Search results
Results From The WOW.Com Content Network
Phellodendron amurense is a species of tree in the family Rutaceae, commonly called the Amur cork tree. It is a major source of huáng bò ( Chinese : 黄 柏 or 黄 檗 ), one of the 50 fundamental herbs used in traditional Chinese medicine .
Phellodendron, or cork-tree, is a genus of deciduous, dioecious trees in the family Rutaceae, native to east and northeast Asia. It has leathery, pinnate leaves and yellow, clumped flowers . The name refers to the thick and corky bark of some (but not all) species in the genus.
Non-native invasive species can disrupt ecosystems because they do not have natural predators, or other ecological checks-and-balances. Thus, with less competition from native species, non-native populations can explode. [9] Invasive insects and pathogens have eliminated entire tree species from forests of the United States in as little as decades.
These provinces are in the far northeast of China, near the Heilong Jiang river, known in Russian as the Аму́р , and Phellodendron amurense is commonly known as the Amur cork tree. Phellodendron chinense ( 川 黄 柏 , i.e. "lowland Phellodendron") producing areas include Sichuan , Hubei , Guizhou , Yunnan , and Guangxi .
certain Ophiostoma species which cause Dutch elm disease. Ophiostoma ulmi; Ophiostoma himal-ulmi; Ophiostoma novo-ulmi; Pseudogymnoascus destructans; Uredo rangelii; Suillus and Rhizopogon are considered invasive in parts of the Southern Hemisphere, as they promote Pinaceae tree invasion. [2]
Plant diseases are diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). [1] Organisms that cause infectious disease include fungi , oomycetes , bacteria , viruses , viroids , virus -like organisms, phytoplasmas , protozoa , nematodes and parasitic plants . [ 2 ]
It has been introduced to many tropical areas, and has become a mildly invasive species in Hawaii, Seychelles, Ascension Island and the Society Islands. It is very widely grown in temperate zones as a houseplant. The common name "Swiss cheese plant" is also used for the related species from the same genus, Monstera adansonii. [5]
Significant variation in symptoms is seen between diseases, though some symptoms are expressed across species. On a macroscopic scale, plants infected with a X. fastidiosa-related disease exhibit symptoms of water, zinc, and iron deficiencies, [27] manifesting as leaf scorching and stunting in leaves turning them yellowish-brown, gummy substance around leaves, [27] fruit reduction in size and ...