Determination the population density of the different development stags of the Indian moth Plodia interpunctella Hbn in Date fruit Sayer cultivar based on spectrophotometer method

ABSTRACT: This project was conducted to editing sampling program of Plodia interpunctella based of Spectrophotometer in Sayer date palm cultivar. Results showed that the wave length of maximum absorption for the developmental stages of the egg, larva, pupa and adult of P. interpunctella in Sayer Cultivar were 1236, 1216, 1223 and 1214 respectively. Based on these results spectrophotometer had ability to detect the different growth stages of the Indian moth on studied cultivar. The suitability indicates explain the higher rate of detection of at least 0.5, which of the wavelength of maximum absorption for the diagnosis. The number sampling for proper evaluation of the developmental stages of P. interpunctella were equal to 2. Distribution of different development stages of pests on Sayer cultivar were uniform and occasional sampling could be done without consideration of environmental context. The RV and RNP indices were used in this study for evaluating the level of accuracy and sampling Randleman. RV value for at four stages of growth were equivalent to2.32, 3.27 3.15 and 3.52 respectively. The accuracy level of samplings was lower than 10 in all cases so this method could be explicated for administrative and research sampling program. The sampling cost is necessary besides the low level sampling accuracy. This subject was evaluated using RNP criteria. The amounts of these values for at four stages of growth were equivalent to 28.15, 15.44, and 19.05 and 22.37 respectively.