needle cast tree disease

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Lirula needle cast Photo: Chad Behrendt Lirula needle cast is caused by the fungus Lirula macrospora. This disease can be found on white and Colorado blue spruce. ... on the terminal ends of the branches, usually are brighter green than other needles located on the tree. After an initial Lirula infection occurs, these current year needles remain green and no symptoms of ...

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