Effects of Nocturnal Wind on Performance of Two Sex Pheromone Traps for Noctuid Moths 123

Abstract
Effects of nocturnal wind velocities from 0 (calm) to 16.9 km/h on relative performance of 2 sex pheromone live insect traps were studied. Relative percentages of male tobacco budworm moths, Heliothis virescens (F.), caught in wind-vane traps and in inverted cone traps were correlated with average wind velocities between 1:00 and 4:00 AM. Of the basic traps, inverted single-cone traps caught more moths at relatively low, 0–9.6 km/h, air velocities, and wind-vane traps caught more moths at higher, 9.6–16 km/h, nocturnal wind velocities. Of modified traps, inverted double-cone traps caught more moths than wind-vane traps with winds as high as 16 km/h.