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This article is a list of diseases of hydrangeas (Hydrangea macrophylla). Bacterial diseases. Bacterial diseases; Bacterial blight Pseudomonas solanacearum:
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Hydrangea (/ h aɪ ˈ d r eɪ n dʒ ə / [3] [4] or / h aɪ ˈ d r eɪ n dʒ i ə / [5]), commonly named the hortensia, is a genus of more than 70 species of flowering plants native to Asia and the Americas. By far the greatest species diversity is in eastern Asia, notably China, Korea, and Japan.
Compared to other Hydrangea species, oakleaf hydrangea is more susceptible to Fusarium root rot; however, disease severity varies among cultivars with 'John Wayne' and Snowflake =‘Brido’ being the most tolerant. [20] The primary foliar disease in oakleaf hydrangea is Xanthomonas leaf spot, which is a bacterial disease. [19]
Hydrangea macrophylla is a species of flowering plant in the family Hydrangeaceae, native to Japan. It is a deciduous shrub growing to 2 m (7 ft) tall by 2.5 m (8 ft) broad with large heads of pink or blue flowers in summer and autumn. [2] Common names include bigleaf hydrangea, French hydrangea, lacecap hydrangea, mophead hydrangea, and ...
"Orange spots that form on the bottom or the underside of the leaves are hydrangea rust," read Epic Gardening's hydrangea guide. "The top of the leaf will turn yellow and the leaf will eventually die.
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