Ukrainian Journal of Forest and Wood Science

Our research related to the monitoring of leaf-eating pests of oak (Quercus robur L. and Quercus rubra L.) in the context of Insecta class species composition determination at different growth and development stages. During the entire study period such damage types in both species were identified: skeletization, mining, deformation, holes, browsing (hard and margin), leaf rolling, drying. Gall-like swellings were identified in Q. robur. It has been established that the average damage amount of assimilation apparatus is more than 50 % of the leaves; the examined plantations were referred to the 2nd defoliation ratio – medium-damaged. Marginal eating-out is the most common damage that occurred on the examined leaves; in particular it was noted on 19.5 % of Q. robur leaves and 16.2 % of Q. rubra leaves. Also often there were holes and drying up of leaves. Significantly less marked are such types of damage as skeletization, mining, leaf rolling and gall formation. In general, based on the studies and results obtained, it can be argued that leaf-eating insects play an important role as an intensifying factor in the process of weakening and degradation of oak forests.

комахи-листогризи, Quercus robur L., Quercus rubra L., типи пошкоджень, дефоліація, скелетування, скручування, міни, гали