Abstract:
In an attempt to search for alternative to fungicides, certain new natural formulation (Plco-free) and Copper nanoparticles (CuNps) beside Montoro 30% (difencoconazole + propiconazol) fungicide were evaluated against CercosporabeticolaSacc, the causative fungus of leaf spot disease of sugar-beet (Beta vulgaris var. saccharifera, L.) under field conditions. Also, effect of the tested materials on some parameters of sugar-beet e.g. root fresh weight, soluble solid content(T.S.S), Chl.a, Chl.b, leaf temperature ,flow transpiration, Carbon dioxide rates, diffusive resistance, conductive coefficient and rate of pushing juice were estimated. The results showed that the biocontrol formulation was the most effective treatments against the leaf spot of sugar- beet followed by Montoro and CuNps respectively in both growing seasons. Assayed materials represent potential effective alternatives for fungicides in controlling the leaf spot of sugar-beet.