Cephalosporium stripe

Cephalosporium stripe is a significant fungal disease affecting small grain cereals, primarily caused by the pathogen Cephalosporium gramineum (often taxonomically reclassified). It is classified as a vascular disease because the fungus colonizes the xylem, preventing water and nutrient transport throughout the plant tissue.

The primary hosts of this pathogen include winter wheat, barley, and rye. While it is most economically devastating in wheat production, the disease can also persist in other monocot species, allowing the pathogen to survive in agricultural fields even when susceptible host crops are rotated.

The disease is characterized by distinct yellow, longitudinal stripes that run along the leaf blades and sheaths. As the infection progresses, the leaves wither and the entire plant may show signs of stunting. In severe cases, the heads become sterile or produce shriveled, light-weight grains, resulting in substantial yield losses.

Environmental conditions that favor the development of Cephalosporium stripe include cool, moist soil conditions during the spring. The fungus enters the plant through wounds in the roots or crowns, often caused by freeze-thaw cycles or soil-inhabiting pests, and spreads rapidly through the vascular system during periods of high humidity.

Management strategies focus on long-term prevention rather than chemical control, as curative fungicides are largely ineffective once the vascular system is colonized. Integrated management involves

• extending crop rotation intervals to starve the fungus in the absence of a host;
• managing soil moisture through improved drainage;
• minimizing plant wounding;
• using resistant or tolerant wheat cultivars developed by breeding programs.