Description

Fungus  gnats or black fly can cause damage both directly and indirectly. Direct damage results when the larvae produce nestle within the root system where they devour the roots of the plant. When the root system is eroded in this manner, the plant has difficulty taking up the water and minerals resulting in the roots/plant dying off. Indirect damage occurs by larvae spreading mites, nematodes, viruses and various fungi. Young plants are particularly susceptible.