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Plant and Crop Sciences Weed Science -- Weeds. --- Weeds --- Control.
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Aquatic weeds --- Herbicides --- Control. --- Testing.
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Aquatic weeds --- Herbicides --- Control. --- Testing.
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PPR Plant Protection --- duplicates available --- weeds --- chemical control
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Pests --- Pesticides --- Herbicides --- Pesticides. --- Herbicides. --- Control --- Control. --- Chemical control of pests --- Control of pests --- Eradication of pests --- Extermination of pests --- Pest control --- Pest eradication --- Pest extermination --- Pest management --- Economic poisons --- Herbicide --- Weed killers --- Weedicides --- Chemical control --- Eradication --- Extermination --- Management --- Agrochemicals --- Agricultural chemicals --- Poisons --- Weeds --- Equipment and supplies --- 48.54 phytopathology. --- 48.63 economic zoology. --- 48.40 forestry: general. --- Pesticide
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