Abstract
The efficacy of fungicides in suppression of diseases caused by Marssonina brunnea (Ell. et Ev.) P. Magn. and Melampsora spp. on poplar leaves is presented in this paper. The suppression was performed using three newer fungicides, which have not been studied in suppression of mentioned diseases in Serbia as yet (products Quadris, Equation Pro WG and Perfit). Also, the Copper lime 50 was used as test fungicide, whose efficacy was established previously by numerous authors. During biennial research in stoolbeds of clones Pannonia (Populus x euramericana) and S 6-36 (Populus deltoides), satisfactory results were obtained for suppression of both fungus Marssonina brunnea and Melampsora spp. using Quadris and Copper lime 50, while fungicides Equation Pro WG and Perfit showed significantly lower activity. This conclusion was based on the average number of acervules, i.e. uredosoruses per cm² leaf surface, formed on treated plants. During both years, no significant differences were found between treated and untreated 1-year-old plants in diameter and height increment.
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