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RESULTS

(18)

DISEASE: Bacterial wilt

HOST: Strawberry

Advanced stage of wilt (center plant).

DISEASE: Bacterial wilt

HOST: Tobacco

Severe wilt of tobacco.

DISEASE: Green petal disease

HOST: Strawberry

Diseased plant with button berries and green petals that turn red. The disease is caused by a subgroup of aster yellows.

DISEASE: Hollow stalk

HOST: Tobacco

Hollow stalk may appear at time of topping and suckering. Top leaves wilt and the stalk becomes bare as the disease moves downward.

DISEASE: Hollow stalk

HOST: Tobacco

Infection of flue-cured tobacco stalks occur at wound sites caused by topping. After top infection, browning of pith occurs and tissues rot.

DISEASE: Multiplier disease

HOST: Strawberry

Multiplier disease causes production of numerous crowns along runners.

DISEASE: Strawberry lethal decline

HOST: Strawberry

Diseased plant with bronzing of older leaves and upward rolling or cupping of younger leaves. Leaves are chlorotic on upper surfaces and reddish or purplish on lower surfaces. In time, the entire plant dies.

DISEASE: Strawberry yellows

HOST: Strawberry

Symptoms of disease are stunting and marginal chlorosis of younger leaves and purple or bronze pigmentation of older leaves. Infected plants usually die.

DISEASE: Wildfire (Angular leaf spot)

HOST: Tobacco

Characteristic symptoms are necrotic, brown spots with angular margins surrounded by distinct yellow halos. The halos are caused by the production of tabtoxin.