Alternative protection of cowpea seeds against Callosobruchus maculatus (F.) (Coleoptera: Bruchidae) using hermetic storage alone or in combination with Boscia senegalensis (Pers.) Lam ex Poir

摘要

The effect of hermetic storage alone or in combination with Boscia senegalensis was evaluated against Callosobruchus maculatus. Analysis of gas concn within a 7-day period indicated that O2 declined from 19.2 to 2.3% and CO2 rose from 1.2 to 22.8%. Prolonged storage durations increased adult mortality, significantly increased the development time and induced 60-80% reduction in the F1 progeny. The use of hermetic storage in combination with B. senegalensis fruits, at 1.2 g/litre (flask volume) reduced the emergence of the bruchid, while 2.4-4.8 g/litre completely inhibited the production of a new generation of C. maculatus