SUSCEPTIBILITY OF SOME VARIETIES OF PHASEOLUS SPP. TO ZABROTES-SUBFASCIATUS (BOHEMAN)

Fifteen varieties of bean, Phaseolus spp., were studied for relative s usceptibility to the following effects of Mexican bean weevil Zabrotes subfasciatus (Boheman): numbers of eggs laid, percentage of emergence (new progeny), damaged kernels, grain weight loss, and effect on germ ination. The sex ratio of progeny was also determined. The Tepari and Yorimuni varieties with the lowest numbers of laid eggs, new progeny, weight loss, and highest germination rates were the most resistant. Va rieties Bolita Queretaro and Rio Grande were the most susceptible. Z. subfasciatus prefers small light-colored kernels such as Tepari and Yo rimuni varieties.