Thinning trials for high-yielding cherry varieties.
High-yielding cherry varieties tend to excessive fruiting with too many too small fruits with low sugar content, poor flavor and a modest fruit set in the following year. In order to cope with the increasing cultivation of high-yielding varieties, thinning trials were carried out in 2015 and 2016.
Experiments showed that a treatment with Ammonium thiosulfate (ATS) is not a reliable thinning method for cherries. In 2015, as in 2016, no significant thinning effect could be observed. The fruit size was not affected by the thinning measures in this experiment. Even with massive hand thinning by 45%, the fruit sizes did not improve to the extent that the loss of income would have been made up for.