PRELIMINARY STUDIES AND TRIALS TO CONTROL ANTHRACNOSE FRUIT ROTS ON EVERBEARING STRAWBERRIES
The susceptibility of different organs, with artificial contamination, in vitro and in field, has been specified.
An in vitro study of biological efficacy of 11 fungicides (Carbamates, Dicarboximides and Heterocycles EBI) on mycelial growth and spore germination, permitted the evaluation of the compounds :
- Captafol, Fenpropimorph, Fluzilazol, Prochloraz, Propiconazole as mycelium growth inhibitors,
- Captafol, Mancozeb, Metiram zinc as spore germination inhibitors.
A field trial of 5 mycelium growth inhibitors, has confirmed the efficacy of Prochloraz, Propiconazol and Fluzilazol. The trial demonstrated that 10 % infected fruits caused a loss yield of 16 %.
Research continued in 1988 at CIREF and at GRISP, by a continuous screening of active fungicides and by a first control strategy trial, associating a preventive and a curative product.