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Significance of potential vectors of stolbur phytoplasmas to grapevine and potato in Germany and Hungary
Project
Project code: JKI-OW-08-1190
Contract period: 01.10.2014
- 30.09.2016
Purpose of research: Applied research
Stolbur-phytoplasmas are important pathogens in agriculture and field crops like potato and corn. The most important vector is Hyalesthes obsoletus. Beside this planthopper, other species of the families Cixiidae and Cicadellidae are proved or suspected vectors of stolbur-phytoplasmas, which they transmit from wild reservoirs to cultivated plants. There is evidence of a variable role of different species depending on regional aspects and the affected crop. The role of planthopppers of the genus Reptalus and possibly also other genera will be assessed under the varying climatic and agricultural conditions of Germany and Hungary in the frame of a bilateral cooperation. The objectives are: a - Identify species of Reptalus and probably other Cixiid generat that carry stolbur phytoplasma in the viticultural environment or in potato fields. b - Assess the ability of those species to transmit stolbur-phytoplasmas to the respective cultivated hosts. c - Identify natural plant hosts of those specie and asssess their epidemiologcial role.
Stolbur-phytoplasmas are important pathogens of grapevine and potato. Other Cixiidae beside the planthopper Hyalesthes obsoletus are potential vectors of stolbur, whose significance might vary according to regional conditions and the crop. The role of planthopppers of the genus Reptalus and possibly also other genera will be assessed under the varying climatic and agricultural conditions of Germany and Hungary. The objectives are: (a) to identify species of Reptalus and probably other Cixiids that carry stolbur phytoplasma; (b) to assess the ability of those species to transmit stolbur-phytoplasmas to the respective cultivated hosts; (c) to identify natural plant hosts of those species and asssess their epidemiologcial role. Repta/us panzeri, an otherwise rare species in Germany, was abundant in steep-slope vineyards on various herbaceaus and woody host plants including grapevine. However, the proportion of infected specimens was less than 1 %. The planthopper failed to transmit stolbur to experimental host plants in transmission experiments. ln Hungary, several Cixiid species were present in vineyards as weil as in potato- and corn-fields. Although less abundant compared to German vineyards, a high proportion of specimens was infected by stolbur. Both R. quinquecostatus and Dictyophara europaea inoculated experimental plants successfully. Since the stolbur pathosystem is considerably affected by weather conditions, the study will be repeated in 2016.
Section overview
Subjects
- Crop Protection
- Viticulture
Framework programme
Funding programme
Excutive institution
Institute for Plant Protection in Fruit Crops and Viticulture - Fruit Cops (JKI-OW)
