Abstract
Application of the butylglycol ester of 2,4-DP increased final fruit size in loquat without causing fruit thinning. Its effectiveness depended on the concentration applied and treatment date. When applied at the onset of the cell enlargement fruit stage, 25 mg l−1 was the most effective treatment. Fruit diameter distribution showed a significant shift to the larger size for treated trees; further, fruit colour break and maturation were encouraged and harvest time was earlier than in untreated trees.
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Agustí M., Speroni C., Juan M. and Almela V.1993. Efecto del ácido 2,4-diclorofenoxipropiónico sobre la calidad del fruto en melocotoneros y nectarinas. Actas Hort.9: 155-160.
Agustí M., Almela V., Aznar M., El-Otmani M. and Pons J.1994a. Satsuma mandarin fruit size increased by 2,4-DP. HortSci29: 279-281.
Agustí M., Juan M., Almela V. and Speroni C.1994b. The effect of 2,4-DP on fruit development in apricots (Prunus armeniaca L.). Scientia Hort.57: 51-57.
Agustí M., Juan M., Almela V., Andreu I. and Speroni C.1997. Estímulo del desarrollo de los frutos de hueso. Generalitat Valenciana, Sèrie Divulgació Técnica n. 38, Valencia, Spain, 78pp.
Agustí M., Almela V., Andreu I., Juan M. and Zacarías L.1999. Synthetic auxin 3,5,6-TPA promotes fruit development and climacteric in Prunus persica L. Batsch. J. Hort. Sci. Biotechnol.74: 556-560.
Agustí M., Juan M., Almela V. and Gariglio N.2000. Loquat fruit size is increased through the thinning effect of naphthaleneacetic acid. Plant Growth Regul.31: 161-171.
Agustí M., Zaragoza S., Iglesia D.J., Almela V., Primo-Millo E. and Talón M.2002. The synthetic auxin 3,5,6-TPA stimulates carbohydrate accumulation and growth in citrus fruit. Plant Growth Regul.36: 141-147.
Blanco A.1987. Fruit thinning of peach tree (Prunus persica (L.) Batsch): the effect of paclobutrazol on fruit drop and shoot growth. J. Hort. Sci.62: 147-155.
Dann I.R., Wildes R.A. and Chalmers D.J.1984. Effect of limb girdling on growth and development of competing fruit and vegetative tissues of peach Prunus persica. Aust. J. Plant Physiol.11: 49-58.
El-Otmani M., Agustí M., Aznar M. and Almela V.1993. Improving the size of 'Fortune' mandarin fruits by the auxin 2,4-DP. Scientia Hort.55: 283-290.
Eti S., Kilavuz M. and Kaska N.1990. The effect of flower thinning by chemicals and by hand on fruit set and fruit quality in some loquat cultivars (Eriobotrya japonica Lindl.). I. The application of NAAm and Ethrel to the cultivars Ottawiani, Baffico and Champagne de Grasse. Bahce19: 1-9.
Martínez-Calvo J., Badenes M.L., Llácer G., Bleiholder H., Hack H. and Meier U.1999. Phenological growth stages of loquat tree (Eriobotrya japónica (Thumb) Lindl). Ann. Appl. Biol.134: 353-357.
Mehouachi J., Serna D., Zaragoza S., Agustí M., Talón M. and Primo-Millo E.1995. Defoliation increases fruit abscission and reduces carbohydrate levels in developing fruits and woody tissues of Citrus unshiu. Plant Sci.107: 189-197.
Schiaparelli A., Schreiber G. and Bourlot G.1995. Fitoregolatori in agricoltura. Edagricole, Bologna, Italy, 319pp.
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Agustí, M., Gariglio, N., Castillo, A. et al. Effect of the synthetic auxin 2,4-DP on fruit development of loquat. Plant Growth Regulation 41, 129–132 (2003). https://doi.org/10.1023/A:1027333123649
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DOI: https://doi.org/10.1023/A:1027333123649