Burrknot
Encyclopedia
Burrknot is a tree disorder, which is caused by formation of adventitious root primordia. Although Previously classified as disease, is now classifed as a disorder, as it is no longer believed to be pathogenic.
First looks like a smooth orange bulge growing from the stem or a branch, later multiple adventitious roots form.
, often found on apple tree M ( Malling ) and MM ( Malling-Merton ) rootstocks. At onset it begins to look like a smooth orange bulge growing from the stem or a branch, later, during one to three years, multiple adventitious roots begin to form.
When located on the roots, it is considered to be not very dangerous, but it makes it easier for diseases to infect the tree, and leaves it more susceptible to insects. When many burrknots are present on various location in the tree, it can make the tree unproductive.
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First looks like a smooth orange bulge growing from the stem or a branch, later multiple adventitious roots form.
Description of the Disorder
The occurrence of Burrknot is quite common among rootstockRootstock
A rootstock is a plant, and sometimes just the stump, which already has an established, healthy root system, used for grafting a cutting or budding from another plant. The tree part being grafted onto the rootstock is usually called the scion...
, often found on apple tree M ( Malling ) and MM ( Malling-Merton ) rootstocks. At onset it begins to look like a smooth orange bulge growing from the stem or a branch, later, during one to three years, multiple adventitious roots begin to form.
When located on the roots, it is considered to be not very dangerous, but it makes it easier for diseases to infect the tree, and leaves it more susceptible to insects. When many burrknots are present on various location in the tree, it can make the tree unproductive.
Treatment
It is recommended to protect trees from moisture and shadow at the burrknot location, and to prevent infestation by synanthedon myopaeformisSynanthedon myopaeformis
The Red-belted Clearwing is a moth of the family Sesiidae. It is found in Europe, the Near East and North Africa.The wingspan is 18-26 mm. The length of the forewings is 9-11 mm...
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