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Oak regeneration failure is a woodland phenomenon whereby insufficient oak seedlings and saplings are recruited into the canopy to replace dead mature oaks.The result is a local decline in oak numbers while other more shade-tolerant trees such as maple, lime, and ash may become more prominent.
Galls (upper left and right) formed on acorns on the branch of a pedunculate (or English) oak tree by the parthenogenetic generation Andricus quercuscalicis.. The large 2 cm gall growth appears as a mass of green to yellowish-green, ridged, and at first sticky plant tissue on the bud of the oak, that breaks out as the gall between the cup and the acorn.
In the 20 years since the detection of the plant pathogen, known as Sudden Oak Death, it has killed upwards of 50 million oaks and tan oaks, infecting more than 150 million oaks. It starves them ...
Together with larva of the filbertworm moth (Cydia latiferreana), the filbert weevil feeds on the acorns of several species of oak tree. In British Columbia, up to 66% of acorns from garry oak (Quercus garryana) were infected with these larvae. These acorns are still able to germinate, but the germination rate is lower than for uninfected nuts. [2]
These advocates who prefer the lean years of wild mast in the woods make a good point in that if one finds a heavily bearing apple tree or small stand of acorn-bearing oaks in a dearth year ...
It is a long-lived tree, with high-quality timber when well-formed. The acorns of the chestnut oak are a valuable wildlife food. [12] Q. montana trees mast or produce more acorns under warmer summer temperatures rather than cooler summer temperatures. The results of a "thin and burn treatment" proved that increased light and resources ...
Oaks support more than 950 species of caterpillar, many kinds of gall wasp which form distinctive galls, roundish woody lumps such as the oak apple, and a large number of pests and diseases. Oak leaves and acorns contain enough tannin to be toxic to cattle, but pigs are able to digest them safely. Oak timber is strong and hard, and has found ...
Quercus lyrata, the overcup oak, is an oak in the white oak group (Quercus sect. Quercus). The common name, overcup oak, refers to its acorns that are mostly enclosed within the acorn cup. [ 3 ] It is native to lowland wetlands in the eastern and south-central United States, in all the coastal states from New Jersey to Texas , inland as far as ...