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Biological Control of Fireblight (Erwinia amylovora [Burr.] Winslow et al.) on Ornamentals
Author(s) -
Isenbeck M.,
Schulz F. A.
Publication year - 1986
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1986.tb00925.x
Subject(s) - erwinia , biology , ornamental plant , inoculation , shoot , biological pest control , horticulture , botany , microbiology and biotechnology , disease control , bacteria , genetics
Several yellow pigmented, rod‐shaped bacterial strains with antagonistic activity against E. amylovora had been isolated from blighted ornamental shrubs. Criteria of the mode of action have been investigated under in‐vitro conditions and in inoculation experiments. In contrast to the noninhibitory isolates of the same host origin the active forms obviously produce a substantial principle. This is active only under acid conditions, it is heat‐stabile, it can be dialyzed and is solublein water and methanol. It is not a phenolic compound. In disease control experiments using culture filtrates of the antagonistic bacterial isolates fireblight could be reduced to a limited extend following shoot tip inoculation of Cotoneaster bullatus under controlled conditions. Compared to application of the living antagonists in the control experiments disease reduction, however, was considerably less expressed.