Some species, as some Phalaenopsis , Dendrobium and Vanda , produce offshoots or plantlets formed from one of the nodes along the stem , through the accumulation of growth hormones at that point. These shoots are known as keiki, a keiki is a small plant that grows on a node along the flower spike where [...]
Archive for December, 2009
Posted in 
Division
Posted by admin on December 6th, 2009
Division simply means splitting the plant in to two or more parts each with at least one new shoot and each will produce a fully grown mostly flowering size plant that is capable of flowering the following season This is one of the simplest methods of producing more plants of the same variety or species. [...]
Back bulbs
Posted by admin on December 6th, 2009
Back bulb propagation is a method of producing a new plant from old previously flowered or unflowered back pseudobulbs which are usually leafless, plants grown this way may take 2 to 3 years or more to reach flowering size. Another simple method of propagation but this one may take many years to obtain a flowering [...]
Aerial cutting
Posted by admin on December 6th, 2009
Aerial cuttings are very common on many of the cane Dendrobiums such as Nobile. If placed under stressful growing conditions then some Dendrobiums will instead of developing flower buds will produce small plants in their place – fine for increasing your stock but not if you want flowers! Aerial cuttings are very easy to take [...]
Fungal
Posted by admin on December 4th, 2009
Petal Blight Botrytis cinerea is a fungus that spots orchid flowers. To infect, it requires water on the flower surface, so it is a problem when humidity levels are so high as to lead to water condensation on the flowers. Water persisting on flowers after a rain or watering will encourage Botrytis. Symptoms : Black [...]
Bacterial
Posted by admin on December 4th, 2009
Bacterial Brown Spot This disease is most prevalent in phalaenopsis, and is as deadly as black rot is with cattleyas. It is especially active under wet and coot conditions. Symptoms : Infection by Pseudomonas cattleyas, the bacterium involved, starts as a brown, watery blister on a leaf and quickly spreads, engulfing whole leaves. If it [...]
Viruses
Posted by admin on December 4th, 2009
Viruses Several viruses are known for orchids in cultivation. Three viruses are prevalent among orchids: cymbidium mosaic virus (CyMV), tobacco mosaic virus (TMV) and bean yellow mosaic. Symptoms are non-specific and can easily be confused with symptoms of bacterial and fungal diseases or even cultural problems. But plants with yellow to black streaks on the [...]
Pests
Posted by admin on December 4th, 2009
Scale Quite a few species of scale infest orchids. Scale insects secrete a hard, waxy covering that repels most pesticides unless a wetting agent is added. Their presence is often first noticed by the sticky “honeydew” that they secrete. Large infestations can be very difficult to eradicate even with highly toxic pesticides. Symptoms : Scale [...]
Temperature
Posted by admin on December 4th, 2009
Each orchid varieties need the different temperature. The minimum temperatures depending on the species. So you have to classified Orchid in three categories. Temperature Temperature should lower than 95° F. Category Approximate temperature Orchid Cool growing 50F- 70F Cymbidiums, Cypripediums, Odontoglossums, Miltonias Intermediate 56F- 75F Cattleyas, Epidendrums, Oncidiums, Laelias Warm growing 60F- 80F Vandas, Rhynchostylus [...]
