| plantsdb

RESULTS

(26)

DISEASE: Aster yellows

HOST: Aster

Foliar symptoms of chlorosis, malformation of leaves, and phyllody.

DISEASE: Aster yellows

HOST: Aster

Flowers with phyllody (left and center). Healthy flower (right).

DISEASE: Aster yellows

HOST: Aster

Macrosteles sp., a leafhopper vector of aster yellows phytoplasma.

DISEASE: Bacterial leaf spot

HOST: Peanut

The disease causes water-soaked lesions, particularly on upper leaf surfaces. Lesions enlarge and later display brown necrotic areas. Leaflets become chlorotic and shed prematurely.

DISEASE: Bacterial wilt

HOST: Peanut

First sign of disease is slight drooping or curling of leaves. As the plant declines, foliage turns yellow, followed by wilt and death of stems.

DISEASE: Bacterial wilt

HOST: Peanut

Advanced stage of disease with death of plants.

DISEASE: Bacterial wilt

HOST: Peanut

Vascular discoloration of taproot.

DISEASE: Citrus canker

HOST: Citrus (Orange)

Leaf with leaf miner tunnels and numerous cankerlike lesions.

DISEASE: Citrus canker

HOST: Citrus (Orange)

Upper side of leaves with corky, raised lesions surrounded by yellow halos, a late stage of disease. Such infections usually are visible on lower sides of leaves first and soon after on upper sides.