (Coleoptera: Curculionidae).
Scientists found the beetle scybalicus oblongiusculus and the weevil sitona cinerascens, not seen in Britain since the 20s, on a derelict oil plot due to become a business park in Canvey Island, Essex.
The Sitona weevil, less than a millimetre long, is believed to feed on white clover which is valued by farmers as feed for livestock and for its ability to enrich soil with nitrogen.