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Weeping Higan Cherry trees are rather prone to problems, particularly in dry soil. A type of bacterium can cause leaf spots and twig cankers. Small, reddish spots dry and drop out. A fungus can cause reddish spots which drop out leaving shot holes. Once the holes appear the leaves may fall from the tree and the disease is worse in wet weather.
Wood decay caused by Serpula lacrymans (called true dry rot, a type of brown-rot). Fomes fomentarius is a stem decay plant pathogen Dry rot and water damage. A wood-decay or xylophagous fungus is any species of fungus that digests moist wood, causing it to rot.
Some trees were sprayed in 1945 at the end of the growing season and some trees were not. All of the trees that were sprayed in the fall of 1945 survived and produced fruit in 1946. Yields for the unsprayed trees that survived were 36 pounds per tree. Sprayed trees yielded nearly three times more than the controls with 107 pounds per tree. [22]
Shot hole disease is a major concern of the stone fruit industry. It is estimated that 80% of the California almond crop may be infested with shot hole disease, resulting in a potential yield loss of 50-75%. [3] In the 1930s, it was found that applications of Bordeaux mixture reduces shot hole disease on peaches from 80% to 9%.
Orange or yellow paints are used for harvest boundaries, and trees within those areas have blue, orange, green, or yellow paint, depending on whether they are to be taken or spared.
The tiny insect larva is attacking black locust trees.
The stems are armed with clusters of up to about 10 red to pink [10] spines, which may be 3 cm (1.2 in) long [10] and are barbed and sharp enough to easily penetrate leather gardening gloves. [12] The stems and fruits also have many spines or "glochids" about 1 mm (0.04 in) long [ 10 ] that can detach and stick in the skin.
A tree hollow or tree hole is a semi-enclosed cavity which has naturally formed in the trunk or branch of a tree. They are found mainly in old trees, whether living or not. They are found mainly in old trees, whether living or not.