Effect of the time and number of applications on the efficiency of some fungicides in controlling the causal organisms of major wheat diseases
1989
Balaz, F. (Poljoprivredni fakultet, Novi Sad (Yugoslavia). Institut za zastitu bilja)
An experiment has been conducted in conditions of Vojvodina province on two domestic wheat varieties (Yugoslavia and Skopljanka) to assess the effect of the time and number of applications on the efficiency of some fungicides in controlling Erysiphe graminis tritici, Puccinia recondita tritici, Septoria spp. and Fusarium graminis as an agent of fusariosis of wheat spike. There were three experimental variants of fungicide application: a single spraying at the stage of flag leaf forming, a single spraying at the beginning of wheat flowering, and two sprayings, one at the stage of flag leaf forming and another one at the beginning of wheat flowering. Two-year research results indicated that one application of a combination of fungicides at the beginning of wheat flowering was most efficient. The causal organisms were efficiently controlled as confirmed by high wheat yields. A single fungicide application at the stage of flag leaf forming did not provide a satisfactory level of protection against the fusariosis of wheat spike. The variant of two fungicide applications was not economical.
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