Grapevine pests and diseases under climate change in Ukraine

Abstract

An attempt to assess the meteorological factors and climate changes influence on grape pests and diseases was made. Using the example of grape berry moth, it is shown that temperature changes over a period of approximately 25 years ( 1988-1989 and 2014-2015 periods) affect the biophenology of the pest, changes in the dates of the indicators amount to an average of 7-10 days. The existence of a correlation between the number of days with a temperature above 25  C and the grape berry moth flight duration was shown (r=0.66). Detection of grapevine virus disease leafroll symptoms on the ‘Odesa Black’ variety in 1987-1991 and 2001-2005 showed a number of diseased plants increase from 1.5 to 7.2 %. Correlation analysis showed that the main factor that most affects the manifestation of leafroll symptoms is the amount of precipitation during the vegetation period. Positive correlation between the development of grape trunk disease esca symptoms on the 'Dobrynya' rootstock and wine variety 'Cabernet Sauvignon' and the average monthly temperature during the growing season (June-August, (r = 0.77 and r = 0.595) was observed.