The effects of accel and carbaryl on fruit set and fruit quality of three apple
Abstract
Chemical thinning of apple is a practice conducted to improve fruit size, fruit quality, increase return of bloom and promote tree vigor. Several plant growth regulators are used to thin fruit trees. A study was conducted to determine the effect of Carbarly and Accel on thinning three apple cultivars in Mississippi. Experiments were carried out in 1995 and 1996 to investigate the effect of Accel (N-(Phenylmethyl) (H-purine 6- amine (6BA) and carbaryl (1-Naphthyl methyl carbamate) sprayed two weeks postbloom on fruit set, yield and fruit quality of three apple (Malus Pumila Mill) cultivars; 'Empire', 'Jon-A-Red' and 'Braeburn'. The treatments consisted of Accel (25, 50 and 75ppm), Carbaryl (0.05, 0.1 and 0.2%) and unsprayed control. Thinning trials conducted over two years indicated that Accel and Carbaryl consistently thinned the three apple cultivars. Yield (total fruit weight per tree), pH, sugar content and percent fruit red colour were also increased by the treatments. Treatments did not influence the number of seeds in the fruit, fruit length, fruit diameter and fruit length to diameter ratio.
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