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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.
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 .
Associated plants may include mountain maple (Acer spicatum), serviceberry (Amelanchier spp.), hobblebush (Viburnum alnifolium), scarlet elder (Sambucus pubens), common blackberry (Rubus allegheniensis), beaked hazel (Corylus cornuta), southern mountain cranberry (Vaccinium erythrocarpum), minnie-bush (Menziesia pilosa), and rosebay ...
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]
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
Phragmidium violaceum is a plant pathogen native to Europe, Africa, and the Middle East. It primarily infects Rubus species. It has been used in the biological control of invasive blackberry species in Chile, Australia, and New Zealand. In 2005, it was discovered growing on Himalayan blackberry plants in Oregon.
The Swedish language also contributes two words on the UK list: smokeless tobacco Snus, pronounced (SNOOZ), and flygskam, the name of a movement that aims to discourage people from flying that ...
Rubus ursinus is a wide, mounding shrub or vine, growing to 0.61–1.52 metres (2–5 feet) high, and more than 1.8 m (6 ft) wide. [3] The prickly branches can take root if they touch soil, thus enabling the plant to spread vegetatively and form larger clonal colonies.