Development of pheromone lure for monitoring field populations ofEoreuma loftini (Lepidoptera: Pyralidae).

Formulations of Mexican rice borer (MRB) pheromone components were more effective in capturing males in fields of sugarcane when dispensed from rubber septa than when evaporated from four other substrates. Concentrations of 0.63-10.0 mg of total pheromone per lure were effective over a 112-day period when formulated in rubber septa in a ratio of 8∶1∶1.3 of (Z)-13-octadecenyl acetate, (Z)-11-hexadecenyl acetate, and (Z)-13-octadecenal, respectively. Component ratios of 4∶1∶1.3 and 8∶1∶1.3 were equally effective in capturing male MRB, but efficacy decreased with higher relative concentrations of (Z)-13-octadecenyl acetate.