In the present paper are presented results regarding the natural distribution of pathogen fungus Septoria pyrina which produce the leaf white spots on pear trees. This disease was monitored between 2021 and 2023 on the area situated in the South West part of Romania, between river Caraș and Danube. This pear trees disease has for the moment a constant presence on the area. pathogen attack is really easy to be observed because the small white to gray spots with no more than 5 mm diameter produced by the fungus when this is at maturity. But as final result of Septoria pyrina attack is the premature lose of the leaves which mean the tree has difficulties on preparations for the winter and this is the main reason why are so important this kind of surveillance on the funguses epidemiologic potential. In the same time, if there are high levels of spots on the leaves it mean that there are a lot of spores produced by fungus and the infection pressure is high. In the same time, an increased number of spots means a high number of fungus reserve for the next year infections. For this reason it is very important to keep the fungus inoculum level under surveillance and use those data for important decisions as there is the moment when it is absolutely necessary to apply one treatment against the fungus. Results indicate without any doubt that the funs is present all around the localities from the evaluated area. Never the less it is mandatory for permanent surveillance of this fungus inoculum evolution on the areas where there are pear orchards.

Septoria pyrina pear tree leaf disease

agronomy

Presentation: poster