Some aspects of the biology of Barioscapus cordiae (Mshl.) (Coleoptera: Curculionidae).
The biology and injuriousness of the weevil Barioscapus cordiae on Cordia myxa and C. obliqua [C. dichotoma] in the Punjab, India, are described. Adults attack the fruits and feed on the green pedicel, sepals and pollen grains inside the buds. Mating takes place 4-7 days after feeding, and adults can mate up to 20 times during their life. Oviposition begins 6-32 h after mating, and the eggs are deposited in cavities prepared in the calyx. The number of eggs laid per female averages 47.6. The eggs hatch in about 7 days, and the larvae develop in the seeds, moulting 3 times before pupating in the fruit. Adult emergence begins towards the end of May, and the adults leave the fruits and hibernate under the bark of various trees. Active adults live for an average of 16.4 days. The torymid Microdontomerus sp. causes 27% parasitism to larvae in the fruit.