Close up of gum oozing out of lower trunk lesions of a young kauri tree at Maungaroa Ridge, Piha region of Waitakere Regional Park
Photo Gallery
Site will be retired 9/1/2026
This site is no longer being developed and will be retired on September 1, 2026. Please contact us if you have any questions or would like to provide support to continue the project.
|
P. agathidicida lesion on kauri tree  |
P. agathidicia oogonia  P. agathidicida oogonia with SEM (top) and light microscopy (bottom) |
P. agathidicia sporangia  Differentiation of the cytoplasm within papillate sporangia into acid fuchsin stained zoospores |
|
P. agathadicida disease symptom  Excavated lesion, with outer bark removed showing extent of disease-front |
P. agathidicia disease symptoms on kauri  Crown decline of mature kauri, with branchlets with little or no leaves |
P. agathidicida lesion on kauri tree  Gum oozing out of longitudinal lesion |
|
Mat to control spread of P. agathidicida  Jogger running over a plastic-reinforced, foam-mat containing a 2% solution of Trigene™ Advance (quaternary ammonium compound) as part of a cross-country event, in the Waitakere Regional Park |
Tāne Mahuta “Lord of the Forest” kauri tree  Tāne Mahuta “Lord of the Forest” is a giant kauri tree (approximately 47 metres in height) in the Waipoua Forest of Northland Region, New Zealand. Its age is unknown but is estimated to be between 1,250 and 2,500 years |
P. agathidicida sporangium  Globose to ovoid-ellipsoid, papillate sporangium |
|
Comparative gametangial morphology of Phytophthora Clade 5 species  Comparative gametangial morphology of Phytophthora Clade 5 species, with SEM (top) and light microscopy (bottom). P. heveae has smooth walled oogonia with funnel-shaped, amphigynous antheridia. P. agathidicida has mildly stipulate oogonia with globose amphigynous antheridia. P.cocois has mildly bullate oogonia with reflexed amphigynous antheridia. P. castaneae has coarsely bullate oogonium with rugose protuberances and narrow amphigynous antheridia (Weir et al. 2015). |
P. agathidicida growth on CMA  Diffuse, non-patterned, colony morphology of ICMP 16471 (the original “Gadgil isolate”) after 10-days incubation at 20°C in the dark |
P. agathidicia growth on PDA  Colony morphology of ex-holotype ICMP 17027 after 10-days incubation at 20°C in the dark |