Abstract: Human beings have to be facing many problems including the environmental pollution and insect pest disasters. How to treat them? The author suggests a way that human learn to coexist with various abiotic things and millions of species of organisms including numerous insects. Many insects are useful to human being in pest control as natural enemies, in plant pollination as media, in daily life as delicious foods, in medicine as drugs, and in industry as materials. Therefore, rational utilization of insect resources is very important. Agro-forestry pests should be controlled by natural factors, such as plant resistance, natural enemies, growth regulators, pheromones, sterilizing techniques, plant insecticides, or combination of them. The use of chemical insecticides should be selected for considering their effects on natural control factors and environmental pollution.

Key words: insect pests, natural control strategies, sustainable development