Abstract
Larvae of Callosobruchus maculatus have poor performance in seeds of the cowpea (Vigna Unguiculata) cultivar TVu 2027, and of its progenies IT81D-1045 and IT81D-1064, when compared to cultivars CE-31, CE-11, and CE-524. We did not find any correlation between proteinase (trypsin, chymotrypsin, Subtilisin BPN', papain) inhibitory activity and the resistance shown by cultivars TVu 2027, IT81D-1045, and IT81D-1064. Similarly, there was no obvious relationship between the levels of lectin (hemagglutination activity) or tannins and the resistance or susceptibility of the seeds to predation by C. maculatus. The C. maculatus resistant cowpea seeds (IT81D-1045, IT81D-1064) support the development of Zabrotes subfasciatus, a bruchid that infests seeds of both Phaseolus vulgaris and Vigna unguiculata.
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