Candidatus Phytoplasma solani

The blackwood disease ( Bois noir ) is a occurring in grapevine disease that is triggered by ( stolbur ) phytoplasmas ( Phytoplasmose ) and is among the yellowing diseases in viticulture. The phytoplasmas are transmitted by leafhoppers phloemsaugende from plant to plant. The infection results in the following year to first symptoms: The infected Rebholz does not mature fully in the summer and dies after the winter becomes black from. In case of red vine leaves are sector-wise red, with white varieties, however, light green ( chlorotic ); in both cases, the leaves roll up at the edges. The berries ripen delayed, bitter and dry out.

Transformer and control measures

The main transformer of blackwood disease is the Glasflügelzikade Hyalesthes obsoletus. The transmission of this disease but has been scientifically proven in another cicada namely Reptalus panzeri ( Rosenglasflügelzikade ). In search of their host plants infected cicadas can accidentally puncture vines and thus transmitted phytoplasmas on the vine. In order to curb the Phytoplasmose, the affected vines are pruned in summer and nettles removed in the growing area of the wine. The nettle - fight with glyphosate should take place outside of the cicadas - flight phase to prevent search engravings on the vines.

Can be confused blackwood disease with the Yellow Gold yellowing.