IPM Information

Pathology Information:

Species Name: Alternaria tenuissima (Nees) Wiltshire


Causes leaf spots and browning of leaves

Overwinters as mycelium/spores in infected plant debris. Spores may be disseminated during rains to susceptible plant when they germinate directly through wound. Forms conidia that are further spread to cause infection

Control methods:
Apply systemic fungicide to affected trees. Use resistant trees when planting

Growth stage: Mature tree

Disease name: Alternaria leaf spot

Synonym: Alternaria tenuissima (Nees) Wiltshire

Host name: Pinus radiata

Host common name: Radiate pine

Affected part: Pine needles