European grapevine moth in the Douro region: voltinism and climatic scenarios

The European grapevine moth, Lobesia botrana (Lepidoptera: Tortricidae) is considered to be the main pest in vineyards of Douro Demarcated Region (DDR) due economic losses it can cause. Damage caused by larvae this feeding on grape clusters, rendering them susceptible Botrytis cinerea mid-season and leading development primary secondary rot at harvest. Understanding pest´s behaviour region under future climate scenarios an increasing challenge. Hence, present study aims assess potential effects two likely change (Representative Concentration Pathways, RCP4.5 RCP8.5) phenology, particularly beginning peak three flights. Our findings show that phenological events generally occur earlier all locations mostly during long-term period 2021–2080, being 7 12 days advance scenario, 15 24 RCP8.5, when compared current values (2000–2019) regardless flight number. These results suggest a fourth complete future, will become tetravoltine species region. (male catches) infestation over periods with daily temperatures above its upper limit (> 33 °C) were also analysed 2000–2019 targeted sites. upward trend number maximum temperature °C tended accompanied decrease total male catches second third flights, as well percentage attacked bunches generations. Overall, expected influence phenology DDR.