![]() ![]() It is extremely difficult to predict accurately whether an exotic organism will become established, and once established, become economically important. Some of the worst plant disease epidemics that have occurred through out the world, for example the downy mildew of grapes in Europe and the bacterial canker of citrus, the chestnut operation of the quarantine regulations. When plant pathogens are introduced into an area in which they did not previously exist, they are likely to cause much more catastrophic epidemics than do the existing pathogens. Plant quarantine may be defined as the restriction imposed by duly constituted authorities on the production, movement and existence of plants or plant materials, or animals or animal products or any other article or material or normal activity of persons and is brought under regulation in order that the introduction or spread of a pest may be prevented or 8 limited or in order that the pest already introduced may be controlled or to avoid losses that would otherwise occur through the damage done by the pest or through the continuing cost of their control. The first legal restrictions to hinder the spread of disease were enacted against human disease. TNAU Agritech Portal :: Exports & Imports ![]()
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