Search results
Results from the WOW.Com Content Network
Beech leaf disease is a newly discovered lethal disease of beech trees believed to be caused by the nematode Litylenchus crenatae mccannii. [1] The symptoms of the disease appear as a dark green, interveinal banding pattern on the lower canopy foliage, eventually spreading throughout the tree.
An infested tree will often generate a second round of often smaller, thinner leaves, but it must tap into its energy stores to do so. A healthy tree can only do this a few years in a row before ...
It also may not affect the entire tree; sometimes leaves persist only on scattered branches. [4] Marcescence is most obvious in deciduous trees that retain leaves through the winter. Several trees normally have marcescent leaves such as oak ( Quercus ), [ 5 ] beech ( Fagus ) and hornbeam ( Carpinus ), or marcescent stipules as in some but not ...
The areas of leaves that are consumed by the amber marked birch leafminer larva turn brown. Because people often do not see the early signs of birch leafminer feeding, it often appears the tree has suddenly dried up or become diseased.
The tiny insect larva is attacking black locust trees.
Beech wood tablets were a common writing material in Germanic societies before the development of paper. The Old English bōc [54] has the primary sense of "beech" but also a secondary sense of "book", and it is from bōc that the modern word derives. [55] In modern German, the word for "book" is Buch, with Buche meaning "beech tree".
Myrtle wilt, a parasitic fungus, (Chalara australis) attacks myrtle beech when the air or water-borne spores settle on open wounds. Myrtle wilt only infects N. cunninghamii and is a deadly pathogen that infects roots and trunks. It causes tree crown wilting and foliage to turn brown and yellow.
An adult beech scale insect has a soft body, is yellow in color, ranges from 0.5 to 1.0 millimeter long, and has an elliptical shape. [1] The beech scale insect also has a stylet that it uses to penetrate the bark of the tree for feeding purposes. There are no male beech scale insects and the female insects reproduce parthenogenetically. [1]