تاثیر رنگ و ارتفاع تله فرومونی بر میزان شکار حشره نر شب پره پشت الماسی Plutella xylostella (L.)(Lepidoptera: Plutellidae)

Diamondback moth, Plutella xylostella (L.)(Lepidoptera: Plutellidae) is one of the most important and destructive pests of Brassica crop which causes qualitative and quantitative destruction. High reproductive rate, high capability of immigration of this pest and its resistance to most chemical insecticides groups make it difficult to control the pests, and make many problems for farmers. One of the control methods for this pest is using sex pheromone trap. Efficiency of pheromone trap is influenced by a number of factors including: shape, location, color and etc. This study was intended to examine the effects of two factors color and height of pheromone traps. Also this research was carried out in a cauliflower field in Falavarjan, Isfahan province, in a randomized complete block design with 6 treatments and 4 replications. To this aim, the treatment consisted of green, yellow, and transparent colors with two different heights of 70 and 120 centimeter from the ground and bottle traps were used. Results indicated that, factor of color on capturing male moth is significant (p<0.001) and among the all colors, yellow trap has highest mean and transparent traps has the lowest mean of capturing the male moth, Through two different traps heights, traps placed at 70cm above of ground level (on plant canopy) capturing the highest number of the moths in comparison to traps placed at 120 cm above ground level so, factor of height on capturing male moth is significant (p<0.001) .In this experiment, influence of two factors color and height, became significant, whereas the interaction between them did not. The finding showed that which can be reduced the population of the DBM with pheromone control and decrease the over use of toxins in host plant farms, specially vegetable that use freshly.