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Some plants and trees are resistant to juglone including some species of maple (Acer), birch (Betula), and beech (Fagus). [citation needed] It is highly toxic to many insect herbivores. However, some of them, example Actias luna (Luna moth), can detoxify juglone (and related naphthoquinones) to non-toxic 1,4,5-trihydroxynaphthalene.
Plants can cause reactions ranging from laminitis (found in horses bedded on shavings from black walnut trees), anemia, kidney disease and kidney failure (from eating the wilted leaves of red maples), to cyanide poisoning (from the ingestion of plant matter from members of the genus Prunus) and other symptoms.
Walnut trees are any species of tree in the plant genus Juglans, the type genus of the family Juglandaceae, the seeds of which are referred to as walnuts.All species are deciduous trees, 10–40 metres (33–131 ft) tall, with pinnate leaves 200–900 millimetres (7.9–35.4 in), with 5–25 leaflets; the shoots have chambered pith, a character shared with the wingnuts (Pterocarya), but not ...
Another possible source for the vernacular name is the fact that the flowers and seedpods can dangle directly from the trunk in a way reminiscent of Judas's possible method of suicide. [ 4 ] A sermon illustration on the deadly effects of succumbing to temptation refers to a false idea that the Judas tree killed bees drawn to it: "Dr. Cuyler ...
The toxicity of L. camara to humans is undetermined, with several studies suggesting that ingesting unripe berries can be toxic to humans. [149] Other studies have found evidence which suggests that ingestion of L. camara fruit poses no risk to humans and are in fact edible when ripe. [150] Ligustrum spp. privet, amur, wax-leaf Oleaceae
Forestry workers fell a 40ft (12m) Sitka spruce tree in Northumberland's Kielder Forest before it makes the 330 mile (531km) journey south to stand at the foot of Big Ben in Parliament Square, London.
The aphids can cause stunted growth in trees with heavy infestations rendering badly damaged trees unsellable. [1] Other species of adelgids also infest fir trees, those include the pine bark adelgid, the Cooley spruce gall adelgid (Adelges cooleyi), and the eastern spruce gall adelgid (Adelges abietis). [3] Another serious pest are bagworms ...
The plant pathogenic fungus Leucostoma kunzei (formerly Valsa kunzei) is the causal agent of Leucostoma canker (also known as Cytospora canker or spruce canker), a disease of spruce trees found in the Northern Hemisphere, predominantly on Norway spruce (Picea abies) and Colorado blue spruce (Picea pungens).