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RESULTS

(16)

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: Drippy gill

HOST: Mushroom

Drippy gill is characterized by small dark spots on gills with drops of bacterial ooze at the centers. Severe infection results in slimy areas and collapse of gills.

DISEASE: Drippy gill

HOST: Mushroom

Close-up of infected gills with bacterial ooze.

DISEASE: Drippy gill

HOST: Mushroom

Another view of small, dark spots on gills.

DISEASE: Witches'-broom

HOST: Alfalfa

Alfalfa plant (center) exhibiting stunting and proliferation of stems. Other symptoms are small, rounded, chlorotic, often puckered leaves and a yellowish cast.

DISEASE: Witches'-broom

HOST: Alfalfa

Young plant (left) with small, numerous stems (witches'-broom). Healthy stems (right).

DISEASE: Witches'-broom

HOST: Cactus

Witches'-broom of Opuntia cactus.

DISEASE: Witches'-broom

HOST: Citrus (Lime)

Lime tree with compact, small leaves (witches'-broom). Leaves on older brooms dry out and eventually drop, leaving dead, bare branches. There are no flowers or fruit on brooms.