Observations on Callosobruchus analis (F.) in Indonesia, including a key to storage Callosobruchus spp. (Col., Bruchidae).
Callosobruchus analis has been reported to be the most common bruchid found during surveys of pests of stored pulses in Java and southern Sumatra, Indonesia. The morphology of C. analis from Indonesia is described. The Indonesian specimens have a moderately long tooth on the inner carima of the hind femur, instead of the small or minute tooth of normal strains, but are in all other respects identical to the normal form of the species. The 'long-toothed' form is included in a modified key to all Callosobruchus species found on stored dried pulses. The Indonesian samples of C. analis were exclusively associated with green gram [Vigna radiata] and white soya and C. analis was the only bruchid found infesting white soya. C. analis was not found in East Java but became progressively more common to the west, accounting for 56% of all Callosobruchus records in West Java and being the only bruchid found in stores in southern Sumatra. It is suggested that C. analis can compete successfully with C. chinensis and C. maculatus towards the west of the area surveyed and this conclusion was supported by evidence of competitive displacement in laboratory colonies.