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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.
As herbicides are pesticides used to kill unwanted plants, silvicides are special pesticides (cacodylic acid or MSMA, for instance) used to kill brush and trees. They can wipe out entire forests or specific, unwanted forest species.
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
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 ...
It can often be difficult in practice to distinguish allelopathy from resource competition. While the former is caused by the addition of a harmful chemical agent to the environment, the latter is caused by the removal of essential resources (nutrients, light, water, etc.). Often, both mechanisms can act simultaneously.
Consumers are recommended to inspect spruce trees for this disease prior to purchase to prevent introduction of the fungus into a location that is void of the disease. Homeowners with spruce trees should inspect their tree(s) in late summer and early spring for symptoms of Weir’s cushion rust, and, if found, treat the disease before it can ...
Highly Toxic: a gas that has a LC 50 in air of 200 ppm or less. [2] NFPA 704: Materials that, under emergency conditions, can cause serious or permanent injury are given a Health Hazard rating of 3. Their acute inhalation toxicity corresponds to those vapors or gases having LC 50 values greater than 1,000 ppm but less than or equal to 3,000 ppm ...
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).