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The effect of various chemical compounds in the control of sooty blotch

Marek Grabowski, Beata Wrona

Department of Plant Protection
Faculty of Horticulture, Agricultural University in Kraków
29 Listopada 54, 31-425 Kraków, Poland
e-mail: mgrabowski@ogr.ar.krakow.pl

The date of primary infection by fungi causing sooty blotch varied depending on chemical protection programs. In unsprayed orchards the earliest infections occured in late June-early July. By using the three fungicide sprays between the green flower bud stage and June drop (program I) the date of primary infection was postponed to the mid of July. The sprays prolonged by two weeks (program II) eliminated infection or considerably reduced the incidence of the disease. Among the three apple cultivars under investigation the highest susceptibility to sooty blotch was noted for ‘Golden Delicious’.

Grabowski M., Wrona B., 2004. The effect of various chemical compounds in the control of sooty blotch. Folia Horticulturae 16/2: 159-164.