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The sugar maple is easy to differentiate by clear sap in the petiole (leaf stem); Norway maple petioles have white sap. [citation needed] The tips of the points on Norway maple leaves reduce to a fine "hair", while the tips of the points on sugar maple leaves are, on close inspection, rounded. On mature trees, sugar maple bark is more shaggy ...
Rhytisma acerinum is a plant pathogen that commonly affects sycamores and maples in late summer and autumn, causing tar spot.Tar spot does not usually have an adverse effect on the trees' long-term health. [1]
This fungus attacks the leaves of the Acer platanoides (Norway maple) in North America, [1] and in Great Britain and/or Ireland, Acer palmatum (also known as the Japanese Maple or Smooth Japanese Maple). [2]
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Sawadaea tulasnei is a fungus that causes powdery mildew on tree leaves. This fungus attacks the leaves of the Acer platanoides (Norway maple) in North America, Great Britain, and Ireland, Acer palmatum (also known as the Japanese maple or smooth Japanese maple). [34]
The fungal pathogen Cristulariella depraedans is found in Europe and North America and mostly affects trees in the genus Acer.Trees affected in Germany and Britain are primarily the sycamore (A. pseudoplatanus) and the Norway maple (A. platanoides), while in North America the most affected are A. platanoides, the red maple (), the sugar maple (A. saccharum), the silver maple (A. saccharinum ...
Carelessness with machinery or taps in sugar bushes is a frequent cause of decline in sugar maple and black maple. [citation needed] Unusual weather conditions can also lead to maple decline. A classic example occurred across southern Quebec in 1981 when an exceptional February thaw destroyed the snow cover. Later, hard frost penetrated the ...
Too much sunlight can also be a problem; it can cause leaves at the top of the plant to turn yellow or brown with sunscald. The solution: Peace lilies grow best in bright, ...