Gardening Answers Knowledgebase
Knowledgebase record #685
What is the disease causing needle drop, and even killing in some cases, Cedrus trees in our area? Is there a fungicide recommended to help control the disease, and if so, what timing is recommended?
I can't be absolutely certain what the cause might be, but taking a look at some Northwest integrated pest management resources could provide ideas on the likely culprits.
Washington State University in Puyallup has a document indexing plant hosts of various pathogens, and for Cedrus they list Sirococcus species as well as Phomopsis.
There are discussions on the topic of Cedrus blights at University of British Columbia Botanical Garden's online forum which mention tip blight sometimes appearing in tandem with borers or mites.
|Keywords||Cedrus, Trees--Diseases and pests--Washington|
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August 12 2015 11:50:30