POTENTIAL OF 4 VEGETABLE-OILS AND 10 BOTANICAL POWDERS FOR REDUCING INFESTATION OF COWPEAS BY CALLOSOBRUCHUS-MACULATUS, CALLOSOBRUCHUS-CHINENSIS AND CALLOSOBRUCHUS-RHODESIANUS

The possible use of ten botanicals and four vegetable oils in managing the bruchid beetles of legumes, Callosobruchus chinesis, C. maculatus and C. rhodesianus, was investigated. All four oils tested (corn, gro undnut, sunflower and sesame) significantly reduced the oviposition of all three bruchid species at 10 ml/kg and also significantly reduced the longevity of adults of C. maculatus and C. chinensis at this dose. Only corn and sunflower oil caused a significant reduction of longevi ty of C. rhodesianus at 10 ml/kg. The number of eggs Laid by all three bruchid species was significantly reduced in treatments to which powd ers of Cymbopogon citratus, Cinnamomum camphora, Derris inudata, Monod ora myristica, Zingiber spectabile or A. zerumbet had been added. (C) 1997 Elsevier Science Ltd.