INDUCTION OF APPLE TREE BUDDING BY HYDROG ENATED CYANAMIDE AND MINERAL-OIL UNDER INFLUENCE OF TEMPERATURE

Authors
Citation
Jl. Petri, INDUCTION OF APPLE TREE BUDDING BY HYDROG ENATED CYANAMIDE AND MINERAL-OIL UNDER INFLUENCE OF TEMPERATURE, Pesquisa agropecuaria brasileira, 32(1), 1997, pp. 71-75
Citations number
13
Categorie Soggetti
Agriculture,"Agriculture Dairy & AnumalScience
ISSN journal
0100204X
Volume
32
Issue
1
Year of publication
1997
Pages
71 - 75
Database
ISI
SICI code
0100-204X(1997)32:1<71:IOATBB>2.0.ZU;2-G
Abstract
Dormancy breaking in apple (Malus domestica B.) orchards with chemical s is a very common practice in regions with mild winter. When mineral oil and dinitro-ortho-cresol (DNOC) are recommended, they are used at temperatures above 20 degrees C. The effect of other temperatures on t he efficiency of hydrogenated cyanamide and mineral oil is not known. In this work the effect of temperature on hidrogenated cyanamide and m ineral oil on dormancy breaking of apple trees was evaluated. Apple sc ions of cultivars Gala and Fuji received a treatment with mineral oil at 4% plus hydrogenated cyanamide at 0.25% and were submitted to diffe rent combinations of temperature before and after having received the chemical treatment. The trial was carried out during three years. Perc entage of bud breaking was evaluated at 40 and 60 days after treatment s were performed. This breakage strongly increased when mineral oil tr eatment (4%) and hydrogen cyanamide (0.25%) were used. Temperatures of 4 degrees C three days before or after application did not reduce the efficiency of mineral oil plus hydrogenated cyanamide. This aspect al lows concluding that the efficiency of mineral oil plus hydrogenated c yanamide is not related to the temperature.