Some observations on the biology of Callosobruchus analis (Fabr.) (Bruchidae: Coleoptera)

Pajni, H.R.; Jit, S.

Research Bulletin of the Panjab University, Science 27(3-4): 141-146


ISSN/ISBN: 0555-7631
Accession: 000750445

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Callosobruchus analis (F.) is a common pest of stored pulses in India and usually occurs in association with C. maculatus (F.) and C. chinensis (L.). Information is given on the life-history and habits of C. analis from studies of a population reared in the laboratory on seeds of Vigna radiata (Phaseolus aureus). The bruchid had about 8 generations a year. The larvae were voracious, but feeding by the adults was not observed. Infestation spread rapidly owing to the short life-cycle and high female fecundity. The life-cycle was shortest, fecundity, fertility and adult emergence highest, and larval mortality lowest, in July-August. In the discussion of adult habits, particular attention is drawn to mating and grooming behaviour, to the poor flight ability but good walking ability of the adults, and to the habit of older adults of sheltering in empty bean shells shortly before death. Parasites observed were Dinarmus vagabundus (Timb.), Uscana mukerjii (Mani) and Pyemotes ventricosus (Newp.) (Pediculoides ventricosus).