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<br />11. Supplemental Chemical Control Measures <br /> <br />In situations wheTe adequate vector control is not obtained <br />through prevention and source reduction measures, provision should <br />be made for supplemental use of insecticides and rodenticides t,o <br />achieve the desired level of control. <br /> <br />III. Vector Appraisal <br /> <br />Arrangements should be made for carrying out a routine program <br />of vector appraisal as a part of normal operations of the reservoir <br />and associated recreational areas. Inspections for adult and larval <br />mosquitoes and other vectors are essential for planning and evaluating <br />control measures and for adjusting control programs to meet temporary <br />or emergency situations. <br /> <br />E-3 <br />