Plant Description
Aulacocalyx divergens, commonly known as the Pink Kaboo, is a small perennial shrub that belongs to the family of Lamiaceae. The plant is native to West Africa, especially in Guinea and Sierra Leone. It can grow up to two meters in height when fully matured.
The leaves of the Pink Kaboo are simple, opposite and the blade is elliptical with a pointed tip. The inflorescence is a terminal raceme with pinkish-purple flowers that bloom in August-September.
Common Names
Aulacocalyx divergens is commonly known as Pink Kaboo in Sierra Leone and Guinea. In other parts of West Africa, it is known as Lihiri.
Uses
The Pink Kaboo is widely used in traditional medicine for the treatment of various ailments including malaria, fever, and headache. In addition, the plant is also used as a spice and flavoring agent in West African dishes such as soups, stews, and sauces due to its aromatic properties.
Furthermore, the plant contains essential oil that possesses insecticidal activity against mosquito larvae, making it a potential alternative to conventional insecticides for mosquito control.
General Appearance
Aulacocalyx divergens is a small to medium-sized woody shrub characterized by elliptical leaves with a pointed tip and pinkish-purple flowers in a terminal raceme. The plant has a strong aromatic scent, and it is often heavily branched. The bark of the Pink Kaboo is grey-brown and slightly rough, while the stems are slender and green in color.
Light Conditions
Aulacocalyx divergens typically prefers bright, indirect light conditions. It can also tolerate low light conditions, but this may result in slower growth and smaller leaves. Direct sunlight should be avoided as it can damage the leaves.
Temperature
This plant grows best in warm temperatures ranging from 20°C to 30°C. It can tolerate temperatures as low as 15°C but not lower. Temperatures above 30°C can lead to leaf scorching and should be avoided.
Soil Requirements
Aulacocalyx divergens prefers a well-draining soil mix that is rich in organic matter. The soil pH should be slightly acidic, between 6.0 and 6.5. The plant should be planted in a pot with drainage holes to prevent waterlogging which can cause root rot. Adding perlite or sand to the soil mix can improve drainage.
Cultivation Methods for Aulacocalyx Divergens
Aulacocalyx divergens is a delicate plant, and it grows best in well-drained soil that is rich in organic matter. It thrives in areas where there is adequate sunlight that is not too harsh. You can grow this plant outdoors or indoors, depending on your preference and the climate. For outdoor cultivation, choose a spot with partial to full shade. For indoor cultivation, keep the plant near a bright window or under artificial light sources.
Watering Needs for Aulacocalyx Divergens
The Aulacocalyx divergens plant requires regular and consistent watering. However, you should avoid over-watering the plant as it may cause the roots to rot. Allow the soil to dry slightly between waterings, and ensure that the soil is not waterlogged. Water the plant at the base to avoid getting the foliage wet, which may encourage fungal growth.
Fertilization for Aulacocalyx Divergens
Like other houseplants, Aulacocalyx divergens requires regular fertilization to maintain its health and vitality. Apply a balanced, water-soluble fertilizer every four to six weeks during the growing season (spring and summer). Dilute the fertilizer to half its strength to avoid over-fertilizing the plant. You should reduce the frequency of fertilization during the plant's dormant period (fall and winter).
Pruning Aulacocalyx Divergens
Pruning helps to keep Aulacocalyx divergens in shape and control its size. You should prune the plant in early spring when new growth appears. Use a clean, sharp pair of scissors or pruning shears to remove any dead, damaged, or diseased foliage. You can also pinch back the tips of the stems to encourage bushier growth and fuller foliage. Avoid cutting back more than one-third of the plant's total foliage at once, as this may stress the plant.
Propagation of Aulacocalyx divergens (Hutch. & Dalziel) Keay
Aulacocalyx divergens (Hutch. & Dalziel) Keay is a beautiful subtropical plant that belongs to the Rubiaceae family and is native to West Africa. Propagation of this plant can be done through the following methods:
Seed Propagation
Propagation through seeds is the most common method of multiplying Aulacocalyx divergens. The seeds can be sown in seedboxes in a mixture of peat moss and sand, and placed in a warm, humid environment. Germination usually begins within two weeks, and the seedlings can be transplanted into individual pots after they have developed two true leaves.
Stem Cuttings Propagation
Propagation through stem cuttings is another effective method of multiplying Aulacocalyx divergens. In this method, the cuttings are taken in the early summer from non-flowering shoots of the plant. The cuttings should be 6-10 cm long and stripped of the lower leaves, leaving only two or three leaves at the top. Plant the stems in a mix of sand and peat moss and keep them under high humidity and bright light. Roots should develop in 3-4 weeks, and once they have reached an adequate size, the cuttings can be transferred to individual pots.
Air Layering Propagation
Air layering is a method of propagation that is best for older, well-established plants. In this method, a section of the stem is girdled and kept moist with the help of sphagnum moss. Once the roots have formed, the shoot can be detached from the parent plant and planted in a separate pot of soil.
All propagation methods mentioned above require good quality soil, proper watering, and moderate fertilization to ensure successful growth and development of the Aulacocalyx divergens plant.
Disease and Pest Management for Aulacocalyx divergens (Hutch. & Dalziel) Keay
Aulacocalyx divergens (Hutch. & Dalziel) Keay is a tropical shrub that belongs to the family Acanthaceae. Like all plants, it is susceptible to diseases and pests that may affect its growth and development. Below are some common diseases and pests that affect Aulacocalyx divergens (Hutch. & Dalziel) Keay and ways to manage them:
Common Diseases
1. Leaf Spot: Leaf spot is a fungal disease that causes small brown spots with yellowish halos on the leaves. To prevent its occurrence, it is essential to practice good sanitation by removing any fallen leaves and debris around the plant. Additionally, avoid overhead watering, as it can promote the spread of the disease. Treating with a fungicide may also help to control leaf spot.
2. Root Rot: Root rot is a disease caused by fungi that thrive in damp conditions. It causes the roots to rot, resulting in stunted growth and wilting of the plant. To prevent root rot, ensure that the plant is in well-draining soil, and avoid overwatering. A fungicide can also be used to control root rot.
Common Pests
1. Mealybugs: Mealybugs are tiny white insects that feed on the sap of the plant, causing stunted growth and yellowing of the leaves. To control mealybugs, it is essential to identify them early and isolate the affected plant. You can use an insecticidal soap or neem oil to control the infestation.
2. Spider Mites: Spider mites are tiny pests that feed on the undersides of leaves, causing yellowing and distortion of leaves. To manage spider mites, it is essential to increase the humidity around the plant and avoid over-fertilization. You can also use a miticide to control the infestation.
3. Scale Insects: Scale insects are small pests that attach themselves to the stem or leaves of the plant and feed on sap. To control them, it is essential to identify them early and remove them from the plant using a soft-bristled brush or cotton swab dipped in rubbing alcohol. You can also use an insecticidal soap to control the infestation.
Managing diseases and pests on Aulacocalyx divergens (Hutch. & Dalziel) Keay can be challenging, but early detection and proper treatment can prevent significant damage to the plant.
