''Pyrenophora graminea'' is the causal agent of barley stripe. Barley stripe is disease of
barley that once caused significant
crop yield
In agriculture, the yield is a measurement of the amount of a crop grown, or product such as wool, meat or milk produced, per unit area of land. The seed ratio is another way of calculating yields.
Innovations, such as the use of fertilizer, the c ...
losses in many areas of the world.
[
] Its associated anamorph is Drechslera graminea (Rabenhorst ex Schlechtendal) S. Ito 1930.
Identification
Asexual stage:
Pycnidia are rarely observed in nature. They are 70-176 μm in diameter, globose to pear-shaped, and develop superficially or partly submerged. The wall is thin and fragile and is yellow to brown, with a short
ostiole
An ''ostiole'' is a small hole or opening through which algae or fungi release their mature spores.
The word is a diminutive of "ostium", "opening".
The term is also used in higher plants, for example to denote the opening of the involuted ...
.