Pseudomonas syringae sastopamība kauleņkoku dārzos Latvijā
2017
Konavko, D., Latvia Univ. of Agriculture, Ceriņi, Krimūna Parish, Dobele Municipality (Latvia). Inst. of Horticulture | Jundzis, M., Latvia Univ. of Agriculture, Ceriņi, Krimūna Parish, Dobele Municipality (Latvia). Inst. of Horticulture | Morocko-Bicevska, I., Latvia Univ. of Agriculture, Ceriņi, Krimūna Parish, Dobele Municipality (Latvia). Inst. of Horticulture
Bacterial diseases are economically important and widespread on stone fruits worldwide. The bacterial diseases of stone fruits have not been studied in Latvia, and the identification of causal agents has not been carried out previously. Thirty-seven farms were surveyed in 2008-2011 to detect and evaluate the occurrence of pathogenic Pseudomonas syringae on stone fruits in Latvia. During the surveys, the overall health condition of orchards was evaluated visually, and samples were collected from diseased trees. Bleeding cankers on trunks and branches, different stage of diebacks on branches, wilt of buds and flowers were the most often observed symptoms. Isolates with morphology characteristic to Pseudomonas were selected for species identification by LOPAT test. Pathogenic P. syringae were detected in samples from ten farms out of 37 surveyed. In six farms, pathogenic P. syringae isolates were determined on sweet cherries (Prunus avium), in two farms on sour cherries (Prunus cerasus) and in three farms on plums (Prunus domestica). Bacterial diseases of stone fruits caused by P. syringae are more spread in the central region of Latvia, where the stone fruits are widely grown. The low occurrence of pathogenic P. syringae reveals that severe symptoms observed on the stone fruits in orchards are also caused by other plant pathogens.
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