The leopard moth, Zeuzera pyrina (L.) (Lepidoptera, Cossidae), is an important xylophagous pest on different trees such as walnut, Juglans regia (L.), which weaken the host trees by canalling in the trunks. Regarding type of damage and host range of the pest, it is so difficult to control. Catching of the male moths by traps containing sex pheromone lures is a promising method to control the pest. There are many factors influencing potential of pheromone traps. Some of these factors, such as

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... p shape, trap color and height of trap placement, can be manipulated by the user or grower. One of the components of the pheromone blend of leopard moth is (E, Z)-2, 13-octadecadien-1-ol acetate, which seems to be the pheromone compound of the current clearwing moth Synanthedon tipuliformis (Clerck) (Sesiidae). Materials and Methods: Separate experiments were conducted in walnut orchards (each having more than 10 years of damage history and area of 0.5-3.5 ha) of Najaf-Abad County (Isfahan, Iran). Pheromone traps were placed on the trees in late April. The traps were inspected at 5-day intervals until late July. The number of catched lthe moth males was recorded and also, during the growth season average of the capturing per trap per night was calculated. Lures were replaced monthly. In the present study the effects of four factors (pheromone type, trap shape, trap color and height of trap placement) on the number of catched leopard moth males were evaluated. The experiments for different factors were conducted as follows: 1. Pheromone type and lures of pheromones of S. tipuliformis and Z. pyrina, both of which were provided from Agriscense Company, were compared. 2. Trap shape, four shapes (cylindrical or standard, delta, wing and funnel) were compared. The experiment was conducted using white-colored traps placed at the height of 1.5m above the ground and had S. tipuliformis lures. 3. Trap color, three separate experiments were conducted as follows: delta traps with 3 colors (white, yellow and green), del [...]