Chemical control of grey mould of cyclamen
1996
Minuto, A. | Gullino, M.L. | Garibaldi, A. (Department di Valorizzazione e Protezione delle Risorse Agroforestali, Torino (Italy). Patologia vegetale)
Grey mould, incited by Botrytis cinerea, can cause serious damages on cyclamen in the presence of conditions highly favourable to the pathogen. Its control relies, beside the adoption of appropriate cultural techniques, on the application of chemicals. However, chemical control is complicated by the widespread presence of populations of B. cinerea resistant to benzimidazoles and dicarboximides. Several experimental trials have been carried out during the past 5 years in order to test the efficacy of different fungicides, chosen among, those already available and some new ones at present under development. Among the already available fungicides, the mixtures of carbendazim and diethofencarb, procymidone and thiram and chlozolinate and thiram performed well in all trials. Among the new fungicides, fludioxonil, alone and in mixture with cyprodinil were highly effective. Also pyrimethanil provided good disease control. By considering the phytoxicity, among the tested fungicides and under our experimental conditions, only anilazine, chlorothalonil, fluazinam and tebuconazole caused unacceptable flower injury.
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