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The chestnut cultivar Colossal originates from the USA - California Central Valley. It is a Castanea sativa × Castanea crenata hybrid that is cold hardy to −20 °F (−29 °C). The tree can be grown in Zones 4-8, blooms early, and is pollen sterile. Colossal is chestnut blight, root rot and kernel rot susceptible. [1]
The Precoce Migoule is a chestnut hybrid (CA 48), a natural cross between a European chestnut (Castanea sativa) and a Japanese chestnut (Castanea crenata). It was discovered by J. Dufrenoy at the orchard of Migoule in Brive-la-Gaillarde. The tree is vigorous and erect growing with growth of a metre (3 ft) or more in a season if the conditions ...
Young tree in natural habitat American chestnut male (pollen) catkins. Castanea dentata is a rapidly-growing, large, deciduous hardwood eudicot tree. [20] A singular specimen manifest in Maine has attained a height of 115 feet (35 m) [21] Pre-blight sources give a maximum height of 100 feet (30 m) and a maximum circumference of 13 feet (4.0 m). [22]
Marigoule is the name of a french hybrid of chestnut (synonym M.15 or CA 15), cross between a European chestnut (Castanea sativa) and Japanese (Castanea crenata). In 1986, it originated from a Migoule orchard in Ussac in Corrèze. Marigoule (a contraction of Marron of Migoule) is a very tasty chestnut.
Bark of C. sativa (sweet chestnut). Chestnut trees are of moderate growth rate (for the Chinese chestnut tree) to fast-growing for American and European species. [4] Their mature heights vary from the smallest species of chinkapins, often shrubby, [5] to the giant of past American forests, C. dentata that could reach 60 metres (200 feet).
The equation for exponential mass growth rate in plant growth analysis is often expressed as: = Where: M(t) is the final mass of the plant at time (t). M 0 is the initial mass of the plant. RGR is the relative growth rate. RGR can then be written as:
The tree is a mid-season hybrid variety, upright with moderate vigor and medium stature. The medium stature allows denser orchards than other hybrids such as Marigoule . Maraval is mainly used as root stock because of its good graft compatibility with many chestnut varieties.
Marsol is the most sensitive chestnut cultivary to Dryocosmus kuriphilus - the chestnut gall wasp, and very sensitive to the codling moth, [1] fairly sensitive to root asphyxiation, resistant to mosaic virus, slightly susceptible to chestnut blight. Trees are of medium height with a long trunk and branches higher up.