| plantsdb

RESULTS

(11)

DISEASE: Angular leaf spot

HOST: Tobacco

Leaf with light brown, angular spots. The difference between this disease and wildfire of tobacco is that wildfire is caused by a strain that produces tabtoxin. It causes conspicuous halos around lesions and large parts of a leaf may turn yellow .

DISEASE: Angular leaf spot

HOST: Tobacco

Yellowing of adjacent tissues occur as spots age (midseason). It causes conspicuous halos around lesions. Large parts of a leaf may turn yellow.

DISEASE: Angular leaf spot

HOST: Tobacco

Severely diseased leaf with extensive yellowing.

DISEASE: Halo blight

HOST: Rice

Leaves with yellowish brown lesions, 2 to 10 mm in diameter. Lesions are surrounded by distinct halos. Later, brown spots or stripes may develop in the center.

DISEASE: Ratoon stunt

HOST: Sugarcane

Necrotic, reddish vascular bundles in node of sliced stalk, a diagnostic symptom.

DISEASE: Ratoon stunt

HOST: Sugarcane

Disease of susceptible cultivar L62-96 (right). External symptoms are characterized by stunting and poor growth.

DISEASE: Ratoon stunt

HOST: Sugarcane

Red discoloration just below nodal tissues is a symptom in mature stalks of 'L41-233'.

DISEASE: Ratoon stunt

HOST: Sugarcane

Row of disease 'Trojan' plants (left). Healthy row (right).

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.