The main dis advantages of plant introduction are:
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By plant introduction certain weeds are also introduced like that of the Eichornia crassipes. Such weeds are not present earlier.
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Certain insect pests that are causing the Potato tuber are also introduced along with the plant.
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Certain plants that are ornamental are now noxious weed. The example is water hyacinth.
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The diseases like the Smut of Wheat, Late blight of Potato, Bunchy top of Banana etc. are spread as a result of the plant introduction.
