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We are compiling a worldwide A to Z of Bonsai database. The A to Z is written collaboratively by the people who use it and we would like to encourage anyone reading this page to contribute to what has become the worlds greatest encyclopedia of bonsai terms. Entries when they are made will be added to an editable list which will be checked prior to publication. Photos and images of the bonsai term can be added and links made to relevant web pages.
VERTICILLIUM WILT - This fungal infection transmitted via the ROOTS causes leaf yellowing and DIE-BACK in maples by attacking the SAPWOOD. It is difficult to detect so trees should be treated with a systemic FUNGICIDE as a preventative MEasure. If it occurs the infected soil must be carefully disposed of.
Image by kind permission of RHS.
VINE WEEVIL - The adult vine weevil is relatively harmless. It is the fat, creamy white, maggot-like larvae from which it develops which attacks the root system of the plant and can quickly kill a tree. The larvae will strip the ROOTS right up to the soil surface so the damage will not be evident until the tree shows signs of stress, begins to wilt and dies.
This insect is difficult to eradicate but treatMEnt with a soil INSECTICIDE should eradicate the larvae. If the larvae is found during re-potting then the roots should be washed clean before re-potting. Image by kind permission of RHS/Joyce Maynard
Thanks to - RHS/Joyce Maynard for use of the image
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