Origin
Parmelia pseudoborreri Asah. is a species of lichen in the family Parmeliaceae. It is found in Asia and was first described by M. Asahina in 1937.
Common Names
Commonly known as the false Borrer's parmelioid lichen, P. pseudoborreri Asah. is also referred to as Asahina's shield lichen.
Uses
Parmelia pseudoborreri Asah. is not known to have any significant medicinal or commercial uses. However, it is often collected for ornamental purposes due to its uniquely shaped thallus.
General Appearance
Parmelia pseudoborreri Asah. forms a foliose thallus that is flat and lobed, typically measuring up to 20 centimeters in diameter. The upper surface of the thallus is greenish-grey and smooth, while the underside can be black or brown with root-like rhizines. Apothecia, or fruiting bodies, are rare in this species and are typically a brown or black color.
Light Requirements
Parmelia pseudoborreri Asah. is a type of lichen that requires moderate to high light intensity for optimal growth. It can tolerate partial shade, but too much shade can hinder its growth and development.
Temperature Requirements
The plant can grow in a wide range of temperatures. However, it prefers a temperate climate, with temperatures ranging between 10°C and 20°C. Extremely high or low temperatures can cause stress to the plant and affect its growth.
Soil Requirements
Parmelia pseudoborreri Asah. does not have typical soil requirements as it is not a traditional plant. Instead, it grows on rocks, bark, and other solid surfaces. It can also grow on soil, but it prefers a substrate that is well-draining, moist, and nutrient-rich.
Cultivation
Parmelia pseudoborreri Asah. is a type of lichen that attaches itself to the surface of rocks, trees, and soil. It can be propagated by dividing the thallus and transplanting it to a new location or simply allowing it to establish naturally. It can be grown in terrariums at home or outdoors in a natural environment.
Watering Needs
Lichens, in general, are quite tolerant of drought and can survive long periods without water. However, for optimal growth, it is recommended to provide sufficient moisture. The best watering method is to mist the surface of the thallus with water, ensuring that it is evenly moist but not soaked. Avoid using tap water if possible, as the chlorine and other chemicals can harm the lichen. Rainwater, snowmelt, or distilled water are suitable alternatives.
Fertilization
Parmelia pseudoborreri Asah. gets its nutrients primarily from the air as opposed to the soil. Therefore, it does not require frequent fertilization. If grown indoors, you can use a foliar spray containing a balanced blend of micronutrients. Avoid using chemical fertilizers as they can harm the lichen.
Pruning
Since Parmelia pseudoborreri Asah. is a nonvascular plant, it does not require any pruning. However, you can remove any dead or damaged parts gently. When removing from the growing site, make sure to detach it gently and place it in a suitable location where it can re-establish itself. Avoid removing all of it as it plays a critical role in the environment.
Propagation of Parmelia pseudoborreri Asah.
Propagation of Parmelia pseudoborreri Asah. can be done by vegetative means. The following are its propagation methods:
Vegatative Propagation
Vegatative propagation of Parmelia pseudoborreri Asah. is done by fragmentation. You can just take a part of the plant, cut it, and plant it in soil or substrate. This can be done by detaching a part of the thallus and using it for propagation. The detached portion can either be anchored to a substrate or allowed to develop on its own. A small portion of the thallus retrieved from a stock plant may be cultured in nutrient-free agar to encourage mycelial growth. This method works well for introducing the lichen into new territories or growing it in laboratories.
Another method of vegetative propagation is by using isidia, which are small projections on the thallus that detach and grow into new individuals. Fragments with isidia should be carefully separated and seeded on a suitable substrate.
Parmelia pseudoborreri Asah. can also be propagated by soredia, which are small dust-like particles produced in the soralia. They can be separated from the thallus and grown into new individuals.
Overall, Parmelia pseudoborreri Asah. is an easy plant to propagate, especially under controlled conditions such as in a lab or greenhouse.
Disease and Pest Management for Parmelia pseudoborreri Asah.
Parmelia pseudoborreri Asah. is a lichen species commonly found growing on rocks and trees. While not typically affected by diseases and pests, it is still important to monitor the plant for any signs of damage or unusual growth.
Common Diseases
One common disease that may affect Parmelia pseudoborreri Asah. is lichen infection caused by parasitic fungi. The infection appears as black spots on the plant, and if not managed, can spread and eventually kill the plant. Managing this disease involves removing the infected parts of the lichen with a sharp knife or brush. The plant should be sterilized after each cut, and any spores or debris should be carefully disposed of to prevent further spread of the disease.
Common Pests
While not often affected by pests, Parmelia pseudoborreri Asah. may attract herbivorous insects such as aphids, mealybugs, and scale insects. These pests can cause yellowing and stunted growth of the plant. To manage these pests, it is important to regularly inspect the plant for any signs of infestation and to remove any affected leaves or branches. Introducing beneficial insects such as ladybugs or lacewings can also be an effective form of natural pest control.
Chemical pesticides should only be used as a last resort, as they can harm beneficial insects and also alter the delicate ecosystem of the plant's environment. If using a pesticide, it is important to follow the instructions carefully and to avoid any contamination of the surrounding area.
Conclusion
With proper management, Parmelia pseudoborreri Asah. can remain healthy and free from diseases and pests. Regular monitoring and proper care are essential to maintaining the health and vitality of this beautiful lichen species.
