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Monitoring is conducted in the form of the OPT population samples. This information is necessary to determine the status of the population of the OPT as knowing the stage of biology and a density of OPT. information about biological stages are used to find out the whereabouts of the first OPT out in the field and when applied to the control. Information number and size of the population in need in building the decision-making process in the economic threshold. 2. The importance of mendefenisikan damage and population density OPT that can be tolerated gave birth to the concept of the economic Threshold (AE), which the economic Threshold is very need to plan for the management of the OPT is based upon the objectivity of the management danmonitoring the status of cultivated land in the OPT
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