Risultati di un triennio di lotta all’oidio del carciofo in Sardegna

Three-years of control trials against the powdery mildew of artichoke in Sardinia The results of field trials carried out in 1999-2001 in Sardinia against powdery mildew [Leveillula tourica Lév.) Arn. f. sp. cynarae Jacz.] on artichoke {Cynara scolymus L.) are reported. Treatments were performed by applying several registered or experimental compounds. The efficacy of quinoxyfen and azoxystrobin, which was tested alone or in rotation with others fungìcides, was compared with specific chemicals usually applied on artichoke to control powdery mildew. Quinoxyfen and azoxystrobin, alone or in rotation with penconazole, proved to be very effective against powdery mildew even in the presence of high disease pressure. A satisfactory control was provided by pyrifenox, fenarimoi, nuarimol, hexaconazole, penconazole, tetraconazole and, to a lesser extent by dinocap. Control of powdery mildew with mixtures of hexaconazole + copper oxychloride and nuarimol + copper hydroxide was unsatisfactory, due to a negative influence of copper compounds.