Chemical control of fire blight in pear: application of prohexadione-calcium, acibenzolar-S-methyl, and copper preparations in vitro and under field conditions
2006
Geider, K. | Spinelli, F. | Ponti, L. | Andreotti, C. | Costa, G. | Spada, G. | Sabatini, E.
allemand. Systemic acquired resistance (SAR) inducers and dioxygenase-inhibitors represent an alternative approach for controlling fire blight. Acibenzolar-S-methyl (ABM), prohexadione-Ca (ProCa) and trinexapac-ethyl (TrixE) were tested in vitro and under field conditions for their efficacy in reducing fire blight incidence and severity. Under field conditions, these compounds significantly reduced (up to 40%) fire blight incidence. Similarly, in vitro, resistance inducers slowed down the pathogen migration in both the xylem and the parenchyma. In particular, the application of ProCa and TrixE resulted in a 50-60% reduction of pathogen migration inside the plant tissues.
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