Powdery Mildew of Lathyrus

Disease Information

Powdery Mildew

Symptomsand damage

This appears as irregular powdery white spots on the upper surface of the lower leaves. Can be destructive in dank weather and on older plants.


Best controlled by fungicides containing Pyrifenox. Cutting off old lower leaves of sweet peas may help by improving air circulation, and reducing the source of further infection.

Examples of  Fungicides (Myclobutanil - Neem Oil – Propiconazole - Thiophanate-methyl )

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