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Odontoglossum ringspot virus (ORSV) is a plant pathogenic virus that belongs to the family Virgaviridae. 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]
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 ...
The scale's activities can result in stress for the plant, causing reduced growth and giving it a greater susceptibility to plant diseases. [12] Mutualistic Formica fusca ants tending a herd of mealybugs. Scale insects in the genus Cryptostigma live inside the nests of neotropical ant species. [13]
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Notable early examples of live plant harbored pests—such as beech scale, chestnut blight, and white pine blister rust—led to the Plant Quarantine Act of 1912 and regulations from the US Department of Agriculture in 1919. Despite these and subsequent regulations, insects and pathogens have continued to be introduced through live plants.
Using formulations of neem oil, which is an organic broad spectrum pesticide, insecticide, fungicide and miticide controls mites and insects such as whitefly, aphid, scale, and mealy bugs, and additional fungus diseases like black spot, rust, mildew, and scab. Neem oil can be used on house plants, flowers, vegetables, trees, shrubs and fruit ...
The large spikes of flowers are very impressive, and the large strappy leaves are interesting even when the plant isn’t blooming. Boat orchids prefer humidity around 50% and bright, indirect light.
Fiorinia theae is a polyphagous scale insect of woody plants, infesting the underside of the leaves. Apart from tea plants in Asia, ornamental Camellia and Ilex species are the main hosts. Many other plants are infested less regularly. [5] ScaleNet lists more than 20 genera from 18 plant families as hosts, including various crops and ornamental ...