Aedes aegypti Leucauge argyrobapta SSCDS Technology: general issues Tetragnathidae airflow speed consumer's safety coverage deposition dermal exposure drop pulverization drop size distribution environment protection fixed spray delivery greenhouse homogeneity image analysis inhalation exposure liquid flow rate nontarget effects nozzle testing apparatus operator's health orchards permethrin pesticide pesticide application pneumatic nozzle precision spraying pyrethroid rover