Overview of Nervilia purpurata auct.
Nervilia purpurata auct. is a plant belonging to the Orchidaceae family, which commonly goes by the name of Purple Nervilia. It is an orchid species that is native to many Southeast Asian countries and can be found growing in a variety of forest types, including rainforests, bamboo forests, and mixed deciduous forests.
General Appearance
This plant is a small terrestrial orchid, growing to about 12 cm in height. It has a cylindrical, slightly curved, and hairy stem with a single basal leaf. The leaf blades are ovate or oblong and measure 2–9 cm long by 1–4 cm wide. The flower stalk arises from the axil of the basal leaf, reaching about 10 cm in height and bearing one or two pink to purple flowers. The sepals are broadly ovate, while the petals are narrower and curved, and the lip is deeply lobed with a white center.
Common Names
Some of the common names for Nervilia purpurata auct. include Purple Nervilia, Justicia nervilia, and Nervilia hackelii.
Uses
Some parts of this plant have been used in traditional medicine to treat various ailments, including respiratory problems and diarrhea. The leaves and rhizomes contain alkaloids and flavonoids that have been used as a diuretic in some cultures.
Growth Conditions for Nervilia purpurata auct.
Nervilia purpurata auct. is a terrestrial orchid that grows naturally in tropical and subtropical regions. This plant prefers a specific set of growth conditions for optimal growth and flowering.
Light Requirements
The plant requires bright, indirect light to thrive, and excessive or direct sunlight may be detrimental to its growth. The recommended light intensity for Nervilia purpurata auct. is around 1500-2000 fc.
Temperature Requirements
The plant thrives in warm temperatures with an ideal range of 20-30 °C during the day and 15-20 °C at night. At higher temperatures, the plant requires more frequent watering and humidity, while at lower temperatures, the plant goes into dormancy.
Soil Requirements
Nervilia purpurata auct. requires a well-draining soil mix that is rich in humus and organic matter. The plant prefers slightly acidic to neutral soil with a pH range of 6.0-7.5. It can tolerate a wide range of soil types, including sandy, loamy or clay soils, provided that the soil is well-draining.
The recommended potting mix for Nervilia purpurata auct. consists of peat moss, perlite, or vermiculite, and bark or coconut coir in equal parts. The plant should be repotted annually to replenish the nutrients in the soil mix.
Humidity
The plant requires high humidity levels of around 70% to 80% for optimal growth and flowering. One can mist the plant regularly or use a humidifier to keep the humidity level consistent.
By providing the ideal light, temperature, soil, and humidity requirements, Nervilia purpurata auct. can be a beautiful addition to any garden or indoor houseplant collection.
Cultivation
Nervilia purpurata auct. is a tropical orchid plant that requires a warm and humid environment to thrive. It grows best in partial shade and well-draining soil with good air circulation. The plant can be grown outdoors or in a greenhouse in areas susceptible to cold weather.
Watering Needs
The watering needs of Nervilia purpurata auct. can vary depending on the climate and the type of growing medium being used. However, as a general rule, the plant prefers to be kept moderately moist during the growing season and then drier during the dormant season. It is important not to overwater the plant, as this can lead to root rot and other diseases.
Fertilization
Nervilia purpurata auct. benefits from regular fertilization during the growing season. A balanced fertilizer with equal amounts of nitrogen, phosphorus, and potassium can be applied every two weeks to promote healthy growth and flowering. During the dormant season, it is recommended to reduce the amount of fertilizer or stop feeding altogether.
Pruning
Pruning of Nervilia purpurata auct. is generally unnecessary unless there are dead or damaged leaves. Diseased or infected parts of the plant should be removed immediately to prevent the spread of disease. Pruning can be done using a clean pair of pruning shears and taking care not to damage the healthy parts of the plant.
Propagation of Nervilia purpurata
Nervilia purpurata, also known as the purple Nervilia, is a terrestrial orchid species found in Southeast Asia. It can be found growing in shady areas of forests, on hillsides, and in grassy fields. Propagating the plant can be done through different methods.
Division
The most common propagation method for Nervilia purpurata is through division. This should only be done when the plant has become quite large and has multiple pseudobulbs. Dividing the plant involves gently removing the entire plant from its pot and separating the individual pseudobulbs with roots. It's important to keep the roots intact while dividing the plant. Each division should be potted up into a new pot, and then kept in a shaded and warm area until new growth emerges.
Seeds
Nervilia purpurata can also be propagated by seeds, though this method requires more patience and care. The seeds must be collected when the seedpod has dried, and the seeds inside have turned brownish-black. The seeds are then planted in a well-draining growing medium, such as a mix of peat moss, perlite, and coconut coir. The seeds must be kept moist, but not over-watered. After several weeks, the seedlings will emerge, and they should be transplanted into individual pots after they have several leaves and are large enough to handle.
Conclusion
Propagation of Nervilia purpurata can be done through division or seeds. Each method requires different levels of patience and care, but both can be successful if done correctly. With the right care, these methods allow for the creation of new plants, and also help to maintain cultivated populations of this beautiful terrestrial orchid species.
Disease and pest management for Nervilia purpurata auct.
Nervilia purpurata auct., commonly known as the Purple Nervilia or Marble Leaf Orchid, is a beautiful orchid species native to Southeast Asia. Proper care is necessary to keep them healthy and blooming, and this includes disease and pest management. Here are some common diseases and pests that might affect the plant and suggestions for managing them:
Diseases
1. Fungal diseases: The most common fungal diseases that affect Nervilia purpurata auct. are leaf spots and root rot. Leaf spots are caused by different fungal pathogens such as Cercospora, Colletotrichum, and Fusarium. They produce brown or black spots on the leaves, which can spread and cause premature leaf drop. Root rot is caused by overwatering or poor drainage, leading to the decay of the roots. Infected plants may wilt and die. To manage fungal diseases, practice good sanitation, and make sure to avoid overhead watering. Remove infected leaves and provide good air circulation. Use fungicides such as copper-based products to control the spread of the disease.
2. Bacterial diseases: Bacterial infections are less common on Nervilia purpurata auct., but they can cause severe damage. Bacteria such as Erwinia, Pseudomonas, and Xanthomonas can cause leaf spots and blotches, wilting, and stunted growth. Remove infected pieces using sterile tools and avoid overhead watering. Disinfect cutting tools before and after use. Use a bactericide product to prevent the spread of the diseases.
Pests
1. Thrips: These tiny insects are common pests of orchids. They feed on the plant sap, causing the leaves to become curly and discolored. Severe infestations can cause premature flower drop. To control thrips, use sticky traps or insecticidal soaps. Prune and dispose of infected leaves. You can also use beneficial insects such as lacewings and ladybugs to control thrips.
2. Spider mites: These pests are common in dry or hot conditions and can cause stippling of the leaves. When infestation is severe, the leaves may turn yellow or brown, and the plant may become stunted. Spray the affected plant with a forceful stream of water to knock off the mites. Increase the humidity around the plant to discourage the mites from multiplying. Use neem oil or insecticidal soap to control the infestation.
3. Mealybugs: These pests are common in orchids and feed on the plant sap. They create a white, fluffy coating on the leaves and stems. Severe infestations can cause stunted growth and plant death. Use isopropyl alcohol to dab on the affected parts or use cotton swabs soaked in alcohol to remove mealybugs.
In conclusion, Nervilia purpurata auct. is a beautiful orchid species that requires proper care, which includes disease and pest management. Practice good sanitation, avoid overhead watering, increase humidity around the plant, and use insecticides and fungicides to prevent the spread of disease and pests.
