Host: flue-cured tobacco (Nicotiana tabacum (flue-cured type)
Description: Glyphosate is a systemic herbicide that will produce injury in 5 to 7 days after exposure to the foliage. Injury frirst appears as a light yellow discoloration in the newly developing leaves. Leaf color changes from green to pale yellow and/or white from the base of the leaf to the tip. Newly formed leaves will be narrow, and the margins will be curled downwards. Symptoms on mature leaves will consist of areas of yellow or brown tissue between the veins while the remaining area of the leaf is normal. Dead areas will fall out, resulting in a "shot-hole" appearance. Areas around the veins will often be green with a yellow discoloration between the veins. Actively growing plants will die after exposure to glyphosate.
Image type: Field
Image location: United States
Specimen in collection: No
Name: R.J. Reynolds Tobacco Company Slide Set
Organization: R.J. Reynolds Tobacco Company
Country: United States