Study on the Aerial Equipment of Spraying Pesticide and Techniques of MonitoringⅡ.Controlling Dendrolimus punctatus by the Aerial Equipment of Spraying Pesticide

When being equipped with the petrel 650B motor glider,the HU2-HW1 spraying equipment of ultra low volume (ULV) and the NT100 Global Positioning System (GPS) were first applied in the forest region in Wuming County,Guangxi,for control of forest pest and disease there.When 2.5% EC deltamethrin was diluted with 0# Diesel oil and sprayed at 30 and 40 mL·hm-2 during an aerial spraying,the average mortality rates of pine caterpillar were 96.4% and 98.3% respectively.When 2.5% EC deltamethrin was diluted with water and sprayed at 60 mL·hm -2 in a similar spraying,the average mortality rates of pine caterpillar and Dasychira axutha were 97.6% and 93.6% respectively.100 billion spores·g-1 Beauveria bassiana was sprayed at 120 g·hm -2 being mixed at the formula of 5 spores:100 water:0.5 Tuwen 80∶0.5 salt,plus 3 liter water for further dilution,the death rates of pine caterpillar and D.axutha were 67.7% and 50.3% respectively.