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Safaei-Nejad, G., Shahsavar, A., Mirsoleimani, A. (2015). Effects of Naphthalene Acetic Acid and Carbaryl on Fruit Thinning in ‘Kinnow’ Mandarin Trees. Journal of Chemical Health Risks, 5(2), -. doi: 10.22034/jchr.2015.544101
Golnar Safaei-Nejad; Ali-Reza Shahsavar; Abbas Mirsoleimani. "Effects of Naphthalene Acetic Acid and Carbaryl on Fruit Thinning in ‘Kinnow’ Mandarin Trees". Journal of Chemical Health Risks, 5, 2, 2015, -. doi: 10.22034/jchr.2015.544101
Safaei-Nejad, G., Shahsavar, A., Mirsoleimani, A. (2015). 'Effects of Naphthalene Acetic Acid and Carbaryl on Fruit Thinning in ‘Kinnow’ Mandarin Trees', Journal of Chemical Health Risks, 5(2), pp. -. doi: 10.22034/jchr.2015.544101
Safaei-Nejad, G., Shahsavar, A., Mirsoleimani, A. Effects of Naphthalene Acetic Acid and Carbaryl on Fruit Thinning in ‘Kinnow’ Mandarin Trees. Journal of Chemical Health Risks, 2015; 5(2): -. doi: 10.22034/jchr.2015.544101

Effects of Naphthalene Acetic Acid and Carbaryl on Fruit Thinning in ‘Kinnow’ Mandarin Trees

Article 6, Volume 5, Issue 2, Summer 2015  XML PDF (712.64 K)
DOI: 10.22034/jchr.2015.544101
Authors
Golnar Safaei-Nejad 1; Ali-Reza Shahsavar1; Abbas Mirsoleimani2
1Department of Horticultural Science, Collage of Agriculture, Shiraz University, Shiraz, Iran
2Department of Horticultural Science, Collage of Agriculture and Natural Resources of Darab, Shiraz University, Shiraz, Iran
Receive Date: 08 April 2015,  Revise Date: 18 February 2019,  Accept Date: 29 October 2018 
Abstract
Several fruit trees including some cultivars of citrus tend to develop irregular bearing. Fruit thinning has been used for hundreds of years to manipulate blooming and crop load to improve the alternate bearing process. Frequently, combination sprays of two or more chemical thinners are used in various fruit trees and the thinning responses were additive and more effective than individual compounds. In this study, we investigated the effects of Naphthalene acetic acid and carbaryl alone and in combination in thinning of ‘Kinnow’ mandarin (Citrus reticulata Blanco) trees. Some characteristics such as fruit weight, diameter and volume, total soluble solid (TSS), titrable acidity (TA), TSS/TA, vitamin C and peel thickness were measured prior to harvest for 2010 and 2011 as a complete randomized block design with 13 treatments and four replications. Results showed that the application of NAA and carbaryl alone in June drop stage of fruit growth increased fruit thinning percentage, TSS of fruit juice, fruit weight, volume, diameter and length. These chemical thinners improved fruit size significantly by increasing the leaf/fruit ratio. Combination sprays could not effectively thin fruits than individual chemicals and thus had no effect on fruit size. Fruit characteristics such as TA, ascorbic acid, TSS/TA ratio and peel thickness were not affected by our treatments.     
Keywords
Carbaryl Chemical thinner Citrus Fruit size Naphthalene acetic acid (NAA) Return bloom
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