Validation of fungicides and termination of spray intervals by OiDiag with VitiMeteo-Powdery Mildew Karl Bleyer and Walter K. Kast IOBC/OILB Meeting of Working Group Integrated Protection and Production in Viticulture 20.- 22. October 2015 Vienna, Austria State Institute for Viticulture, Oenology and Fruit Technology, Weinsberg
Homepage VitiMeteo - VM Oidium (Powdery Mildew) risk model for grapes
Index Value for flower clusters and grapes VitiMeteo Powdery Mildew-risk, example 2013 7 days prognosis Index-Value: Current risk for infections
VitiMeteo- Risk of Infections for Powdery Mildew Index value till 33% - low risk Index value till 66% - middle risk Index value more than 66% - high risk
OiDiag Index is calculated by this parameters 1. actual stage of the development of the vine 2. mean daily temperature 3. humidity 4. rainfall (sum/day) 5. wetness of leaves (hour/day)
Time lag after last spray - OiDiag 2015 last applied fungicide (active substance) fungicide active substance classification current index (risk of infections) low middle high 0-33 34-66 > 66 days of maximum time lag Netzschwefel Sulfur Kumar Vitisan Systhane 20 EW Topas Vegas Vento Power Talendo Dynali Vivando Collis Bicarbonate 1 11-14 7-8 6-7 Myclobutanil Penconazol Cyflufenamid 2 11-14 8-10 7-8 Quinoxifen, Myclobutanil Proquinazid Cyflufenamid, Difenoconazol Metrafenone Boscalid, Kreis.-methyl 3 14-16 11-13 9-10 Luna experience Fluopyram 4 *** 13-15 10-12
How is it possible to range the fungicides?? Open window Infections Basis ontogenetic resistance of grapes
field trials - powdery mildew open window Cabernet Dorsa 2013 applications in the window (W) for testing the products BBCH 15 16-19 57-59 68 71 75 79 80 Datum 15.5 4.6 14.6 24.6 5.7 15.7 25.7 7.8 untreated - - - - - - - - Standard Kumulus Dynali Talendo Luna Exp. Vivando Talendo Topas Topas Standard (W) Kumulus Kumulus Talendo Luna Exp. Vivando - Topas Topas Collis (W) Kumulus Kumulus Collis Collis Collis - Topas Topas Talendo (W) Kumulus Kumulus Talendo Talendo Talendo - Topas Topas Vivando (W) Kumulus Kumulus Vivando Vivando Vivando - Topas Topas Dynali (W) Kumulus Kumulus Dynali Dynali Dynali - Topas Topas Vegas (W) Kumulus Kumulus Vegas Vegas Vegas - Topas Topas
result of field trials - powdery mildew open window Cabernet Dorsa 2013 80 60 40 20 0 53,2 a % severity grapes b 34,5 d d d d 11,8 13,9 2,1 2,2 bc 28,7 b 37,4 Exchange of active substance
fungicide active substance classification Netzschwefel Kumar Vitisan Systhane 20 EW Topas Vegas Vento Power Talendo Dynali Vivando Collis Time lag after last spray - OiDiag 2015 How to use the table is explained in: last applied fungicide (active substance) Sulfur Bicarbonate Myclobutanil Penconazol Cyflufenamid Quinoxifen, Myclobutanil Proquinazid Cyflufenamid, Difenoconazol Metrafenone Boscalid, Kreis.-methyl current index (risk of infections) low middle high 0-33 34-66 > 66 days of maximum time lag 1 11-14 7-8 6-7 2 11-14 8-10 7-8 3 14-16 11-13 9-10 Luna experience Fluopyram 4 *** 13-15 10-12
Thanks to all colleagues and for your Interest