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Issue 4 (2) 2005 pp. 21–26

Katarzyna Rogaś, Marek Grabowski

The effect of autumn infection of apple leaves on the occurrence of the conidial stage of fungus Venturia inaequalis (Cooke) Aderh. On One-Year-Old Shoots

Abstract: The aim of the paper was to determine the effect of autumn infestation of leaves for apple cultivars (McIntosh, Idared, Jonagold) on the occurrence of conidia of Venturia inaequalis on twigs. It was found that high infestation of apple leaves in autumn is advantageous to conidia overwintering on twigs. Loosely spread hyphae and conidial spores were more frequently observed on twigs in an orchard where no chemical control was employed. The largest amount of conidial spores was recorded on twigs of unprotected McIntosh apple trees as a result of high infestation of leaves in later autumn. A considerably lower amount of conidia was recorded on twigs of Jonagold apple trees. In orchards under chemical control the conidia wintering occurs less frequently and only if leaves were highly infested in the autumn.
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Keywords: apple scab, coniadial spores, overwintering

For citation:

MLA Rogaś, Katarzyna, and Marek Grabowski. "The effect of autumn infection of apple leaves on the occurrence of the conidial stage of fungus Venturia inaequalis (Cooke) Aderh. On One-Year-Old Shoots." Acta Sci.Pol. Hortorum Cultus 4.2 (2005): 4.
APA Rogaś, K., & Grabowski, M. (2005). The effect of autumn infection of apple leaves on the occurrence of the conidial stage of fungus Venturia inaequalis (Cooke) Aderh. On One-Year-Old Shoots. Acta Sci.Pol. Hortorum Cultus 4 (2), 4.
ISO 690 ROGAś, Katarzyna, GRABOWSKI, Marek. The effect of autumn infection of apple leaves on the occurrence of the conidial stage of fungus Venturia inaequalis (Cooke) Aderh. On One-Year-Old Shoots. Acta Sci.Pol. Hortorum Cultus, 2005, 4.2: 4.
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