herbicides (general) (  ) on burley tobacco (Nicotiana tabacum (burley type)) - 1440080

herbicides (general)

Host: burley tobacco (Nicotiana tabacum (burley type) L.)
Descriptor: Damage
Description: Tobacco is extremely sensitive to picloram and very small amounts from drift, contaminated equipment, or residue in the soil will cause serious injury. The most common symptom is a downward curling of the margins and tips of the leaf. The curl of the tip results in "parrott beak" or hooded appearance. Symptoms appear first on young growing leaves, but due to the persistence of the compound, it will continue to affect the new bud leaves. New leaves may take on a heart-shaped appearance as the midrib is stunted, while the adjoining tissue continues to grow. Higher rates of picloram result in thick, strappy, elongated older leaves and elongated or aborted bud leaves. Young leaves may also have a wide thick midrib with little or no adjoining leaf tissue. Picloram residues may persist in the soil and cause damage to tobacco for periods of three or more years after application.
Image type: Field
Image location: United States

Specimen Information

Specimen in collection: No
Specimen Condition:
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Photographer Information

Name: R.J. Reynolds Tobacco Company Slide Set
Organization: R.J. Reynolds Tobacco Company
Country: United States

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Image Number: 1440080

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Image Citation:(?) R.J. Reynolds Tobacco Company Slide Set, R.J. Reynolds Tobacco Company, Bugwood.org

Node Affiliation: Bugwood - UGA

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Image uploaded on Monday, January 01, 1990
Image Information last updated on Wednesday, September 01, 2010