BEST TIMING OF CONTROLLING APPLICATION FOR PECTINOPHORA GOSSYPIELLA (SAUND.) USING REMOTE SENSING

摘要

Since they are prerequisite to predicting timing of insect life cycle events and to initiating management actions which help the forecasting system in establishment of an IPM program for the control of P. gossypiella, Satellite remote sensing was used in determining the emergence and population density of P. gossypiella; and using the heat unit summation method to expect their population peaks and number of generations that the insect can be expected to have during a specific period of time that can assist in reduce monitoring time and find best timing of applying control measures in cotton fields. This work acts by calculating the average of thermal units in degree-days (dd's) for completion of generation (499.71 degrees-days) considering 12.03 °C as a developmental threshold. We also found that this insect pest completes four main overlapping generations; in addition to the 5th generation. These data indicate that, the best timing for control application against P. gossypiella can easily be calculated and expected.