Overview
Tarenna Lasiorachis (K.Schum. & K.Krause) Bremek. is a plant species that belongs to the Rubiaceae family. It is a shrub found mainly in Nigeria, Cameroon, Congo, and the Central African Republic.
Common Names
Tarenna Lasiorachis is commonly known as "Mpee Masombe" in Cameroon, "Utu" in Nigeria, and "Kiwambani" in the Democratic Republic of Congo.
Appearance and Characteristics
The plant is a medium-sized shrub, growing up to 3m high and 4cm in diameter, with dense branches. The leaves are elliptic, 4-21 cm long, and 2-13 cm wide, with a smooth surface and hairless on both sides. The flowers are small, white, and fragrant, arranged in clusters at the end of the branches. The fruits are green, turning black when ripe, with a diameter of approximately 1cm.
Uses
The plant has several medicinal properties. In Cameroon, it is used to treat dysentery, fever, and liver problems. In Nigeria, it is used to treat stomachache, fever, and malaria. The bark extracts of the plant have shown antitumor and anti-inflammatory activities. Besides its medicinal benefits, the plant is also used for ornamental purposes due to its beautiful and pleasant-looking flowers.
Light Requirements
Tarenna lasiorachis is found in its natural habitat under the canopy layer of the forest and therefore prefers low to moderate levels of light to grow. This species can tolerate higher levels of light but it may slow down its growth.
Temperature Requirements
Tarenna lasiorachis grows predominantly in the warmest months of the year from October to March. The ideal temperature range for the growth of T. lasiorachis is between 18 ?C and 28 ?C. This species has been known to survive in temperatures as low as 13 ?C but this may alter its growth rate.
Soil Requirements
Tarenna lasiorachis is a sapling species that grows in well-drained soils. This species can grow in various types of soils including sandy, clayey and loamy soils but the growth rate is dependent on the nutrient content of the soil. Areas where the plant is grown require to have proper drainage to avoid waterlogging that may lead to diseases.
Cultivation Methods
Tarenna lasiorachis requires well-draining soil with a pH level between 6.0 to 7.0 and partial shade to thrive well. It is best to grow the plant in a pot as it will create a suitable environment for the plant's growth. You can propagate the plant using cuttings or layering.
Watering Needs
The plant requires regular watering to keep the soil moist but not waterlogged. It is necessary to water the plant deeply and allow the soil to dry slightly before the next watering. This helps to prevent root rot and other diseases that may affect the plant's growth.
Fertilization
You can fertilize Tarenna lasiorachis with a balanced fertilizer during the growing season. Apply the fertilizer once a month to encourage healthy growth, but be careful not to over-fertilize the plant as this may lead to burning of the roots or leaves.
Pruning
You can prune the plant to promote bushier growth and remove any dead or damaged parts. Regular pruning also helps to control the plant's size, making it an ideal choice for indoor or terrace plants. It is best to prune the plant during the growing season, preferably in the spring or summer months.
Propagation of Tarenna lasiorachis
Tarenna lasiorachis can be propagated through seeds, stem cuttings, and layering. Each method has its unique advantages and disadvantages, and the choice of propagation method depends on the grower's preference and experience.
Propagation through Seeds
The seeds of Tarenna lasiorachis can be sown in a well-drained potting mix, and covered with a thin layer of soil. The pot should be kept moist, but not waterlogged, and placed in a warm and bright location. The seeds usually germinate within one to two months, depending on the temperature and humidity. Once the seedlings have grown several true leaves, they can be transplanted into larger pots or directly into the ground.
Propagation through Stem Cuttings
Stem cuttings are another way to propagate Tarenna lasiorachis. The cuttings should be taken from the tips of the branches, and be at least 10cm long, with a few leaves attached. The lower leaves should be removed, and the cutting dipped in rooting hormone powder. The cutting is then inserted into a well-draining potting mix, and watered thoroughly. The pot should be covered with a plastic bag or placed in a propagator to maintain high humidity and prevent moisture loss. After a few weeks, new growth should appear, indicating that rooting has taken place. The rooted cuttings can be transplanted into larger pots or directly into the ground.
Propagation through Layering
Layering is a propagation method that involves burying a portion of the stem of the parent plant, while still attached to the parent plant. A small cut is made on the stem and is covered with rooting hormone powder. The cut portion of the stem is then buried in a well-draining potting mix and supported with a stake. After a few weeks, roots should appear from the buried stem, and once enough roots have formed, the newly rooted cutting can be separated from the parent plant and transplanted into larger pots or directly into the ground.
Disease Management
Some common diseases that might affect Tarenna lasiorachis include:
- Leaf spot: This disease is caused by fungal pathogens and can cause small, circular or angular spots on leaves. To manage leaf spot, remove the infected leaves and use fungicides as necessary.
- Anthracnose: This fungal disease can cause leaf yellowing, wilting, and dieback. To manage anthracnose, use fungicides and prune infected branches properly.
- Mildew: Mildew is a fungal disease that can cause a white powdery substance on the plant's leaves and stem. To manage mildew, remove infected plant parts and use fungicides as needed.
Pest Management
Some pests that might affect Tarenna lasiorachis include:
- Aphids: These tiny insects can cause leaf curling and deformation. To manage aphids, remove infested leaves and use insecticidal soap or horticultural oils.
- Mealybugs: Mealybugs can cause leaf discoloration and wilting. To manage mealybugs, use insecticidal soap or horticultural oils and remove infected plant parts.
- Spider Mites: Spider mites can cause yellowing leaves and webbing on the plant's leaves and stem. To manage spider mites, use insecticidal soap or horticultural oils and ensure the plant is well-hydrated.
Regular monitoring and practicing good hygiene can help prevent diseases and pests from affecting the plant. Further, it is recommended to follow the guidelines provided by the local extension service while using any chemical treatments.
