Утицај гала Andricus kollari (Hartig, 1843) (Hymenoptera, Cynipidae) на раст подмлатка храста китњака (Quercus petraea (Matt.) Liebl.) / Effects of Andricus kollari (Hartig, 1843) (Hymenoptera, Cynipidae) galls on the growth of sessile oak (Quercus petrae
2018
Добросављевић, Јован | Кањевац, Бранко | Марковић, Чедомир
Natural regeneration of sessile oak forests had always been demanding, but it became nearly impossible when in the 1980’s dieback started to affect entire oak forests. Old trees have been dying from the top, and young plants have been threatened by a large number of pests, pathogens, and abiotic factors. As the height growth is most important in this life stage of a tree, any kind of disturbance has very negative effects on the development or even the survival of a plant. Therefore, research was conducted on the effects of a bud pest - Andricus kollarii (Hartig, 1843) on the height growth of young sessile oak plants. The research was carried out on two regeneration fields in northeastern Serbia (in the vicinity of Majdanpek). Besides the effect of this species on the growth, the intensity of its attack was also determined in order to build up a real picture of its harmfulness. Although the intensity of the attack was relatively low, it was determined that the presence of galls had a significant influence on the height growth. In a large number of plants, apical shoots stopped growing after the galls had been formed.
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