The influence of girdling on flower type, number, inflorescence density, fruit set, and yields in three different olive cultivars (Barnea, Picual, and Souri)

Abstract

The influence of girdling on flower type and number, inflorescence density, and fruit set in 3 different olive cultivars (Barnea, Picual, and Souri) under intensive growing conditions using saline irrigation water was studied for 3 years. The density of inflorescences on the branches was not affected by girdling in any of the 3 cultivars during any of the 3 consecutive years studied. Also, no clear relation between the number of flowers and girdling was found in any of the 3 cultivars tested. The percentage of perfect flowers on the girdled scaffolds of cvv. Barnea and Picual increased significantly, except for Picual in 2002 where no differences were observed. However, no such difference between the non-girdled and girdled scaffolds was observed in cv. Souri. Comparison of fruit set on non-girdled and girdled scaffolds showed a similar and generally positive response to the treatment in the examined cultivars. However, in the third year of the study, no significant difference between the non-girdled and girdled scaffolds was observed. A significantly higher yield of the girdled trees was measured in the 3 cultivars during the first year after the winter girdling. Due to the young age of the trees the effect of girdling on yield was not further recorded. Fruit size on the girdled scaffolds was smaller than those from the non-girdled ones, as a consequence a higher percentage of fruit set was observed on the first ones. The results presented in this study point to different varietal responses of olive trees to girdling. However, this might also be due to the young age of the trees in this study as well as the peculiar agronomic condition of the trees.

Resultados preliminares de tipos de anelamento em diferentes épocas em plantas de oliveira

“…Healing of the wounds produced by girdling was satisfactory in 'Grappolo 541' and 'Ascolano 315' plants and occurred immediately after the cut, corroborating LÓPEZ-RIVARES & GARCÍA (1990), who observed better healing of the wounds made in March and April in "Manzanilla" plants. Good healing of plants of the Maria da Fé variety was not observed, as some branches of this variety were dried out, with the presence of yellowed leaves.…”

“…In olive trees, studies show superior results with an increase of 50 per cent in flowering in low harvest years (off years) (LEVIN & LAVEE 2005) and a significant effect on production with successive girdlings (EL KHAWAGA 2007, AHMAD et al 2009). …”

Preliminary Evaluation of 29 Olive (Olea europaea L.) Cultivars for Production and Alternate Bearing, in the Huasco Valley, Northern Chile

“…Although the results are considered preliminary, owing to the juvenile state of the assay, this result should be considered in the subsequent evaluations of the assay, given that according to Levin and Lavee (2005) alternate bearing is still a serious problem in the cultivation of numerous fruit species, including olives, which consequently must be managed in order to minimize the adverse effects on production (Tapia et al, 2006). Unlike PML and PA03-07, ABI did not present significant differences among the 10 best varieties (Table 3).…”

Effect of Different Concentrations of Foliar Applications of Urea, NAA and Ethrel on Fruit Thinning of ‘Dolce’ Olive cv.

“…Moreover, NAA effects might be due to that to an improve of the internal hormonal and carbohydrate level of the canopy which is responsible for improving number of inflorescence (Levin and Lavee, 2005), flower number (Noor et al, 1995) fruit setting and fruit size in Kalamata olive cv. (Proietti &Tombesi, 1990 andPetrisou andVoyiatzis, 1994).…”

“…Meanwhile, NAA (mg. l -1 ) increased significantly fruit weight; in addition the control increased significantly seed length and weight during 2011 and 2012 seasons. Noor et al (1995), Mistra & Datta, (2001) and Levin & Lavee, (2005) reported that NAA improved number of inflorescence flower number fruit setting and fruit size.…”