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W latach 2003-2008 oceniano wzrost, plonowanie oraz jakość owoców (Vf) - odpornych na parcha Venturia inaequalis (COOKE) WINTER ośmiu odmian i klonów jabłoni (Rajka, Resista, Rubinola, Sawa, Selena, Topaz, U 5656 i U 641), na podkładce M.9, posadzonych wiosną 2001 r. Biorąc pod uwagę roczne, sumaryczne plonowanie drzew (2003-2008) oraz współczynnik plenności za cały okres owocowania, wydzielono trzy...
W doświadczeniu przeprowadzonym w latach 1998-2008 oceniano wartość produkcyjną jednego klonu i trzech odmian jabłoni genetycznie odpornych na parcha, wyhodowanych w SGGW w Warszawie. Okulanty produkcji własnej odmian ‘Waleria’, ʻWitosʼ, ‘Sawa’ oraz klonu U1165 na podkładkach M.9, P2, P60, P22 i M.27 wysadzono w rozstawie 3,5 x 1,2 m (2381 drzew∙ha-1). Na podstawie 11-letnich badań stwierdzono, że...
Monitoring of the occurrence of V. inaequalis resistance to strobilurins (QoI - Quinone outside Inhibitors) was conducted in selected orchards in Poland in 2004 - 2009. During the first years of monitoring (2004 - 2007), a high level of resistance to strobilurins was observed in 54.7% of the orchards, with only some resistant forms or no resistance noted in the others. Monitoring carried out in the...
Apple scab caused by Venturia inaequalis is the most serious fungal disease of apple in Poland. The strategy for apple scab control relies mostly on multiple applications of fungicides, usually 8 to 15 times each gr owing season. Because of the reduction in the range of fungicides and the problem with resistance, alternative methods are being searched for to help control this disease. The objective...
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