Maiden ‘Conference’ trees grafted on five clonal pear (Pyrus) rootstocks (FOX 11, FOX 16, OHXF 40, OHxF 87, OHxF 282), on Kirchensaller seedling rootstocks, and on five clonal quince (Cydonia) rootstocks (EM QA, EM QC, BA 29, Sydo, Adams) were tested in the field to evaluate their performance in the coastal area of central Italy. Trees were planted on a fertile loam alluvial soil at 5.0 x 3.0 m spacing in spring 1994, and trained as slender spindles. Phenologic and vegetative observations were carried out yearly. From 1997 onwards, trunk cross-sectional area, canopy volume, and pruning wood weight showed differences among clones, allowing rootstocks to be ranked according to the following order of decreasing vigour: Kirchensaller OHxF 282 > FOX 11 > OHxF 87 = OHxF 40 = Sydo = FOX 16 > BA 29 = EM QA > Adams > EM QC. In 1999, trunk cross sectional area reached an average of 36.3 cm2, with a maximum (52.7 cm2) in trees grafted on Kirchensaller and a minimum (19.6 cm2) in trees on EM QC. Medium vigour was shown by trees grafted on quince rootstocks Sydo, BA 29 and EM QA, and pear rootstocks FOX 16 and ‘OHxF 40’. The highest canopy volume in 1999 was obtained in trees grafted on Kirchensaller (2.6 m3). Slightly lower canopy volume values were detected for OHxF 282 and OHxF 40 (1.9 and 1.7 m3). Quince rootstocks give the lowest values, with the exception of Sydo, which showed a value similar to OHxF 87 and higher than FOX 16. Production has so far been very low, with a mean fruit quantity of 5.6 kg per tree. In 1999 the most productive trees were those grafted on OHxF 87 and OHxF 282, followed by those grafted on FOX 16, BA 29 and Sydo; EM QC gave the lowest production per tree. No significant differences in the most important phenologic stages were found amongst the tree grafted on the rootstocks: budbreak occurred within 3-4 days, depending on spring climatic conditions; time of flowering in trees grafted on pear rootstocks seemed slightly earlier than in trees grafted on quince rootstocks, except on Adams and BA 29; leaf fall generally occurred in October-November, and trees on quince rootstocks shed their leaves approximately 15 days earlier than trees on pear rootstocks.
|Autori:||Loreti F.; Massai R.; Fei C.; Cinelli F.|
|Titolo:||Performance of "Conference" cultivar on several quince and pear rootstocks: preliminary results|
|Anno del prodotto:||2002|
|Appare nelle tipologie:||1.1 Articolo in rivista|