ISHS Acta Horticulturae 117: II Symposium on Fireblight
EXPERIENCE WITH CHEMICALS AGAINST ERWINIA AMYLOVORA |
| Authors: | T. Kooistra, J.J.J. Langeslag |
| Abstract:
The efficacy against artificial inoculation with E. amylovora of 3 different copper compounds, 3 experimental bactericides, 7 fungicides of pome fruit culture, 4 disinfectants and 2 quinolate compounds were tested on Cotoneaster spp., pear and quince. In the preventive trials on flowering plants the 3 copper products were equally active. Two new bactericides reached the level of streptomycin, the other was somewhat inferior. The bactericidal side-effect of the fungicides was negligible. The disinfectants and quinoline compounds were ineffective. The curative action against flower infection of the 2 bactericides tested, varied with the test plant. The four bactericides used showed preventive action against shoot inoculation, but no curative control. There was a small noteworthy influence of the inoculum density of the inoculated bacterium on the control level. The opportunity of allowing new products for fireblight control was discussed. | |
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