In one of the largest vineyard in the Ribera del Duero region in Spain, a two-year efficacy trial of colloidal nutrients protocol on Tempranillo variety was conducted in 2014 and 2015 before full implementation. Three applications were applied in both campaigns to compare the efficacy of colloidal protocol against its standard protocol; At 20-40cm sprouting; At the start of flowering, and at around 50% veraison.
The standard protocol was the vineyards routine management use of nutrients and crop protection chemicals. The colloidal application was standard protocol, adjusted with the addition of OCC in application tank-mix, and with the reduction in nutrients, fungicides and pesticides.
In the 2014 campaign, 30% in nutrients, fungicide and pesticide dosage were reduced. In the 2015 campaign, 30% of fungicides and 25% of insecticides dosages were reduced. There was no incidence of diseases in both campaigns. Below are a snapshot of the results.
Colloidal protocols had approximately 25% more yield in both campaigns despite about 25% to 30% reduction in chemicals input in both campaigns.