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DownHome Harvest® 'Navaho' Thornless Blackberry is resistant to anthracnose, a common disease pest, but is susceptible to orange rust and double blossom disease.
Cercosporella rubi is a plant pathogenic fungus which causes blackberry rosette, [1] a disease that is also known as double blossom [2] or witches' broom [3] of blackberry. In infected plants, the symptoms that C. rubi causes are double blossoms as well as witches' brooms .
Thornless cultivars have been developed during the early 21st century. [8] [9] Unmanaged plants tend to aggregate in a dense tangle of stems and branches, [3] which can be controlled in gardens or farms using trellises. [1] [8] Blackberry shrubs can tolerate poor soils, spreading readily in wasteland, ditches, and roadsides. [3] [7] [10]
Rubus ulmifolius is a species of wild blackberry known by the English common name elmleaf blackberry or thornless blackberry and the Spanish common name zarzamora.It is native to Europe and North Africa, and has also become naturalized in parts of the United States (especially California), Australia, and southern South America.
Watch for foliar diseases such as leaf spots, rust, and blight. Remove infected leaves and twigs and dispose of these in the trash. ... Related: Plant This Thornless Blackberry Variety Now So You ...
Miscellaneous diseases and disorders; Alpine mosaic in Rubus Alpine mosaic agent, (a graft-transmissible agent of unknown identity) Blackberry sterility Cause unknown Brown berry disease (of black raspberry) Cause unknown Crumbly berries Various causes: poor pollination, genetic, virus, insect, nutrition, winter injury, water relations
Progeny from Logan's original plant was introduced to Europe in 1897. A prickle-free mutation of the loganberry, the 'American Thornless', was developed in 1933. The tayberry is a similar raspberry-blackberry hybrid.
The marionberry plant is a vigorously growing trailing vine, with some canes up to 20 feet (6.1 m) long. [ 1 ] [ 3 ] The vines have many large spines, and the fruiting laterals are long and strong, producing many berries. [ 6 ]