dead Prunus laurocerasus, Phytophthora? and coral spot

[wrekin tree care]

hi all

 

Lokked a a cherry laral today and im new to asessing diseases and stuff but im i right in think it has Phytophthora after looking in my books. i has white gummy ooze about 6inches up on main them. it also has coral spot all over but i presume this came afterwards. other plants near by are starting to show signs of die back, another laural and a rhododendron. i have attached some photos any thoughts

[Fungus]

cherry laural ... Phytophthora ... has white gummy ooze about 6inches up on main them. it also has coral spot all over but i presume this came afterwards. other plants near by are starting to show signs of die back, another laural and a rhododendron.

 

Whitish to pinkish oozing of Prunus is caused by a Pseudomonas bacteria, blackish oozing by a Phytophthora species. And the coral spot fungus probably is Nectria cinnabarina.

[wrekin tree care]

i have done a bit of research and Pseudomonas bacteria on laural causes leaf damage holes etc.. and can lead to cankers is this correct? i could not see any on the tree just the ooze and coral spot

[treeseer]

You might try moving mulch and soil so you can inspect the whole stem. Buried flares invite infections.

[Tony Croft aka hamadryad]

planted in amongst toxic rhododendrons it was bound to have a hard time and be susceptible.

[Fungus]

i have done a bit of research and Pseudomonas bacteria on laural causes leaf damage holes etc.. and can lead to cankers is this correct? i could not see any on the tree just the ooze and coral spot

 

For the bacterial canker causing Pseudomonas syringae pv mors-prunorum oozing gum from the trunk, you'll have to look for this:

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[treeseer]

planted in amongst toxic rhododendrons it was bound to have a hard time and be susceptible."

 

toxic meaning...infected? infectable? It may always be susceptible, but burying the tree deep is just asking for trouble. And uncovering the flare is part of the diagnosis--no Rx without an RCX.