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Hyphodontia sambuci, the elder whitewash, is a basidiomycete fungal pathogen on deadwood, especially elder. [ 1 ] It is resupinate , forming a very thin structure which is white, pruinose (flour-like dusting) or chalky in appearance.
Whitewash, calcimine, kalsomine, calsomine, asbestis or lime paint is a type of paint made from slaked lime (calcium hydroxide, Ca(OH) 2) or chalk (calcium carbonate, CaCO 3), sometimes known as "whiting". Various other additives are sometimes used.
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A diluted neem oil spray repels insects and smothers those that come into contact with it, ultimately killing most insects that ingest the product within 1–3 days. [ citation needed ] Castor oil , derived from the castor tree seed, gives a coated surface an unpleasant taste to rodents, such as rats, moles, voles, and gophers that may ...
Herbicides are often used in these cleaning operations because the correct chemical at the correct dose (e.g. glyphosate or triclopyr) and time will kill only broad leaved species, leaving the conifers unharmed and free to grow. Chemical treatments may be applied by foliage sprays, mists or pellets.
The lichen is a generalist epiphyte of deciduous trees and is acidophilic. Its abundance appears to have increased generally since the 1970s, possibly in responses to changes in air pollution levels [ 2 ]
In tropical regions, leaves often flush red when young and in the phase of expansion to mature size. Red flushing is frequent among woody species, reported from 20 to 40% of the woody species in a site in Costa Rica, [7] in 36% of species in Barro Colorado Island, Panama, [8] about 49% of species in Kibale National Park, Uganda, [9] and in 83 of 250 species in Southern Yunnan, China. [10]
While the perceived risk of death by falling trees (a part of the "tree risk" complex) is influenced by media and often hyped (the objective risk has been reported to be close to 1 : 10.000.000, almost as low as death by lightning), [6] singular events have encouraged a "proactive" stance so that even lightly damaged trees are likely to be removed in urban and public traffic surroundings. [3]