Identification Of Biotic Factors Present on Woody Ornamental Plants

Abstract

The demand for arborescent and shrubby ornamental plants has increased a lot in recent years, therefore, both forestry and private nurseries have recorded increases in the production of these plants. Due to the increase in production, much of the planting material was imported, and with it, various diseases and pests were propagated. Field trips were made both to nurseries and to alignments of ornamental plants, observations were made in the field and samples were taken for laboratory analysis. In order to identify pathogenic agents, the analyzes carried out consisted of taking samples from the infested material on PGA (potato-glucose-agar) culture medium. Within nurseries, the biotic agents identified are from both the disease and pest spectrums. Thus, the pathogen Kabatina thujae and the pest Ovalisia festiva were identified in the thuja crops, and the pathogen Phoma dura was identified in the fir crop. Within the alignments studied, the pests Cydalima perspectalis were identified in buxus, and in the case of thuja alignments, the pathogens Seimatosporium berckmansii and Kabatina thujae were identified. The identified biotic agents cause significant damage, especially in plantations on green spaces, and combating them is quite difficult due to the regulations in force, especially those of civil protection