Septoria leaf spot

Septoria leaf spot
Septoria leaf spot

CLASSIFICATION

Fungi, Ascomycetes, Pezizomycotina, Dothideomycetes, Dothideomycetidae, Mycosphaerellales, Mycosphaerellaceae, Septoria

ABOUT

Septoria leaf spot is a severe fungal disease caused by Septoria lycopersici which often affects tomatoes and potatoes. The spots are circular with dark brown margins, gray centers, and small black fruiting structures.

How to treat?

  • microscopeBiological

    • If possible remove and destroy the infected and dead parts of the plant. Burn it, toss it into the garbage, or bury it deeply. Do not compost.

    • Remove weeds as well as all dead plant tissue. They may be a source of infection.

    • Apply ecological products for plant protection (e.g. copper-based spray).

  • pillChemical

    • If necessary, apply fungicide containing maneb (GHS07: Harmful, GHS08: Health hazard, GHS09: Environmental hazard).

    • If necessary, apply fungicide containing chlorothalonil (GHS05: Corrosive, GHS06: Toxic, GHS07: Harmful, GHS08: Health hazard, GHS09: Environmental hazard).

  • syringeDisease prevention

    • Use resistant species and cultivars as well as healthy, certified seeds and seedlings.

    • Avoid prolonged wetting of the leaves, which can be caused e.g. by overhead irrigation.

    • Improve the air circulation around the plant (e.g. by pruning excess foliage or increasing the spacing between plants).

    • Rotate crops. Avoid planting sensitive crops in infested soil.

    • Disinfect tools, infected flower pots, and hands to avoid disease transmission.

Check your plant's health in one tap