The word “pesticide” itself to great extend outlines the problems related to it. The root “cide” which comes from Latin “kill” directly expresses the purpose of these substances – killing, destroying living creatures, war with nature. The root “pest” now in many world languages means “vermin”, and implies that man divides all creatures into useful for him and harmful denying the latter the right to existence.
“Pesticides” is a wide notion that includes many chemical compounds that have suppressing effect on animate nature. The most widely spread and known are insecticides which kill insects, herbicides which destroy herbs, fungicides directed against fungi and rodenticides which are fatal for rodents. But there exist means against other groups of living creatures: acaricides (acaridae), ichthyocides (fish), nematocides (coelelminth).