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Phalaenopsis bellina has a fibrous root system, with roots usually emerging near the base of the stem. The root is composed of a spongy outer layer called the velamen , which is responsible for protecting underlying cells from UV rays and physical damage, as well as absorbing water.
Phalaenopsis (/ ˌ f æ l ɪ ˈ n ɒ p s ɪ s /), also known as moth orchids, [2] is a genus of about seventy species of plants in the family Orchidaceae.Orchids in this genus are monopodial epiphytes or lithophytes with long, coarse roots, short, leafy stems and long-lasting, flat flowers arranged in a flowering stem that often branches near the end.
Fusarium wilt is a common vascular wilt fungal disease, exhibiting symptoms similar to Verticillium wilt. This disease has been investigated extensively since the early years of this century. The pathogen that causes Fusarium wilt is Fusarium oxysporum (F. oxysporum). [1] The species is further divided into formae speciales based on host plant.
The following is a list of intergeneric hybrids recognised by the Royal Horticultural Society that includes species of Phalaenopsis as ancestors, as at February 2022: [6]. × Aeridopsis (Aerides × Phalaenopsis)
Therefore, it is important to have certified disease-free stock. Some promising biological control research is being done for orchid species. D. dadantii has been studied in commercially valuable Phalaenopsis orchids. Soft rot diseases caused by Dickeya spp is one of the most devastating diseases in orchid production. [26]
Orchid fleck dichorhavirus, commonly called Orchid fleck virus (OFV), is a non-enveloped, segmented, single-stranded (ss) RNA negative-strand virus, transmitted by the false spider mite, Brevipalpus californicus.
Phalaenopsis amabilis, commonly known as the moon orchid, moth orchid, [7] or mariposa orchid, [8] is a species of flowering plant in the orchid family Orchidaceae. It is widely cultivated as a decorative houseplant .
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 ]