CHEMICAL THINNING OF APPLES IN RIO GRANDE DO SUL

During the 1984/1985 cycle, a chemical thinning experiment on Golden Delicious cultivar was made in Vacaria, RS. Treatments were: Carbaryl, ANA, the mixture of both, ANAm, ANAm followed by a mixture of Carbaryl + ANA, 13 days after.
The results obtained indicate that:

1. The mixtures of Carbaryl + ANA, full and half concentration, made strong thinning.

2. ANA alone thinned moderately.

3. Carbaryl gave inconsistent results.
   In case of being used, it will promote mild thinning.

4. A single application of ANA, was not effective.

5. ANAm followed by Carbaryl + ANA gave inconsistent results.

6. Fruit size increased in general, proportional to intensity of the thinning.

7. Amount of blooming in the following year may be considered as a consequence of thinning, however not always being proportional to its intensity.

8. ANAm reduced russeting.

International Workshop on Apple Culture in the Tropics and Subtropics

J.R. Tiscornia

https://doi.org/10.17660/ActaHortic.1988.232.19