A brief description of some of the most important factors and activities is provided to help explain how an aerial spray operation is conducted. Types of Aircraft Involved Aerial application of Btk can be done using various types of fixed wing aircraft or helicopters. The selection of aircraft depends on the size of the application area, application window, budgets and terrain. The objective is to use aircraft that apply the insecticide in the safest and most efficient manner. Fixed wing aircraft are used when there are large, continuous areas that may be sprayed with the minimum number of turns.
Helicopters are useful for treating discrete or isolated patches of host material.
Fixed wing treatment is less costly than by helicopter. Aircraft used for spraying can vary considerably in size and configuration ranging from four engine DC-6Bs to single engine crop dusting aircraft. There is also a similar range for helicopters. It is up to the project management team to select the right type of machine for each situation. For example, the 1999 aerial spray project will utilize two types of fixed wing aircraft to conduct the actual spraying.