Colony morphology of ex-holotype ICMP 17027 after 10-days incubation at 20°C in the dark
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P. agathidicia growth on V8 |
P. agathidicida oospores Oospores of P. agathidicida in the roots of kauri seedlings inoculated with P. agathidicida. The root has been cleared with potassium hydroxide and bleached with peroxide, before being stained with Trypan Blue |
P. agathadicida disease symptom Excavated lesion, with outer bark removed showing extent of disease-front |
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. agathidicida lesion on kauri tree Close up of gum oozing out of lower trunk lesions of a young kauri tree at Maungaroa Ridge, Piha region of Waitakere Regional Park |
Boot wash to station to control spread of P. agathidicida Use of hypochlorite solution applied through a “livestock drench-gun”, integrated with a soil grate to allow potentially contaminated soil to be collected |
P. agathidicida lesion on kauri tree Gum oozing out of longitudinal lesion |
P. agathidicia growth on PDA Colony morphology of ex-holotype ICMP 17027 after 10-days incubation at 20°C in the dark |
P. agathidicia disease symptoms on kauri Crown decline of mature kauri, with branchlets with little or no leaves |
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 |
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). |