In this book, the role of pesticide in agricultural productivity has been strongly emphasized to sustain the crop yield and quality over the world. However, the crop protection is very complicated because of the numerous interactions between the cultivated crops, the many damaging or beneficial organisms and the variable factors of the environment. The use of chemicals,ptive power on the fragile balance of nature, requires general insight into their properties and effects.
Department of Plant Protection Henan Institute of Science and Technology
Preface
Plant provide either directly or indirectly the main source of nutrition for mankind, animals and uncountable masses of lower organisms. An ample supply of food, fibers and other vegetable matter is a prerequisite to health as well as to social and economic development of any human society. Thus, the increase competition from all kinds of organisms, which cause injury, disease , is unwanted. Man is waging a continuous struggle against these injurious and troublesome organisms, called pest, pathogen and weed etal. in order to protect his food, shelter and living.
