Origin of Pesticides

According
to Oreyomi (2001) the origin and use of pesticide in the control of pest dates
back to many centuries ago, when pest damage to crops was very high growing
higher the higher from day to day despite the physical, biological and cultural
method of pest control applied by farmers in managing pest. Thus scientist try
to find solution to the devastating problem and in course of this, they were
subjected to some experimental research work of using some plants which they
extracted from flowers of these plants chrysanthemum cinerariefdium
(pyrethrurn), Peruvian cure (Rotenone), Urginea martina plant (red squill) and
so on and were very active against the targeted pest immediately when applied
(Mira, 1996).

Today
approximately about 70,000 different chemical are manufacture all over world.
And are biologically active in pest control against damages injuries and
discomfort cause by pest crops (quantity quality) and as well reduce loss in
agricultural investment and limit scarcity of food (Erutase, 2004).
Scientist
in the world particularly in United States and Europe, develop techniques in
manufacturing the different agro-chemical in such a way that the chemical
structure of a pesticide met to control a pest can effective to the target pest
(Pimentel, 1996).
So
the different chemicals were classified into various types base on the chemical
composition of the pesticides and the set of pest. The products can be
controlled as follows:
Table
2.1: Pesticides and their target pests
Products
Target pest
Acaricide
Mites, spiders, ticks
Arboricide
Tress, shrubs
Aricide
Birds
Bactericide
Bacteria
Fungicide
Fungi
Herbicide
Weeds
Insecticide
Insects (may also control tick and mites)
Nematocide
Nematode
Ovicide
Eggs of insect, mite and so on
Larvicide
Larva of insect
Rodenticide
Rodents rats and so on
(Source: Akpoguma, 2003).
However
the three main types are insecticide, herbicide and fungicide used in
agriculture. There are either other application for agrochemical outside
agriculture such as insecticide used to control mosquitoes or to protect
building from termite attack and rodenticide in powder and solid form used in
controlling rats in residential, home to reduce rat destruction to house
properties and disease transmission (Akpoguma, 2003).
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