Scald of barley

Symptoms

Small oval greyish-white spots with a brown border appear on both sides of the leaf.

Signs of the pathogen

Sporulation forms on the underside of the leaf as barely visible whitish cushions.

How to count

• Assessment is made on the Peresypkin and Drapaty scale separately for each leaf tier, and the overall degree of infection is calculated as the arithmetic mean. On the plot, 10 plants are examined at 30 places in each of two non-adjacent replications.
• On production plots of up to 10 ha, it is recommended to examine 500 plants along the field diagonal and to add 100 plants for each further 10 ha. Leaf infection is rated on a six-point scale.
• The number of leaves given each score is counted, and the degree of infection in percent is determined using the generally accepted formula.

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. 159, 160
3. Прогноз фітосанітарного стану агроценозів України та рекомендації щодо захисту рослин у 2025 році · Держпродспоживслужба, НААН, НАН