Pesticides are various chemicals used to defray pests, unwanted plant diseases or fungi. Some pesticides require direct contact for pests to be destroyed or repelled away, and some require ingestion of the pesticide for the pesticide to work effectively. Some believe that in order to defeat all pests and not just a few; the pesticide may need to be set as bait as opposed to being used as a spray. Introducing pesticides as bait is also believed to be less pricey and much more efficient. Insecticides are one of the various forms of pesticides, and it is frequently confused with the term pesticide. Insecticides also require either direct contact with pests or either ingestion of the insecticide to successfully kill the pest. Insecticides are referred to as "systemic" chemicals and can also be either absorbed, fed or injected into plants or animals for defense against various pests. When the insect or pests attempt to feed off of the insecticide-injected plant or animal, the pests ingest the chemical and are destroyed.
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