| Summary: | The lesser grain borer, <i>Rhyzopertha dominica</i> (F.), is a highly diverse feeder and widely distributed throughout the United States in agricultural and non-agricultural landscapes. Six four-funnel Lindgren traps were deployed in feed mill, grain elevator, and native prairie landscapes, to determine the most attractive food and pheromone combination (attractant) and patterns in seasonal captures. Traps were baited with combinations of wheat (crimped, high moisture, pre-fed) with or without an <i>R. dominica</i> specific aggregation pheromone in 2017 and 2018. Traps were deployed for 48 h, collected, and the number of <i>R. dominica</i> counted. <i>Rhyzopertha dominica</i> was captured among all landscapes with all attractants. There was a significant correlation between temperature and <i>R. dominica</i> captures, with peak captures occurring during the warmest months. Significantly more <i>R. dominica</i> adults were captured in traps containing the pheromone. In 2017, pheromone traps captured 818% more <i>R. dominica</i> and 543% more than in 2018. The pheromone component in the trap was more attractive than any natural stored wheat condition and should be included in future studies. Understanding the seasonal patterns and changes in capture rates in agricultural and non-agricultural landscapes may be useful in determining times of increased immigration pressure into the newly harvested grain.
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