The Plant Garcinia robsoniana Bamps
Garcinia robsoniana Bamps is a rare and endangered plant species that belongs to the Clusiaceae family. This species is endemic to Sabah, which is located in the northern part of the island of Borneo.
Common Names
This plant species is commonly known as Robson's Mangosteen or Bukit Manggis in the Malay language.
Uses
The Garcinia robsoniana Bamps plant has some medicinal properties and is traditionally used for various ailments, such as diarrhea, dysentery, fever, and malaria. The locals also use its bark and leaves as poultices for skin diseases.
Moreover, the fruits of this plant are edible and can be eaten raw or cooked. They are often used in traditional medicine and as a food source.
General Appearance
The Garcinia robsoniana Bamps plant is a shrub or small tree that can grow up to 8 meters tall. Its bark is brown and smooth, and the leaves are dark green and glossy. The flowers are greenish-yellow and are about 2 centimeters in diameter.
The fruit of this plant is a fleshy, round, and reddish-colored berry that is about 4 centimeters in diameter. The fruit has a sweet and sour taste and contains seeds that are coated with a red aril.
Overall, the Garcinia robsoniana Bamps plant is a valuable plant species that has many traditional uses and is an important part of the local biodiversity in Sabah. However, because of habitat loss and exploitation, this plant is now considered endangered, and conservation efforts are needed to save it from extinction.
Growth Conditions of Garcinia robsoniana Bamps
Garcinia robsoniana Bamps, commonly known as the Robson's mangosteen, is a tropical tree species that is found in New Guinea. This plant has specific growth conditions that are critical to its survival and productivity. Below are some of its growth requirements:
Light Requirements
Like most plants, Garcinia robsoniana Bamps requires sunlight to thrive. This tree species does well in areas with partial shade or full sunlight. When planted in areas with dense shade, the growth rate of the plant is slow, and the tree tends to elongate with fewer branches. Hence, it is essential to plant Garcinia robsoniana Bamps in areas where there is access to sufficient sunlight.
Temperature Requirements
Garcinia robsoniana Bamps thrives in warm temperatures between 22°C and 30°C. Temperatures below 18°C can cause damage to the tree, and if the temperatures drop below 15°C, it can result in leaf drop. In contrast, high temperatures of over 32°C can also damage the plant. Therefore, it is crucial to plant Garcinia robsoniana Bamps in areas with a suitable temperature range.
Soil Requirements
The Robson's mangosteen requires well-drained soils that are sandy or loamy. The soil pH should be between 5.5 and 6.5. The plant can also tolerate slightly acidic soils with a pH of up to 7.5. Soil that is too compacted and poorly drained can lead to root rot and fungal infections. It is, therefore, vital to ensure adequate soil preparation before planting the tree species.
By providing Garcinia robsoniana Bamps with the right growth conditions, the tree can grow and produce fruit successfully. It's important to note that these growth conditions may vary depending on the location and geographic region where the plant is grown.
Cultivation Methods for Garcinia robsoniana Bamps
Garcinia robsoniana Bamps thrives well in subtropical and tropical climates. It is suitable for cultivation in well-drained soils with a pH range of 5.5-6.5. For optimal growth, the plant requires partial shade and a well-aerated growing environment. To cultivate this plant, begin by selecting a well-drained soil and preparing it by incorporating organic matter to enhance fertility.
Transplant seedlings to the field once they reach 4-6 leaf stage, and the last frost has passed. Plant seedlings at a spacing of between 5-10m and ensure to mulch around them to improve weed control and conserve moisture.
Watering Needs for Garcinia robsoniana Bamps
Garcinia robsoniana Bamps requires regular watering to sustain optimal growth. Young plants may require daily watering until they establish themselves. For mature plants, watering should be done once or twice a week, depending on the prevailing weather conditions. Ensure soil moisture remains evenly distributed, and avoid waterlogging the soil to minimize root rot.
Fertilization Needs for Garcinia robsoniana Bamps
Fertilization is essential to promote healthy growth and fruiting of Garcinia robsoniana Bamps. Regular application of balanced fertilizers in the ratio of 3:1:2 NPK during the growing season is recommended. For organic fertilizer options, incorporate well-rotted animal manure, bone meal, and compost to boost soil productivity. Apply fertilizer at a rate of 100-150 g per plant annually, distributed evenly around the root area.
Pruning of Garcinia robsoniana Bamps
Pruning is necessary to maintain the shape and size of the plant, reduce canopy density to increase light penetration and enhance air circulation, and remove diseased or dead branches. Carry out pruning activities during the dry season to avoid wound infection. Also, a hard prune every 3-4 years is necessary to stimulate new growth and promote vigorous branching. Avoid pruning excessively as it may reduce the plant's productivity and damage its natural canopy.
Propagation of Garcinia robsoniana Bamps
Garcinia robsoniana Bamps, also known as Robson's Mangosteen, is a tree species that is endemic to Papua New Guinea. Propagation of this plant can be done through the following methods:
Seed propagation
Seeds are commonly used to propagate Garcinia robsoniana Bamps. They can be obtained from fresh fruits and should be sown immediately after extraction. Seeds are cleaned and then soaked in water overnight to soften the outer shell, which facilitates germination.
The seeds are then sown in a mixture of fine sand and organic matter such as peat moss or compost. The seeds should be covered with a thin layer of the sowing medium and then watered gently. Germination should occur within 3-4 weeks.
Cuttings propagation
Cuttings can also be used to propagate Garcinia robsoniana Bamps. Semi-hardwood cuttings, around 8-10 cm in length, can be collected from the mother plant during the growing season. Leaves on the lower half should be removed and the cuttings should be treated with rooting hormone before planting.
The cuttings are then planted in a mixture of sand and peat moss and placed in a shaded area with high humidity. It is important for the cuttings to stay moist to avoid desiccation. After the roots have formed, the cuttings can be transplanted to individual pots or directly into the ground.
Air layering propagation
Air layering can also be used to propagate Garcinia robsoniana Bamps. A 5-8 cm section of a branch is selected and the bark is removed from a 2-3 cm segment. A rooting hormone is then applied, and a ball of moist sphagnum moss is wrapped around the exposed wood. The moss is then covered with plastic wrap to maintain moisture and prevent it from drying out.
After roots form, the section of branch is cut below the ball of moss and transplanted to a pot or directly into the ground.
Disease and Pest Management for Garcinia robsoniana Bamps
Garcinia robsoniana Bamps is a tropical evergreen tree, commonly known as Robson's Garcinia. Like any other plant, it is susceptible to diseases and pests. Here are some common diseases and pests that might affect the plant and ways to manage them:
Diseases
Leaf spot is a fungal disease that causes circular, brown spots on the leaves. To prevent leaf spot, avoid overhead irrigation and improve air circulation by pruning the tree. In case of infection, remove the infected leaves and spray a fungicide on the plant.
Anthracnose is another fungal disease that causes brownish-black spots on the leaves and fruits. Remove the infected plant parts and increase the distance between the plants to promote better air circulation. Spray a fungicide on the plant to prevent further spread of the disease.
Phytophthora root rot is a soil-borne disease that causes the roots to rot. Avoid overwatering and improve soil drainage to prevent the disease. If the plant is infected, remove it from the ground and sterilize the soil. Do not plant anything in that area for at least a year.
Pests
Mealybugs are small, white insects that suck sap from the plant, causing stunted growth and yellowing of the leaves. Remove them manually or spray the plant with insecticide soap.
Aphids are small, soft-bodied insects that feed on the leaves and buds, causing curling and yellowing of the leaves. Remove them manually or spray the plant with a solution of water and dish soap.
Scale insects are small insects that feed on the sap of the plant, causing yellowing of the leaves and stunted growth. Remove them manually or spray the plant with insecticide soap.
Regular monitoring and good cultural practices like proper irrigation, fertilization, and pruning can prevent diseases and pest infestations in Garcinia robsoniana Bamps. If the problem persists, seek the help of a professional.
