The idea is that they kill pests, usually farm pests such as locusts, weevils, wasps, flies, aphids and so on. The problem is that they also injure or kill wild animals, farm animals, farmers and other people. Check out herbicide, insecticide, biocide, and vermicide.
It is supposed that biopesticides are not so dangerous for the environment as artificial pesticides.
THE pesticides which donot pollute environment and decompose in to environmental friendly siple molecles.
Herbicides and pesticides affects the environment by helping the food yield from being affected by bugs. On the other hand, they adversely affect the environment and our health.
Yes, modern day pesticides are designed not to become part of the environment in the first place.
Pesticides.
W. G. S. Haddow has written: 'Pesticides and the environment' -- subject(s): Bibliography, Environmental aspects of Pesticides, Pesticides
Non-persistent pesticides are compounds that break down quickly in the environment. Several different classes of pesticides make up this group: • Cholinesterase-inhibiting pesticides, which includes the organophosphates and carbamates • Chlorinated phenols • Herbicides • Pyrethroids • Fungicides • Repellents Non-persistent pesticides became widely used after persistent organochlorine pesticides were banned from manufacture and use in the United States in the 1970s. Non-persistent pesticides are less harmful to the environment because they do not build up but they have to be applied more often to households and crops to be effective.
They will help the environment by allowing farmers to use fewer pesticides.
Persistent pesticides are chemicals that remain in the environment and can accumulate over time in soil, water, and organisms. These pesticides do not easily degrade, which can lead to long-lasting environmental and health impacts. Examples include organochlorine pesticides like DDT and chlordane.
So children do not get unnecessary pesticides, and because schools are public institutions and purchase a lot of food, so farm workers do not get unnecessary pesticides, and the environment is not poisoned with unnecessary pesticides.
Chemical pesticides harm the ecosystem, the environment, and could be harmful to humans; however, without them, we would not be able to produce enough food for the current population. The best alternative is to put more energy into finding natural pesticides (such as garlic oil) which don't harm the environment, but keep insects from ruining the crops, and to make those natural pesticides available before banning chemical pesticides.
The third generation of pesticides are made of chemicals that break down in the environment quickly, as compared to the second and first generation which were DDT and arsenate of lead respectively.