Ecological approaches to insect control: Entomological problems in New Zealand forests
The main entomological problems of the indigenous, the exotic and coniferous forests of New Zealand are discussed, Insects which could cause serious mortality or growth losses should be prevented from entering this country. The control of forest insects already established in New Zealand depends mainly on natural and introduced biological agents and upon silvicultural practices. The use of insecticides is advocated in forest nurseriesand when biological controls fail.