BOX 1-1

Biopesticide Categories

Product

Definition

Examples

Microbial pesticides

Microorganisms that operate as the active ingredient

Bacteria, fungi, viruses, virus coat proteins

Plant-pesticides

Substances that plants produce from genetic material that has been added to them

Bacillus thuringiensis pesticidal protein, potato leafroll virus (PLRV) resistance gene produced in potato plants

Biochemical pesticides

Naturally occurring substances that control pests by nontoxic mechanisms

Pheromones, floral attractants and plant volatiles, natural insect-growth regulators, plant-growth regulators and herbicides, repellents

Source: EPA 1999

cally exclude agents that are normally considered to be biological control agents and plant varieties that are produced by traditional breeding programs. We will extend the term to agents used in veterinary medicine to control insect and nematode pests.

Pesticides used in companion animals and livestock include pesticides that fit the FIFRA definition and that have been used widely in the treatment of insect infestations of animals. With the advent of the avermectin class of endectocides in the late 1970s—ivermectin, doramectin, milbemycin, and moxidectin—compounds that are active against both external insects and internal parasites became available (figure 1-1). Thus, some pesticides used on animals undergo approval through the FDA New Animal Drug Application (NADA) policy and do not undergo review and approval through FIFRA policy.

HISTORY OF PEST CONTROL

From their earliest days agriculturists have been beset by pests. Carvings dating back to 2300 BC in tombs in Egypt, one of the centers of plant domestication, depict locusts eating grain. Biblical passages allude to locusts (Exodus 10:3-6, 12-17, 19) and agricultural pests of other kinds (Joel 1:4, 7, 10-12, 17, 18, 2:19, 25; Deuteronomy 28:38, 39, 42; Amos 4:9,



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