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Tobacco Diagnostic Key

Integrated Pest Management

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complete chlorosis
yellow discoloration of the entire leaf
interveinal chlorosis
yellow discoloration between the veins
marginal chlorosis
yellow discoloration along the leaf edge
marginal necrosis
dead tissue which is often brown to black in coloration along the leaf edge
interveinal necrosis
dead tissue between the veins
complete necrosis
dead tissue affecting of the entire leaf
window paning
holes in leaf due to tissue falling out
distorted tissue that takes on the appearance of a saw blade edge