The Effect of Irrigation on the Occurrence and Intensity of Venturia Inaequalis of Apple
Uticaj navodnjavanja na intenzitet pojave Venturia Inaequalis kod jabuke
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Author
Aksic, Miroljub
Sekularac, Gordana
Gudzic, Nebojsa
Gudzic, Slavisa
Knezevic, Jasmina
Grcak, Dragan
Grcak, Milosav
Keywords
irrigationapple
Venturia Inaequalis
navodnjavanje
jabuka
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The highest intensity of V. Inaequalis attack on apple leaf was noted in the control variant without application of fungicide. In the variant with pre-irrigation soil moisture, 80% of PVK was 26% and gradually decreased to control irrigation without irrigation (20%). The lowest infestation intensity was on the control variant without irrigation (0.6%), where treatment with the fungicide Score was performed. The largest percentage of the intensity of attack by V. Inaequalis on apple fruit was on the variant without chemical protection (6.2%), where pre-irrigation soil moisture was maintained at 80% of PVK. In all variants with chemical protection in irrigation conditions there was a low intensity of attack by V. Inaequalis (0.1-0.5%). Najveći intenzitet napada V. Inaequalis na lišću jabuke zabeležen je na kontrolnoj varijanti bez primene fungicida. Na kontrolnoj varijanti sa predzalivnom vlažnošću zemljišta 80% od PVK procenat zaraze bio je 26% i postepeno opadao ka kontrolnoj varijanti bez navodnjavanja (20%). Najmanji intenzitet zaraze je bio na kontrolnoj varijanti bez navodnjavanja (0,6%), gde je obavljen tretman sa fungicidom Score. Najveći procenat intenziteta napada V. Inaequalis na plodu jabuke bio je na varijanti bez hemijske zaštite (6,2%), gde je održavana predzalivna vlažnost zemljišta 80% od PVK. Na svim varijantama sa hemijskom zaštitom u uslovima navodnjavanja ostvaren je nizak intenzitet napada V. Inaequalis (0,1-0,5%).