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RESULTS

(19)

DISEASE: Bacterial leaf blight

HOST: Carrot

Leaf lesions begin as water-soaked spots that progress to small, yellow, angular spots and later expand to necrotic lesions with yellow halos.

DISEASE: Bacterial leaf blight

HOST: Carrot

Bacterial ooze on flower stalk from systemic invasion of the pathogen.

DISEASE: Bacterial soft rot

HOST: Carrot

Carrots with advanced stage of soft rot. Lesions on taproots are sunken and dull orange. The epidermis may stay intact in early stages of disease.

DISEASE: Bacterial wilt

HOST: Strawberry

Advanced stage of wilt (center plant).

DISEASE: Carrot yellows

HOST: Carrot

Flowers with shoot proliferation (witches’-broom) (left). Healthy flower (right). Virescence and phyllody of flower parts are common.

DISEASE: Carrot yellows

HOST: Carrot

Carrot with proliferation of roots. Initial symptoms include yellowing and narrowing of veins of young leaves. The entire leaf later becomes necrotic.

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: 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.