H.J. Weber
In order to overcome alternate bearing problems with cv. Elstar apple trees in the Rhine region, a two-year (1995–1996) field trial was conducted at Ahrweiler experimental station. Cv. Elstar apple trees were thinned either by hand, amid-thin or ethephon. The recommendations derived from the results are a) one application of [amid-thin (0.08%) + Ethrel (0.025%) at petal fall] and b) two applications of Ethrel (0.025%), on ca.5 June and 12 June and hand-thinning at the end of June.
Weber, H.J. (1998). FRUIT THINNING OF CV. ELSTAR. Acta Hortic. 466, 143-148
DOI: 10.17660/ActaHortic.1998.466.24
alternate bearing, flowering intensity, fruit quality, fruit firmness, gibberellin

Acta Horticulturae