[PATHOGENIC MIKO,- AND MICROFLORA OF FRAXINUS EXCELSIOR IN PODOLYA UKRAINE]

Area of Science:

• Forest pathology
• Entomology
• Plant microbiology

Background:

• European Ash (Fraxinus excelsior) is a vital tree species facing threats from various biotic agents.
• Understanding the complex interactions between pathogens, microflora, and entomofauna is crucial for effective forest management.

Purpose of the Study:

• To identify and summarize the key pathogenic microorganisms and harmful insects affecting European Ash.
• To assess the impact of these agents on the growth, development, and wood quality of European Ash.

Main Methods:

• Field observations and sample collection from European Ash trees.
• Microbiological analysis to identify fungal and bacterial pathogens.
• Entomological surveys to identify harmful insect species.

Main Results:

• Tuberculosis, caused by Pseudomonas syringae pv. savastanoi, identified as the most prevalent and damaging disease, affecting trunks, branches, twigs, and buds.
• Several other pathogenic fungi (mikofitozov) and insect pests (entomofauna) were identified as significant contributors to tree weakening.
• These agents collectively impair tree growth, development, and reduce the qualitative characteristics of European Ash wood.

Conclusions:

• Pseudomonas syringae pv. savastanoi poses a major threat to European Ash health.
• A diverse range of microbial and insect pests significantly compromises the vitality and wood quality of this species.
• Integrated management strategies are needed to mitigate the impact of these detrimental agents on European Ash populations.