Before we can get into trying to understand whether biological pest control is the answer to the pest-control related environmental concerns, it would be proper to give ourselves a little background information on this whole pest control business; for the benefit of those who may be encountering it for the very first time.
Now, pests are organisms (typically insects) that are injurious to the interests of the people who refer to them as such. Thus to farmers, the insects that invade and eat up their crops (whether in the fields or during storage), would be termed as pests. On the other hand, the 'domestic insects' that tend to mess up with things in domestic settings (like moths, that can mess up with cloths in storage), are seen as pests by housekeepers. Worth keeping in mind is that although most pests are insects, there are also quite are number that are non-insects: with the likes of rodents (that can mess up with crops in farms of things stored in domestic settings) being seen as pests too, the fact that they are not insects notwithstanding.
Every country worldwide has been fighting to control pests for ages. The term pest is usually referred to the harmful animals that are detrimental to human health or even the ecology. Pests can be even organisms, fungi, or weeds, etc.
Before we study the various means to control the pests, here are a few of pests that we have to fight with most commonly -
Caterpillar is a pest that causes damage to the crops. Termites are known to damage furniture, and structures. Ants, cockroaches' wasps and flies are also pests. Can we forget mosquitoes and bed bugs? Rats, rodents and other mammals not just cause infections but are also carriers of diseases. Birds like pigeon, seagulls, and crows are regarded as pest when their population turns a nuisance, as they cause more damage than good.
Controlling pests has always been a part of human evolution, since a balance has to be maintained. In order to improve the agricultural output, one has to keep away the pests from the fields and protect the crops. It is generally seen, where there is human activity, and food flies and other insects gather. Public places where people throw or dispose waste it a common breeding ground for the pests.