Efficiency of new fungicides in the control of cucumber downy mildew causal agent
2001
Miletic, N. | Vuksa, P. | Ivanovic, M. (Poljoprivredni fakultet, Beograd - Zemun (Yugoslavia))
Pseudoperonospora cubensis (Berk and Curt) Rost. causing downy mildew in cucumber represents the major economic pathogen of cucumber. Severe infestations may imperil the entire cucumber production. The efficiency of some novel fungicides (dimethomorph, azoxystrobin) in the control of Pseudoperonospora cubensis was tested throughout 1997-1998. Metalaxyl was used as a standard. The experiment was conducted at the PIK "Zemun" sites (Serbia, Yugoslavia) using standard methods for testing the biological efficacy of fungicides (OEPP, 1990). The trials were carried out on salad and pickling cucumbers (cv. Regal). The sprayer Falson was used and 500 l/ha of fungicides were applied. During 1997 five treatments were employed. Four treatments at 7-day intervals were employed during 1998. Based on the results obtained the conclusion which tends to emerge is the high efficiency of the fungicides dimethomorph (90.3-97.1%), azoxystrobin (95.6-97.0%) followed by metalaxyl (40.2-84.0%) in the control of Pseudoperonospora cubensis.
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