The effect of short exposures to spinosad-treated wheat, Triticum aestivum L., or maize, Zea mays L., was evaluated against adults of four stored-product insect species: lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae); rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae); red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae); and the psoc...

Abstract In the present study we examined effect of presence wheat bugs ( Eurygaster spp. and Aelia spp.) on mortality, progeny production infestation patterns three stored product insects, Trogoderma granarium Everts, Sitophilus oryzae (L.) Rhyzopertha dominica (F.). The bioassays were carried out under laboratory conditions (25 ± 1 °C, 60 5% relative humidity (r.h.) continuous darkness), 20 a...

Phosphine resistance occurs in many areas worldwide. The present study evaluated Sitophilus species from different geographical origins using two protocols: (i) the Food and Agriculture Organization (FAO) protocol (30 ppm for 20 h) (ii) dose–response (50–1000 3 d). According to our results, most of populations tested were susceptible phosphine. In FAO protocol, 13 field out 35 categorized as re...

Aeration using automatic controllers was compared with manually‐activated aeration (manual aeration) in bins of farm‐stored rice in Nome, Texas, from 17 September 2002 through the end of the year. Manual aeration was defined as the farm owner manually activating the fans in mid‐October, while automatic aeration employed activation temperatures of 23.9 C, 15.6 C, and 7.2 C for three discreet coo...