Published in Scientific Papers. Series B, Horticulture, Vol. LXVIII, Issue 2
Written by Alexandru BUCUR, Ana Cornelia BUTCARU, Cosmin Alexandru MIHAI, Florin STĂNICĂ
This study aims to screen new peach and nectarine cultivars for disease sensitivity. The peach orchard was planted in 2017 using 14 peach and 16 nectarines new cultivars, grafted on various rootstocks: Adesoto, Myrobalan 29C, Saint Julien A, and GF677 on two different planting systems: Trident and Vertical Axis. The planting distances varied from 4.0 x 1.5 m for Vertical Axis (1,666 trees/ha - 1,666 axis/ha) to 4.0 x 2.0 m for Trident (1,250 trees/ha - 3,750 axis/ha). The research was conducted over six years, and in the last year, 2023, leaves were analyzed in the growing season and at the end (late November). The leaves were harvested at three heights (bottom, half, and top of the tree canopy). Only ten leaves per cultivar were analyzed, and the incidence of the bacterial disease Xanthomonas arboricola pv. pruni (XANTPR) and Pseudomonas syringae pv. persicae (PSDMPE) was measured using a scanner and the WinFolia Software. Significant differences in bacterial disease incidence were registered in nectarine cultivars, according to the tree canopy, and the vertical axis showed more sensitivity.
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