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
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.