Abstract
Pheromone traps in flowering sunflower plots at Bushland, Tex., caught significantly more sunflower moths, Homoeosoma electellum (Hulst), between 6 and 12 July than before or after these dates in 1979 through 1981. Pheromone traps in a grassland pasture caught more moths before and fewer moths after sunflower began flowering than traps placed in sunflower plots. The number of moths caught in pasture traps increased and decreased at 3- to 5-week intervals, but the number of moths caught in traps in continuously flowering sunflower plots had no distinct, recurrent cyclic pattern within a season.
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