engleski

Strategies implemented for flavescence dorée control in European winegrowing regions

Flavescence dorée (FD) is a vector-transmitted phytoplasma disease that causes important economic losses in European winegrowing regions and currently applied control strategies are only partially efficient. Practices applied in FD management were identified within Horizon 2020 WINETWORK project with the aim to contribute to a more efficient and environmentally responsive FD control. An interview survey was conducted in ten winegrowing regions within seven European countries. Interview questions were designed to collect winegrowers’ knowledge and innovative practices in FD management. At least 20 experienced winegrowers per region were selected and interviewed (in total 219 interviews), which had been selected according to their active participation in wine producing sector, good knowledge on FD, implementation of innovations and significant interest in disease management strategies. Collected data was analysed and practices that were recognized as useful were selected for further dissemination. Our findings indicate that timely and accurate vector monitoring is crucial to prevent spatial phytoplasma transmission and epidemic disease spread. In areas where FD is present, collective management, which includes both vector control and removal of phytoplasma-infected vines, efficiently limits or decreases disease spread. Innovative strategies identified were primarily oriented to biological vector control with natural compounds (clay, pyrethrum, orange essential oils and extracts), while no completely effective practice to control phytoplasma in grapevine or vector has been identified. Hot water treatment was identified as a potential measure for phytoplasma eradication in plant material in nurseries. It is concluded that large variation in overall FD knowledge between regions and implementation of practices with different efficiency rates may contribute to phytoplasma spread in new viticulture areas. It has been identified that producers efficiently recognize FD symptoms in a higher rate in regions with FD presence than in regions where phytoplasma has not yet been identified. Furthermore, in regions where FD is not present control strategies are not implemented in large scales, which could lead to rapid disease spread in case of phytoplasma introduction.

flavescence dorée, management, control

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