Question

What pathogen cause lactuca sativa appear dark spot on leaf?

Answer 1

Fungal diseases also can cause brown spots on plant leaves. Removing the infected leaves, avoiding wetting foliage when watering plants' soil and increasing air circulation around plants typically takes care of fungal diseases on houseplants

Answer 2

Answer:

Sometimes browning or dying leaves indicate that plants have insect pests, such as spider mites or scale. These tiny insects generally hide on the underside of leaves and along stems. ... Fungal diseases also can cause brown spots on plant leaves.