Gal Formations Observed in Manisa Oak Species
Gal formation is caused not only by insects but also by mites and bacteria. Gal formations, which we see most in fruit trees, are also quite high in forest areas. In this study, gal formation occurring on the oak species in Manisa province and affecting factors were investigated. Observations and investigations were conducted between March 2018 and September 2019. To date, 7 different oak species have been identified in Manisa. These are Quercus cerris, Quercus infectoria, Quercus ithaburensis, Quercus pubescens, Quercus coccifera, Quercus ilex, Quercus trojana. The highest gal formation was observed in Quercus cerris and Quercus infectoria species.