This handbook series serve as hormones growth regulators and sensory compounds for growth development and reproduction of insects plants and microorganisms. Others are useful for defense or attack against other species or organisms. Once these chemicals or their analogs and derivatives are applied by external means to the same (where produced) or different species they come under the label pesticides because they contaminate the environment. Therefore they are subject to regulatory requirements in the same way the other pesticides are handled before they are used commercially. However it is anticipated that the naturally occurring pesticides would easily meet the regulatory and environmental requirements for their safe and effective use in pest control programs. In a handbook series of this type with diversified subjects dealing with plant insect and microbial compounds it is very difficult to achieve either uniformity or complete coverage while putting the subject matter together. This goal was achieved to a large extent with the understanding and full cooperation of chapter contributors who deserve appreciation.
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