2 research outputs found
âJAFFAâ SWEET ORANGE PLANTS GRAFTED ONTO FIVE ROOTSTOCKS
<div><p>ABSTRACT Low genetic diversity of citrus scion and rootstock cultivars makes the crop more vulnerable to diseases and pests. The objective of this study was to evaluate the performance of âJaffaâ sweet orange grafted onto five rootstocks over six harvests in subtropical conditions in the north of ParanĂĄ state, Brazil. The experiment used a randomized block design, with six replications and two trees per plot, spaced at 7.0 m x 4.0 m. The rootstocks were: âRangpurâ lime, âCleopatraâ and âSunkiâ mandarins, âFepagro C-13â citrange, and âSwingleâ citrumelo. The variables evaluated were vigor, yield, and yield efficiency of the trees as well as the physical and chemical characteristics of the fruits. Data were subjected to analysis of variance, complemented by Scott-Knott test at 5% probability. The smallest tree canopy for âJaffaâ sweet orange plants was induced by the âRangpurâ lime rootstock. The trees had the same cumulative yield performance over six seasons for all rootstocks. The best yield efficiency for âJaffaâ sweet orange trees was provided by âFepagro C-13â citrange rootstock. With regard to fruit quality, no differences were observed among the rootstocks and the âJaffaâ sweet orange fruits met the standards required by the fresh fruit market and the fruit processing industry.</p></div