Ecological status of host range and polymorphism in Bruchidae.

摘要: Obse.rvatn.onsmade on the bionomics of 6 species storage and field bruchl.dsduring last 25 years have revealed that different speci.ea show wide variations an their host-seed range. The bruchids are usually polyphagous multivoltine, undergoing unl.nterrupteddevelopment stored seeds. host range indl.vl.dualspecies is rather variable each fails to breed one or more common pulses. incompatibility such pulses determl.nedby presence in thel.rseeds certain non protein amino acids, lectins other secondary substances which afford protection against bruchid attack. species, contrary, generally monophagous, univoltine attack green pods hosts. Host speci f i.ca t.y l.S decided by LndaspenaahLe feeding adults pollen nectar host. bruchl.ds consrderabIe variation colour pattern bodies characterise morphs, resulting distinct dl.morphism/polymorphism species. These morphs appear laboratory cultures during seasons year varying percentages differences fecundity. polymorphism these denotes a self-regulating system for keeping population under control. Cosmopolitan Callosobruchus maculatus (F.) well known its pronounced dimorphism but dl.fferentbehaviour abnormal female regions world, makes phenomenon complex. l.n chinensis (L.), analis Zabrotes subfasciatus (Bohs }; though less pronounced, closely related £. as far l.tsperiodicity reduction fecundity form concerned. capability Acanthoscelides obtectus (Say) breeding both store case behavioural not externally manifested can be resolved through electrophoresis might discernible fine structure chemoreceptors.