Proceedings of the 20th GiESCO International Meeting (2017)

The fungal diseases that affect grapevine wood are very limiting factors for viticulture and difficult to control. Several pathogens are associated with these diseases, such as the fungi of the family Botryosphaeriaceae. In this context, this work aimed to verify the effect of chemical fungicides, biological agents and plant extracts on the control of fungi Botryosphaeriaceae, causal agents of death and decline of the vines.

The present work aimed to compare different control strategies for mealybugs (Planococcus ficus). The adaptive research experience was carried out in a vineyard of Tolombón, Cafayate, Salta (Argentina), in 2015/2016 period, in Cabernet Sauvignon variety, in vertical shoot.

The main strategy to control powdery mildew (Erysiphe necator [Schw.] Burr.) in Chilean vineyards is largely based on periodic fungicide spraying (up to 18 applications per season), which may lead to many environmental and human health risks.

Powdery mildew (Erysiphe necator) (PM) is the most important and impacting fungal disease of grapevine (Vitis vinifera L). This disease remains difficult to model and forecast accurately because (i) the first signs of the disease in the vineyard are hardly noticeable in the first 30- 40 days after the onset of the epidemic (three to four pathogen generations), and (ii) its spatial distribution within or between neighboring plots is heterogeneous.

Grapevine red blotch virus (GRBV) is a major concern for California winegrape growers since its discovery in 2012. Negative impacts on juice have been reported, though inconsistent. A treehopper, Spissistilus festinus, transmitted GRBaV in strict laboratory studies, but field evidence of transmission is lacking.

Plant-parasitic nematodes are cosmopolitan pests of wine grapes with yield losses worldwide estimated at approximately 5 to 8%. Managing plant-parasitic nematodes in wine grapes is challenging due to limited availability of effective nematicides and rootstocks with simultaneous resistance to multiple nematode species.