well.......
A pest is an organism, usually an insect, which has characteristics that are regarded by humans as injurious or unwanted[citation needed]. This is often because it causes damage to agriculture through feeding on crops or parasitising livestock, such as codling moth on apples, or boll weevil on cotton. An animal can also be a pest when it causes damage to a wild ecosystem or carries germs within human habitats. Examples of these include those organisms which vector human disease, such as rats and fleas which carry the plague disease, mosquitoes which vector malaria, and ticks which carry Lyme Disease.
The term pest may be used to refer specifically to harmful animals but is also often taken to mean all harmful organisms including weeds, plant pathogenic fungi and viruses. Pesticides are chemicals and other agents (e.g. beneficial micro-organisms) that are used to control or protect other organisms from pests. The related term vermin has much overlap with pest, but generally only includes those creatures that are seen to be vectors of diseases.
It is possible for an animal to be a pest in one setting but beneficial or domesticated in another (for example, European rabbits introduced to Australia caused ecological damage beyond the scale they inflicted in their natural habitat). Many weeds (plant pests) are also seen as useful under certain conditions, for instance Patterson's curse is often valued as food for honeybees and as a wildflower, even though it can poison livestock.
A pest is an organism, usually an insect, which has characteristics that are regarded by humans as injurious or unwanted[citation needed]. This is often because it causes damage to agriculture through feeding on crops or parasitising livestock, such as codling moth on apples, or boll weevil on cotton. An animal can also be a pest when it causes damage to a wild ecosystem or carries germs within human habitats. Examples of these include those organisms which vector human disease, such as rats and fleas which carry the plague disease, mosquitoes which vector malaria, and ticks which carry Lyme Disease.
The term pest may be used to refer specifically to harmful animals but is also often taken to mean all harmful organisms including weeds, plant pathogenic fungi and viruses. Pesticides are chemicals and other agents (e.g. beneficial micro-organisms) that are used to control or protect other organisms from pests. The related term vermin has much overlap with pest, but generally only includes those creatures that are seen to be vectors of diseases.
It is possible for an animal to be a pest in one setting but beneficial or domesticated in another (for example, European rabbits introduced to Australia caused ecological damage beyond the scale they inflicted in their natural habitat). Many weeds (plant pests) are also seen as useful under certain conditions, for instance Patterson's curse is often valued as food for honeybees and as a wildflower, even though it can poison livestock.
Some common examples of pests are rodents, snails, slugs, locusts, cabbage butterfly and many more.
Insects
C. S. Creighton has written: 'Field evaluation of chemical compounds for control of cabbage caterpillars' -- subject(s): Testing, Caterpillars, Cabbage, Insecticides, Control, Pests, Diseases and pests
eat it
John Michael Bonman has written: 'Biology of Phoma lingam on cabbage' -- subject(s): Cabbage, Phoma, Diseases and pests
it eats into the sugarcane
T. Greaves has written: 'The insecticidal control of cabbage pests at Canberra, A.C.T'
Rabbits, Ground Hogs (woodchucks), Deer are the most common garden pests.
Biological control is the beneficial action of predators, parasites, pathogens, and competitors in controlling pests and their damage.
Because the pests damage the farmer's crops, causing him to lose yield and not make as much money.
There are many but worst of all is snail as far as extent of damage. They take massive chyunks out of the leaves.
Pests have been causing imense damage to crops for thousands of years