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Platanthera is a genus of orchids belonging to the orchid family, Orchidaceae.




Image of Platanthera plant at Google

Platanthera is a genus of orchids belonging to the orchid family, Orchidaceae. The genus Platanthera belongs to the subfamily Orchidoideae. This comprises of about 100 species of orchids. They are distributed throughout the temperate regions of the Northern Hemisphere.
About 85 species are clearly defined out of 400.
– 52 species from temperate Asian countries (China, Japan, Korea, Taiwan),
– 13 species from tropical Asian countries (Burma, Indonesia, Papua New Guinea, the Philippines), 37 species from North America north of Mexico, 7 species from Europe. They include:
North America:
– Platanthera aquilonis
– Platanthera blephariglottis
– Platanthera brevifolia
– Platanthera chorisiana
– Platanthera ciliaris
– Platanthera clavellata
– Platanthera cristata
– Platanthera dilatata
– Platanthera flava
– Platanthera grandiflora
– Platanthera hookeri

Asia:
– Platanthera algeriensis
– Platanthera brevicalcarata
– Platanthera chorisiana
– Platanthera florenti
– Platanthera fuscensis
– Platanthera holmboei

Europe:
– Platanthera algeriensis
– Platanthera bifolia
– Platanthera chlorantha
– Platanthera holmboei
– Platanthera hyperborea
– Platanthera obtusata var. oligantha

North Africa:
– Platanthera algeriensis
– Platanthera kuenkelei

Azores
– Platanthera azorica
– Platanthera micrantha

Pacific
– Platanthera holochila

Growing/Caring conditions for Platanthera:
– Select a location which receives natural sunlight.
– Care should be taken that the location is not too hot.
– Indirect light is preferred in summer.
– Plant the orchid in the location.
– Water the orchid well.
– Care should be taken, not to overwater the orchid.
– Keep the orchid moist.
– Plant blooms in the fall to spring
– Re-potting annually is better for some orchids.
– Plant the orchid in a potting mix of mulch for tropical plants.
– Fertilize the orchid with plant food that is specific for orchids.
– Control the way roots get their oxygen because it is an important factor when they grow.
– This plant needs rich and fertile soil.
– This plant needs well draining soil.
– Add tree fern fibers (for small plants), several pieces of coarse fir bark, or sphagnum moss for draining.
– Dead growth and branches should be removed.

The following fungal and bacterial infections are known to attack the plant
– Leaf spot is caused by Colletotrichum and Gleosporium
– Leaf blight – caused by Pythium
– Collar blocth – caused by Penicilium thomii
– Collar rot – caused by Sclerotium
– Orchid wilt – caused by Sclerotium rolfsli
– More than 32 diseases are known to occur on orchids with the most common are Cymbidium mosaic virus.
– All infected plants should be isolated to prevent spreading of the disease for avoiding.
– The most commonly reported insects pests on orchids are thrips, aphids, spidermite, soft scale, mealy bugs, orchid weevil, snail and slugs.
– They feed on tender young shoot, suck the sap and damage the young bud and shoot and also act as the carrier of different diseases.
– These can be controlled by effective insecticides like Parathion, Malathion, BHC, Aldrin, Dieldrin, etc. Metaldehyde has proved to be very effective in killing slugs and snails.





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