Image Number: 1440083

Exposure of tobacco to contact herbicides such as paraquat and dinoseb causes white lesions on leaves and stems. The lesions turn brown and may fall out, leaving holes in the leaf. Low levels of exposure produce distinct individual lesions. At higher exposure levels, the lesions combine, causing the leaves to yellow and areas between the veins to die and fall out. If the plant does not die from the exposure, later growth will be normal. Weather fleck, contact injury by other herbicides, and some types of chemicals produce similar symptoms.
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Image location:
United States


Kingdom: Agrochemicals
Phylum: Herbicides
Class: Conventional Herbicides
Order: General herbicides
Family: General Herbicides
Subject: herbicides (general)


Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Asteridae
Order: Solanales
Family: Solanaceae
Genus: Nicotiana
Subject: Nicotiana tabacum (burley type) L.
Node Affiliation:
Image uploaded:
Monday, January 1, 1990
Image last updated:
Wednesday, February 16, 2011