Influence of growth regulators on productivity of plantation and quality of apple fruits

Abstract

The experimental plot is placed in the orchard “Codru-ST” Ltd. founded in 2012 year. The study subject of the experience was Idared apple variety grafted on M 9 rootstock. The distance of plantation is 3.5x 0.8 m. The research was conducted during the period of 2015 year. The tested agents was Humifield, WG, 0.2/0.2/0.2/0.2/0.2/0.2 kg/ha; Nertus PlantaPeg, 0.6/0.6/2.0 l/ha; Nertus PlantaPeg, 1.0/1.0/2.5 l/ha, which was sprayed in different period. During the research, it was studied the influence on the growth regulators on productivity of plantation and quality of apple fruits. It was established that the The Nertus PlantaPeg growth regulator can be included in the technology system to improve apple growth and fructification processes and reduce the etiquette release rate of fruit, applied 3 times by foliar spraying. The first treatment to be carried out in the "pink button" phase at a dose of 0.6 - 1.0 l/ha, the second - in the binding phase - the intensive growth of fruits (fruit diameter 20-25 mm).