Profile

Fly blight is a disease of barley, wheat and oats caused by a fungus. In case of infestation, black spore deposits grow in place of the ears/panicles, which can also endanger surrounding cereal stands. Depending on the extent, considerable economic damage can result.

Biology

Flight blight is a purely seed-borne disease. In barley and wheat fly blight, infection occurs in the embryo. The source of infection is fly blight plants in the stand itself and in neighboring stands. Flight blight does not spread in the stand, but infects the grain plants of other plants. In oat fly blight, infection of seedlings occurs through spores on the seed.

Host plants

Host plants of fly blight are barley, wheat and oats. The pathogen is found in all growing regions.

Distribution

Fly blight is widespread worldwide, most prevalent in humid and semihumid climates.

Propagation and transmission

The spore camps formed in place of the ears/ panicles spread the spores they contain via wind and rain.

Economic importance

In case of severe blight infestation, high yield losses, unsuitability as seed or the use of expensive special dressings must be expected. Diseased stands represent a source of infection over long distances.

Prevention and control

• The use of tested and healthy seeds is recommended. Attention should also be paid to the choice of varieties.
• Caution: in the case of barley and wheat fly blight, only a special dressing is effective, as the pathogen is located in the embryo.

Services

Plant Health Services