Validation of fungicides and termination of spray intervals by OiDiag with VitiMeteo-Powdery Mildew

Transcription

1 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 October 2015 Vienna, Austria State Institute for Viticulture, Oenology and Fruit Technology, Weinsberg

2 Homepage VitiMeteo - VM Oidium (Powdery Mildew) risk model for grapes

3 Index Value for flower clusters and grapes VitiMeteo Powdery Mildew-risk, example days prognosis Index-Value: Current risk for infections

4 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

5 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)

6 Time lag after last spray - OiDiag 2015 last applied fungicide (active substance) fungicide active substance classification current index (risk of infections) low middle high > 66 days of maximum time lag Netzschwefel Sulfur Kumar Vitisan Systhane 20 EW Topas Vegas Vento Power Talendo Dynali Vivando Collis Bicarbonate Myclobutanil Penconazol Cyflufenamid Quinoxifen, Myclobutanil Proquinazid Cyflufenamid, Difenoconazol Metrafenone Boscalid, Kreis.-methyl Luna experience Fluopyram 4 ***

7 How is it possible to range the fungicides?? Open window Infections Basis ontogenetic resistance of grapes

8 field trials - powdery mildew open window Cabernet Dorsa 2013 applications in the window (W) for testing the products BBCH Datum 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

9 result of field trials - powdery mildew open window Cabernet Dorsa ,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

10 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 > 66 days of maximum time lag Luna experience Fluopyram 4 ***

11 Thanks to all colleagues and for your Interest