Aster yellows

Yellowing and shoot proliferation of foliage.

Healthy head (left) and diseased head (right). Diseased seedlings may die within 2 to 3 weeks. Infec

Diseased watercress (left) and healthy plant (right).

'Marmolada' strawberry with fruit distortion and phyllody of achenes.

Aster yellows causes flowers to be entirely phylloid. Young leaves of infected plants are small, chl

Diagnostic characteristics for the disease are yellowing of young leaves, proliferation of secondary

Malformation of diseased flower.

Diseased plant with malformed tubers.

Stunted, chlorotic plants (left) with stiff, rolled leaves.

Chlorotic and stunted foliage with necrotic leaf margins. Other symptoms may be phyllody, virescence