Abstract
In this study, we aimed to study ascospore dispersal of Venturia inaequalis and subsequent disease development in an organic apple orchard (Eperjeske) in 2012 and 2013 on apple cultiva ’Mutsu). Burkard spore trap in March and April were used to monitior ascospore concentration and number of scab symptoms were assesed 20 May in both years. Three peaks were detected in ascospore dispersal in the period of examination which was clearly related to the Mills infection periods. On the basis of the incubation period’s length in April (15–18 days), the appearance of first symptoms had direct connection with the peak of the ascospore discharge. The largest number of symptoms were observed on those parts of the orchards where where the inoculum sources were accumulated.
Highlights
The pseudothecia of the fungus, Venturia inaequalis (Cooke) G
We aimed to study ascospore dispersal of V. inaequalis and subsequent disease development in an organic apple orchard
The results of the Burkard spore traps located at different distances were diverse from years
Summary
The pseudothecia of the fungus, Venturia inaequalis (Cooke) G. The ascospores getting into the air in that way travel a long distance in the air before successfully reaching the young parts of a plant. 20 years later Kaplan (1986) recorded the number of ascospores by Burkard spore traps locatec at differen distances from the source of infection. In his orchard with culivar McIntosh he could gather only a minimal amount of ascospores at 21 m distance and the increase in the number of symptoms compared to the other parts of the orchard was insignificant. We aimed to study ascospore dispersal of V. inaequalis and subsequent disease development in an organic apple orchard
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