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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.
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.
At the start, there were few such engineered chestnut trees. For seed multiplication, grafting could work. [49] Normal tree growth requires 6, 7, or even 8 years before a chestnut will flower. [49] However orchard management may accelerate pollen production to 2–3 years (although still without fruiting). [49]
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.
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).