The distribution of bacteria Gibbsiella quercinecans and Brenneria goodwinii in oak (Quercus robur L.) stands in Latvia

Abstract Acute Oak Decline (AOD) is a complex plant disease affecting species of native oaks, for example, Quercus robur , in Latvia. Typical AOD symptoms are bark cracks with dark exudate. In other European region countries, like the United Kingdom, associated insects, Agrilus biguttatus . From results forest survey, it can be concluded that oak stands located Latvia, there practically no damage by insect A. which may indicate existence another spreading vector. 2019, from one oak, was positive spring, repeated stem bleed samples were taken autumn period, laboratory analysis samplings negative. These findings suggest activity bacteria Brenneria goodwinii and Gibbsiella quercinecans influenced climatic conditions.