THE EFFECT OF SEAWEED PRODUCT GOËMAR BM 86 AND POLLINUS, ON THE PERFORMANCE OF CHEMICAL THINNING USING NAA AND BA

A. Basak
The results of two experiments conducted in 2006 and 2008 on the apple cultivar ‘Gala Must’ are presented. In 2006, during wet and cool weather at blooming, trees were sprayed at full bloom with Pollinus at 200 ml/100 L, to improve pollination and increase fruit set. At fruitlet stage of 10 mm in diameter, other trees were sprayed with Paturyl 100 SL (10% benzyladenine (BA)) at a dose of 94 ml/100 L for fruitlet thinning. Untreated trees were used as controls. In the second experiment, trees were sprayed with Goëmar BM 86 three times at 600 ml/100 L at pink bud stage, at full bloom, and 2 weeks after bloom. At fruitlet stage of 10 mm in diameter, some of these trees were additionally sprayed for thinning with Pomonit Super 050 SL (5% NAA in triethanolamine salt) at a dose of 40 ml/100 L, or Paturyl 100 SL at a dose of 94 ml/100 L, or Biothinner (50 g BA + 5 mg NAA/L) at a dose of 75 ml/100 L. The thinning agents were used separately in another group of trees for comparison. Treatment with Pollinus significantly induced abscission of fruitlets in trees sprayed with Paturyl 100 SL, while this thinning agent used in trees untreated with Pollinus was not effective. Treatment with Goëmar BM 86 alone caused an increase in the number of spurs with 4 fruits, but there was no effect on mean fruit weight and total yield. Goëmar BM 86 had no effect on fruit firmness at harvest but significantly reduced sugar content and diminished red coloration of apples, and improved the results of thinning with Pomonit Super 050 SL. It caused significant reduction of the number of fruit per tree and the total yield in trees sprayed with Pomonit Super 050 SL. Thinning by Biothinner (Bioprzerzedzacz) significantly increased mean fruit weight, red color and sugar content in apples treated with Goëmar, but had no effect on fruit set. Paturyl 100 SL application in trees treated with Goëmar BM 86 showed significant better red color of apples.
Basak, A. (2012). THE EFFECT OF SEAWEED PRODUCT GOËMAR BM 86 AND POLLINUS, ON THE PERFORMANCE OF CHEMICAL THINNING USING NAA AND BA. Acta Hortic. 932, 109-115
DOI: 10.17660/ActaHortic.2012.932.15
https://doi.org/10.17660/ActaHortic.2012.932.15
Ascophyllum nodosum, benzyladenine, naphthalene acetic acid, fruit set, yield, fruit quality
English

Acta Horticulturae