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Scientific Papers Series B Horticulture

Scientific Papers Series B Horticulture

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Figure 1. Shot hole and fruit stain produced by StigminacarpophilaFigure 2. Treatments in vegetation periodRESULTS AND DISCUSSIONSThe biological action of some fungicides on thedevelopment of Stigmina carpophila funguscolonies on leaves and fruits is presented inTable 4.Table 4. Biological action of some fungicides on the development of fungus colonies Stigmina carpophilaColony diameter (mm) at conc.%Inhibition percent at conc.%Product0,2 0,1 0,05 0,025 0,015 0,2 0,1 0,05 0,025 0,015Dithane M 45 0 7 10 16 20 98,6 70,0 65,0 37,1 11,5Bravo 500 SC 0 8 20 25 41 100 80,5 70,5 20,0 14,8Folicur Solo 250 EW 0 0 8 10,5 15 100 91,4 88,6 75,0 50,1Systhane CPU 0 0 8 19 31 100 100 78,5 58,6 42,5Score 250 EC 0 0 0 0 0 100 100 100 87,1 51,5Control70 mmBased on the data presented in Table 4 wereselected the products and their optimal concentrationwhich will further be used during thefield trials in order to control the fungusStigmina carpophila.The products with very good biological actionwere: Folicur Solo 250 EW in 0.1% concentration,Systhane C PU in 0.05% concentration,Score 250 EC in 0.02% concentration, Bravo500 SC in 0.2% concentration, Dithane M 45 in0.2% concentration.During the experiments there were taking intoaccount the 100% fungi inhibition in accordancewith the various factors acting towardsplants.The results obtained in field during the vegetationperiod are presented in Tables 5 and 6.Table 5. The frequency and intensity of the Stigmina carpophila attackTreatment product namePESINC PESSEV PESINC PESSEV PESINC PESSEV% % % % % %04.04.2012 09.05.2012 12.06.2012R 1 27.0 12.0 39.0 12.0 52.0 16.0Variant 1R 2 19.0 10.0 27.0 16.0 43.0 20.0R 3 28.0 9.0 34.0 14.0 48.0 23.0R 4 31.0 12.0 31.0 16.0 51.0 20.0Average 26.3 10.8 32.8 14.5 48.5 19.8R 1 16.0 6.0 20.0 11.0 21.0 13.0Variant 2R 2 12.0 4.0 18.0 12.0 31.0 21.0R 3 17.0 5.0 15.0 6.0 24.0 14.0R 4 14.0 4.0 21.0 10.0 28.0 12.0Average 14.8 4.8 18.5 9.8 26.0 15.0Variant 3 R 1 17.0 5.0 17.0 15.0 20.0 9.083

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