PLANT POWDERS AS STORED GRAIN PROTECTANTS AGAINST ZABROTES-SUBFASCIATUS (BOHEMAN) (COLEOPTERA, BRUCHIDAE)

Two laboratory trials were conducted to evaluate the efficacy of powde rs of ten plant species common in Sonora, Mexico, against the bean wee vil, Zabrotes subfasciatus (Boheman), in stored pinto beans (Phaseolus vulgaris). The parameters measured were insect repellency, numbers of eggs oviposited. and numbers of F1 progeny. Results showed that none of the plants caused insect mortality, reduced numbers of eggs oviposi ted, nor affected numbers of F1 emerging adults. Two species, Argemone mexicana and Larrea tridentata, were significantly less attractive to Z. subfasciatus when added to pinto beans.