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Foliar Application of Kaolin to Reduce Sunburn in ‘Red Delicious’ Apple
Erwerbs-Obstbau ( IF 1.3 ) Pub Date : 2019-12-12 , DOI: 10.1007/s10341-019-00464-y
Fatemeh Sarooghinia , Ali Khadivi , Ahmadreza Abbasifar , Alireza Khaleghi

Sunburn may occur in some horticultural crops such as apples, and can cause a lot of damages to fruit of most cultivars, especially red apples, such as Red Delicious cultivar. In the present research, the effect of different treatments of kaolin (0.00, 2.50, 5.00, and 7.50%) was studied on the severity of sunburn on fruit of apple ‘Red Delicious’. Foliar spraying of kaolin was carried out in two times including early-June and early-July. The results of early-June spraying showed that the amount of sunburn on the fruits was affected by the treatments so that there were no significant differences between treatments of 2.50, 5.00, and 7.50% kaolin, but those treatments showed significant differences with the control (0.00). In addition, the results of early-July showed that the amount of sunburn on the fruits was affected by the kaolin treatments so that the highest amount of sunburn was observed in the control fruits and lowest sunburn was in the fruits treated with 7.50% kaolin. The treatments of 5.00 and 7.50% kaolin in both spraying times had the highest effect on reduction of fruit sunburn. It can be concluded the treatment of 7.50% kaolin in early-June and early-July is the best to reduce the sunburn on fruit of apple ‘Red Delicious’.

中文翻译:

叶面喷施高岭土减少“红色美味”苹果的晒斑

晒伤可能会发生在某些园艺作物(例如苹果)中,并且可能对大多数品种的果实造成很多损害,尤其是红苹果(例如Red Delicious品种)的果实。在本研究中,研究了不同处理方式(0.00%,2.50%,5.00%和7.50%)的高岭土对苹果“ Red Delicious”果实晒伤严重程度的影响。高岭土的叶面喷洒两次,包括6月初和7月初。6月初喷洒的结果表明,处理对果实晒伤的量有影响,因此处理2.50%,5.00%和7.50%的高岭土之间无显着差异,但这些处理与对照相比有显着差异( 0.00)。此外,7月初的结果表明,水果上的晒斑量受高岭土处理的影响,因此在对照水果中观察到最高的晒斑量,而在7.50%的高岭土处理的水果中晒斑量最低。在两个喷洒时间内分别使用5.00%和7.50%的高岭土对减少水果晒伤的效果最高。可以得出结论,在6月初和7月初对7.50%的高岭土进行处理是减少苹果“ Red Delicious”果实晒伤的最佳方法。
更新日期:2019-12-12
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