Glume blotch of wheat

Symptoms

• Pale, yellow, light-brown or faint spots, with or without a dark border and with small black pycnidia, appear on the leaves, stems and ears. In the book this is a shared description for the pathogens Septoria graminis and S. nodorum.
• Spots appear on the glumes, so the ear becomes mottled or turns brown. The grains are shrivelled.

When to look

Leaf assessment is done at milk ripeness or 10–12 days after heading, and also before harvest, when the disease shows most fully.

How to count

• Assessment is made using the Geshele scale on the first, second, third and fourth leaves, counting from the ear.
• The percentage and severity of ear infection are determined before harvest. 20 ears are examined at each of five places in two non-adjacent replications and scored on a four-point scale.

No rate and no spray timing here: both come from the label and the register.

Every fact rests on a quote from its source, and each quote was checked against the page it is printed on.

1. EPPO Global Database · European and Mediterranean Plant Protection Organization
2. Станкевич С. В., Положенець В. М., Немерицька Л. В., Журавська І. А., «Моніторинг хвороб сільськогосподарських культур», навчальний посібник, 301 с. · Інститут біоенергетичних культур і цукрових буряків НААН, Державний біотехнологічний університет; Житомир: Рута, 2022 · p. 158
3. Прогноз фітосанітарного стану агроценозів України та рекомендації щодо захисту рослин у 2025 році · Держпродспоживслужба, НААН, НАН