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Renanthera abbreviated as Ren is a genus of orchids belonging to the orchid family, Orchidaceae.




Image of Renanthera plant at Google

Renanthera is a genus of orchids belonging to the orchid family, Orchidaceae. Renanthera is abbreviated as Ren in horticultural trade. This is a genus of large scrambling monopodial epiphytic and terrestrial species. They are distributed from India, New Guinea, and through to the Philippines.

The species in this genus produce a branched inflorescence that has many flowers. They flowers are from yellow and orange to red in color. These flowers possess large lateral sepals.

This genus has following species
– Renanthera annamensis
– Renanthera auyongii
– Renanthera bella
– Renanthera citrina
– Renanthera coccinea
– Renanthera edefeldtii
– Renanthera elongata
– Renanthera histrionica
– Renanthera imschootiana
– Renanthera matutina
– Renanthera monachica
– Renanthera philippinensis
– Renanthera pulchella
– Renanthera storiei
– Renanthera vietnamensis

Growing/Caring conditions for Renanthera
– 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.
– Repotting 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.

To avoid the above, fungicides like Captan, Dithane, Agrosan and Ceresan are very effective.

– 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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