Hello, lichens can be seen on the branches and trunk (Trunk and branches fungi - prevention and control). They usually grow on old, decaying or stressed trees. It is important to mention that, although their presence is often associated with the causes of tree diseases, studies have shown that they do not directly affect the trees, but can be hosts for pathogenic fungi and insects. Also, cracks can be observed on the trunk, which most often occur due to excessive soil moisture and temperature variations. In this case, it is recommended to clean the affected areas and the lichens (with a clean, disinfected tool) until healthy wood is observed. Then apply a copper-containing solution such as , to the wounds. One sachet of is dissolved in a small amount of water to form a paste. After the solution has dried, you can consider applying a product that promotes wound healing and prevents the penetration of moisture that can lead to the onset of specific diseases ( or ).
In the future, a special solution such as , can be used to protect the bark and prevent the appearance and development of lichens.
Additionally, in order to maintain a good phytosanitary condition of the tree, it is advisable to consider both treatments that are carried out during the dormancy period, if the plant has not begun its vegetative growth (Winter treatments with oils and copper-based products), and those that are carried out during the growing season. Also, to ensure an optimal nutrient supply to the pear tree, you can consider using specific fertilizers, both for root fertilization: , , or , and foliar fertilization: , or .
These fertilizers can be applied regularly throughout the growing season, depending on the phenotype and condition of the trees, in accordance with the instructions on the label and in compliance with environmental and labor protection regulations/recommendations. It is important that the periods of action of the fertilizers with the same method of administration (foliar or root) do not overlap. The main role of root fertilizers is to improve soil fertility, texture and structure, thus stimulating the optimal uptake of nutrients from the soil and thus the growth of plants. Foliar fertilizers prevent deficiencies, improve the photosynthesis process and contribute to chlorophyll biosynthesis, while enhancing the resistance of plants to physiological stress as well as to diseases and pests.