Abstract: The demonstrative expereriment on comprehensive prevent and Control of pland disease and insect was conducted in a relatively large agricultural area (106.1ha) in Shanyi village during 1984 - 1986. The experimental results were extensively applied in production from 1987 to 1989. A techniques regulation in prevention of pesticide pollution has been formulated in the village. The integrated measures for prevent pesticide pollution include: working out the control strategyi applying pesticide in optimum period with rational dosei protecting and utilizing the natural enemies of insect i popularizing resistant plant varietiest spreading highly effective and less-persistent pesticides i applying N P and K fertilizers rationally t and so on. As a result, the remarkable economical , ecological and social benefits were achieved. The pesticide application dosage was reduced by 80. 6%. The residue, of organochlorine pesticides (such as BHC) in grain is in the range of permissible level (it was over the permissive level by 31. 6% in the past). The number of spiders in fields increased by 83. 3-180. 1% and that of Agamermis sp. (a kind of natural enemy of rice planthopper) raised to 3 times as high as that of the past. 

Key words: agricultural land, plant disease and insect integragted control, pesticide pollution