ISHS Acta Horticulturae 800: X International Pear Symposium
THINNING PROGRAMS IN PEARS CV. WILLIAMS |
| Authors: | M.C. Dussi, G. Giardina, P. Reeb, J. Gastiazoro |
| Keywords: | 6 benzyladenine (BA), NAA, lime sulfur, sulfur, fruit size, firmness |
| Abstract:
Different thinning programs were studied for the pear cv. Williams using products of low environmental impact applied to fruits and flowers during the seasons 2000–01, 2001–02, 2005–06 and 2006–07 in the upper Valley of Río Negro, Patagonia, Argentina (38°55' south latitude). The trials tested the efficacy of 6-benzyladenine (BA), NAA, lime sulfur and sulfur at different doses and application times. Though high doses of lime sulfur and sulfur were applied at bloom time, these treatments did not induce a thinning response. BA improved effectiveness in chemical thinning, reduced labor costs for hand thinning and increased fruit size. No consistent statistical differences among treatments were observed in fruit flesh firmness, soluble solids content and number of seeds per fruit in the different experiments accomplished. BA showed a good performance as a thinning agent and should be considered when analyzing the type of bioregulator that can be applied in sustainable fruit production systems. | |
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