JUSTIFICATION FOR SOUR ROT CONTROL MEASURES IN THE VINEYARDS
The paper summarizes results of a study conducted in 2016-2017 on the effectiveness of a system of prevention measures used against sour rot in Muscat white vineyards cultivated in the conditions of the South Coast viticultural zone of Crimea (Livadiya branch of Federal State Unitary Enterprise PJSC Massandra). A strong impact of biotic factors - oidium development and damage to the grapes caused by the thrips - on sour rot progression was established. The most effective strategies to control sour rot development on grapes by the time of the harvest proved to be effective protection against oidium, preventing damage caused by thrips to the berries, double spray treatments with specialized insecticides during ripening period for drosophila extermination and triple fertilizing with calcium to improve berry skin mechanical strength.