Psyllobora

Systematic position: The genus Psyllobora belongs to the order Coleoptera and the family Coccinellidae (lady beetles). Unlike most predatory species within this family, members of this genus are specialized mycophagous beetles, meaning their diet consists primarily of fungal material.

Biology and life cycle: The life cycle involves four stages: egg, larva, pupa, and adult. Eggs are typically laid on the underside of leaves that show signs of powdery mildew. Both larvae and adults are highly mobile and use specialized mouthparts to graze on fungal mycelium and spores found on the leaf surface.

Damage character and economic impact: Psyllobora is not a plant pest. In agricultural settings, it is considered a beneficial insect. By consuming powdery mildew, these beetles help reduce the spread of fungal infections on plants. Their presence often indicates an infestation of mildew, which the beetle is actively helping to suppress naturally.

Host plants: These beetles are found on a wide variety of host plants susceptible to powdery mildew, including grapevines, orchard trees, roses, and various vegetable crops. They are particularly active during warm, humid periods when fungal growth is most prevalent on the foliage of agricultural and ornamental plants.

Protection measures: Because they act as biological control agents, no direct measures should be taken to eliminate Psyllobora. To maintain their population, it is important to minimize the use of broad-spectrum insecticides that could harm beneficial beetles. Focus management efforts on controlling the underlying fungal pathogens through proper spacing, pruning, and, if necessary, the application of compatible fungicides.