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Lupinus albus beans, cooked and pickled in brine.. The beginning of lupin cultivation in the Old World is sometimes associated with Ancient Egypt. [4] It is more likely, however, that white lupin was originally introduced into cultivation in ancient Greece, where its greatest biodiversity was concentrated and where wild-growing forms have been preserved until today (ssp. graecus). [5]
Norway maple, red maple and sugar maple are the species most commonly affected. The trouble often starts after insect-induced defoliation, which weakens the trees and makes them more susceptible to secondary pathogens. Early signs of decline include small or scorched foliage, and premature fall colors on some of a tree's branches.
Lupinus albifrons, silver lupine, white-leaf bush lupine, or evergreen lupine, is a species of lupine (lupin). It is native to California and Oregon , where it grows along the coast and in dry and open meadows, prairies and forest clearings.
A decade on from the arrival of the disease in the UK, the Woodland Trust wants to see action to boost British nurseries to protect our woods. ‘Real threat’ of importing new tree diseases as ...
The species are mostly herbaceous perennial plants 0.3–1.5 metres (1–5 feet) tall, but some are annual plants and a few are shrubs up to 3 m (10 ft) tall. An exception is the chamis de monte (Lupinus jaimehintonianus) of Oaxaca in Mexico, which is a tree up to 8 m (26 ft) tall.
Eutypella canker is a plant disease caused by the fungal pathogen Eutypella parasitica. This disease is capable of infecting many species of maple trees and produces a large, distinguishable canker on the main trunk of the tree. Infection and spread of the disease is accomplished with the release of ascospores from perithecia.
Slime flux, also known as bacterial slime or bacterial wetwood, is a bacterial disease of certain trees, primarily elm, cottonwood, poplar, boxelder, ash, aspen, fruitless mulberry and oak. A wound to the bark, caused by pruning, insects, poor branch angles or natural cracks and splits, causes sap to ooze from the wound. Bacteria may infect ...
All oak trees may display foliage marcescence, even species that are known to fully drop leaves when the tree is mature. [7] Marcescent leaves of pin oak (Quercus palustris) complete development of their abscission layer in the spring. [8] The base of the petiole remains alive over the winter. Many other trees may have marcescent leaves in ...
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