--Eight hour copulation of the melon fly,

No abstract

Abstract-Pheromone clouds sprayed by melon fly males were visually detected by focusing a beam of light at them during dusk when the males were vibrating their wings. The clouds were sprayed to the front, rear and upper sides of the male. We found that special morphological structures are used for spraying the pheromone clouds. When a male melon fly engages in calling behavior, sex pheromone droplets are excreted from his anus. This excretion is wiped off with the tarsus of his hind leg, and then it is deposited on the sexually dimorphic cubital cell hairs on the wing. During wing vibration, the targal bristles on the 3rd abdominal segment, which are peculiar to males, are rubbed against the specialized hairs of the cubital cell. Calling males sprayed clouds of pheromone with these actions.

No abstract

A light emitting diode (LED) color ray was used to determine the most effective light color to capture the West Indian sweet potato weevil, Euscepes postfasciatus (Fairmaire). Preference tests were conducted using four colors of LED ray (blue, green, yellow and red) at fixed light quanta in the laboratory. The weevils preferred the green LED to the three other LEDs. The effectiveness of a green LED trap was subsequently compared with that of a sweet potato root trap in a sweet potato field with mature potatoes and the green LED trap was confirmed to be applicable for monitoring of the number of weevil.