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Herbicide Resistance

Cases of herbicide-resistant weeds worldwide are continually compiled online in the International Survey of Herbicide Resistant Weeds (see website link on this page).

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Invasive Plants

USDA, APHIS, PPQ’s Center for Plant Health Science and Technology began staffing scientists in 1997 for what was to become the newly created Plant Epidemiology and Risk Analysis Laboratory (PERAL).

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