Chemical pesticides are highly toxic and are very lethal not only to pests but anyone handling them, if not used with enough care.
Currently, five major categories of pesticides exist; they are the inorganic compounds, organophosphates, chlorinated hydrocarbons, botanicals and carbonates.
Each group comprises of different pesticides with differing levels of lethality.
Some are very deadly while the potency of some is comparatively less.
Conventional chemical pesticides exterminates pests in one go and are the quickest means of getting rid of these obnoxious creatures.
They are readily available and can be used without much fuss with maximum effect.
They are reliable too.
The added advantage is that a single pesticide can eliminate several types of pests and the residue can act as repellents for a longer period of time.
Insecticides act in three different ways.
Some are highly toxic that pests die the instant the poison touches their body and are called contact poisons.
Some chemicals emit toxic fumes, which destroys an insect when the fumes are inhaled.
This kind for pesticides are best suited for enclosed areas like green houses.
The third kind comprises of poison compounds which needs to be ingested by the pest to have any effect.
Here, people mixes up the poison with eatables like pieces of fruits or sweet syrups which are lapped up by the unsuspecting pest.
However, this kind of poisons starts to work slowly when compared to the other two types.
But this is the best suited method for controlling pests in homes and places like hospitals and offices.
However, chemical exterminators have to be used with much care.
The greatest disadvantage is that along with the pests, they wipe out a host of other insects and animals also.
Large scale exposure to these chemicals is known to have induced many disorders in human body.
But the easy availability and ease to use them have made these pesticides the most sought after by the farmer and the house owner alike.