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Forestry diseases in New Zealand







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Acacia rusts Uromycladium spp.

Agrocybe parasitica, a native heart rot fungus of hardwoods


Apiognomonia veneta Plane anthracnose

Armillaria root rot

Aulographina eucalypti a leaf-spot disease of Eucalyptus in New Zealand

Bacterial leaf spot and canker caused by Pseudomonas syringae pv. syringae


Bacterial stem canker caused by Pseudomonas syringa pv. syringae

Barron Road Syndrome, a disease of ash eucalypts

Black stain root disease caused by Leptographium spp.

Boron deficiency

Botryosphaeria dothidea Flagging of giant redwood

Cersospora eucalypti a leaf-spot disease of Eucalyptus in New Zealand

Coltricia schweinitzii (Phaeolus schweinitzii) Wood decay fungus on radiata pine

Cyclaneusma needle-cast

Cypress canker Monochaetia unicornis and Coryneum cardinale


Cytospora eucalypticola


Cyttaria galls

Diplodea leader dieback, crown wilt, and whorl canker caused by Sphaeropsis sapinea

Dothistroma pini Dothistroma needle blight

Dutch Elm Disease Ophiostoma novo-ulmi

Elm leaf spot Phloeospora ulmi

Flagging of giant redwood caused by Botryosphaeria dothidea


Gloeocystidiellum sacratum Peniophora root and stem canker

Guava rust Puccinia psidii (Not present in New Zealand)

Hainesia lythri, fungus disease of Eucalyptus seedlings

Hendersonia eucalyptorum a leaf-spot disease of Eucalyptus in New Zealand

Hysterographium fraxini


Junghuhnia vincta Junghuhnia root disease

Kabatina thujae


Leafspots, eucalyptus

Lepteutypa podocarpi a fungi associated with dieback of totara

Leptographium in radiata pine


Lophodermium spp.

Marssonina brunnea poplar anthracnose

Marssonina castagnei poplar anthracnose

'Measles' of eucalyptus

Melampsora leaf rust

Meria laricis, needle cast fungus of larch

Mycosphaerella, a leaf-spot disease of Eucalyptus in New Zealand

Microsphaera alphitoides Oak powdery mildew

Microthyrium eucalypti a leaf-spot disease of Eucalyptus in New Zealand

Mundulla yellows (not present in New Zealand)

Nectria Flute Canker Nectria fuckeliana

Needle cast of larch, Meria laricis

Needle Diseases of Radiata Pine (Cyclaneusma needle cast, Dothistroma needle blight and Physiological Needle Blight)

New Zealand white root rot Rosellinia aff. necatrix


Oak powdery mildew Microsphaera alphitoides

Ophiostoma novo-ulmi
Dutch Elm Disease 

Pachysacca pusilla


Peniophora root and stem canker (Causal organism
Gloeocystidiellum sacratum)


Phaeocryptopus gaeumannii Swiss needle cast disease

Phaeolus schweinitzii, Wood decay fungus on radiata pine (synonym, Coltricia schweinitzii)

Phaeophleospora eucalypti a leaf-spot disease of Eucalyptus in New Zealand
See also MAPPING SEPTORIA LEAF BLIGHT from Forest Health News 164, July 2006


Phloeospora ulmi Elm leaf spot 

Phomopsis dieback of cypresses

Phomopsis juniperovora


Phomopsis pseudotsugae

Physiological Needle Blight of radiata pine

Phytophthora diseases

Phytophthora causing crown dieback of Eucalyptus

Plane anthracnose Apiognomonia veneta


Poplar anthracnose Marssonina brunnea and Marssonina castagnei

Pseudocercospora

Pseudomonas syringae pv. syringae Bacterial leaf spot and canker

Pseudomonas syringae pv. syringae Bacterial stem canker of pine

Rhizosphaera kalkhoffii

Rosellinia root rot (Rosellinia aff. necatrix)


Sarcostroma sp. (Previously Seimatosporium), a disease of Eucalyptus in New Zealand

Septoria leaf spot Phaeophleospora eucalypti (formerly known as Septoria pulcherrima)
See also MAPPING SEPTORIA LEAF BLIGHT from Forest Health News 164, July 2006

Seiridium unicorne and S. cardinale Cypress canker


'SOFT WOOD' (Lack of rigidity in the canterbury hill country radiata)

Sphaeropsis sapinea Diplodea disease

Sporothrix sp.


Stigmina thujina - A needle blight of Lawsons cypress?


Swiss needle cast disease Phaeocryptopus gaeumannii

Trimmatostroma bifarium a leaf-spot disease of Eucalyptus in New Zealand

Trimmatostroma excentricum

Upper mid-crown yellowing (UMCY) of radiata pine

Uromycladium rusts of acacia

Verticicladiella root disease