The Effect of pesticide usage on grape yeast

For the conventional vineyard, reducing pesticide usage is most important issue for converting to organic vineyard. In order study effect of on grape yeast, an investigation were designed in vintage 2020, ten vineyards (include two vineyards) with different treatment frequency index (TFI) chosen, and yeast population counted by method: cultivate method direct epifluorescence technique (DEFT). The results show, from Moldova exist viable but non-culturable (VBNC) state. vineyards, less proportion reach VBNC, however opposite conclusion draw vineyards. High TFI high level VBNC population, inversely, culturable yeast. No matter which state, powdery mildew influential factor population.