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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. OFV causes necrotic and chlorotic lesions on the leaves [1] of many genera in the family Orchidaceae.
The virus has not often been reported in wild orchid populations. [2] It can be found in a wide variety of orchid genera [3] but does not infect plants other than orchids. [2] Once an orchid is infected, the virus spreads throughout the infected plant in a number of weeks. [4] Control measures may include sanitizing pruning equipment between ...
It is one of the most common viruses affecting cultivated orchids, perhaps second only to the Cymbidium mosaic virus. [1] It causes spots on leaves and colored streaks on flowers. [1] If a plant is also infected with the Cymbidium mosaic virus, it can lead to a condition called blossom brown necrotic streak. [1]
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Pages in category "Orchid diseases" The following 18 pages are in this category, out of 18 total. This list may not reflect recent changes. B. Botryodiplodia oncidii; C.
Symptoms can appear within 10 hours of exposure, Shrewsbury said. "Bites may look like raised, red areas with a small central blister on the skin," she said. "The bites are itchy and may be ...
These mites, also known as Pyemotes herfsi, have been previously confirmed to attack and feed on periodical cicada egg nests and can also cause an outbreak of bite rashes on humans, according to ...
Black rot targets a variety of orchids but Cattleya orchids are especially susceptible. [1] Pythium ultimum and Phytophthora cactorum are known to cause black rot in orchids. [1] Pythium ultimum is a pathogen that causes damping-off and root rot on plants. [2] Symptoms of this pathogen include stunting and chlorosis. [2]