Sensor-based variable-rate fungicide application in winter wheat

2016 ◽  
Vol 72 (10) ◽  
pp. 1888-1896 ◽  
Author(s):  
Maria Tackenberg ◽  
Christa Volkmar ◽  
Karl-Heinz Dammer
Keyword(s):  
Winter Wheat ◽  
Variable Rate ◽  
Fungicide Application

Impact of sensor-controlled variable-rate fungicide application on yield, senescence and disease occurrence in winter wheat fields

2018 ◽  
Vol 74 (6) ◽  
pp. 1251-1258 ◽  
Author(s):  
Maria Tackenberg ◽  
Christa Volkmar ◽  
Michael Schirrmann ◽  
Antje Giebel ◽  
Karl-Heinz Dammer
Keyword(s):  
Winter Wheat ◽  
Variable Rate ◽  
Fungicide Application ◽  
Disease Occurrence

scholarly journals Economic returns from fungicide application to control foliar fungal diseases in winter wheat

2011 ◽  
Vol 30 (6) ◽  
pp. 685-692 ◽  
Author(s):  
Stephen N. Wegulo ◽  
Michael V. Zwingman ◽  
Julie A. Breathnach ◽  
P. Stephen Baenziger
Keyword(s):  
Winter Wheat ◽  
Fungal Diseases ◽  
Economic Returns ◽  
Fungicide Application

scholarly journals Effects of Integrating Cultivar Resistance and Fungicide Application on Fusarium Head Blight and Deoxynivalenol in Winter Wheat

Plant Disease ◽  
2011 ◽  
Vol 95 (5) ◽  
pp. 554-560 ◽  
Author(s):  
Stephen N. Wegulo ◽  
William W. Bockus ◽  
John Hernandez Nopsa ◽  
Erick D. De Wolf ◽  
Kent M. Eskridge ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Fusarium Head Blight ◽  
Field Experiments ◽  
Economic Losses ◽  
Cultivar Resistance ◽  
Head Blight ◽  
Resistant Cultivars ◽  
Fungicide Application ◽  
Fungicide Efficacy ◽  
Moderately Resistant

Fusarium head blight (FHB) or scab, incited by Fusarium graminearum, can cause significant economic losses in small grain production. Five field experiments were conducted from 2007 to 2009 to determine the effects on FHB and the associated mycotoxin deoxynivalenol (DON) of integrating winter wheat cultivar resistance and fungicide application. Other variables measured were yield and the percentage of Fusarium-damaged kernels (FDK). The fungicides prothioconazole + tebuconazole (formulated as Prosaro 421 SC) were applied at the rate of 0.475 liters/ha, or not applied, to three cultivars (experiments 1 to 3) or six cultivars (experiments 4 and 5) differing in their levels of resistance to FHB and DON accumulation. The effect of cultivar on FHB index was highly significant (P < 0.0001) in all five experiments. Under the highest FHB intensity and no fungicide application, the moderately resistant cultivars Harry, Heyne, Roane, and Truman had less severe FHB than the susceptible cultivars 2137, Jagalene, Overley, and Tomahawk (indices of 30 to 46% and 78 to 99%, respectively). Percent fungicide efficacy in reducing index and DON was greater in moderately resistant than in susceptible cultivars. Yield was negatively correlated with index, with FDK, and with DON, whereas index was positively correlated with FDK and with DON, and FDK and DON were positively correlated. Correlation between index and DON, index and FDK, and FDK and DON was stronger in susceptible than in moderately resistant cultivars, whereas the negative correlation between yield and FDK and yield and DON was stronger in moderately resistant than in susceptible cultivars. Overall, the strongest correlation was between index and DON (0.74 ≤ R ≤ 0.88, P ≤ 0.05). The results from this study indicate that fungicide efficacy in reducing FHB and DON was greater in moderately resistant cultivars than in susceptible ones. This shows that integrating cultivar resistance with fungicide application can be an effective strategy for management of FHB and DON in winter wheat.

scholarly journals Winter Wheat Grain Yield Response to Fungicide Application is Influenced by Cultivar and Rainfall

2019 ◽  
Vol 35 (1) ◽  
pp. 63-70
Author(s):  
Emmanuel Byamukama ◽  
Shaukat Ali ◽  
Jonathan Kleinjan ◽  
Dalitso N. Yabwalo ◽  
Christopher Graham ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Yield Response ◽  
Wheat Grain ◽  
Fungicide Application

scholarly journals Improved Prediction of Leaf Emergence for Efficacious Crop Protection: Assessing Field Variability in Phyllotherms for Upper Leaves in Winter Wheat and Winter Barley

Agronomy ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1825
Author(s):  
Moussa El Jarroudi ◽  
Louis Kouadio ◽  
Jürgen Junk ◽  
Clive H. Bock
Keyword(s):  
Winter Wheat ◽  
Disease Risk ◽  
Flag Leaf ◽  
Crop Protection ◽  
Absolute Error ◽  
Winter Barley ◽  
Prediction Errors ◽  
Fungicide Application ◽  
Leaf Emergence ◽  
Environmentally Sound

The choice of the phyllotherm value for predicting leaf emergence under field conditions is pivotal to the success of fungicide-based disease risk management in temperate cereals. In this study, we investigated phyllotherm variability for predicting the emergence of the three uppermost leaves (i.e., three last leaves to emerge) in winter wheat and winter barley fields. Data from four sites representative of wheat and barley growing regions in Luxembourg were used within the PROCULTURE model to predict the emergence of F-2, F-1 and F (F being the flag leaf) during the 2014–2019 cropping seasons. The phyllotherms tested ranged between 100 °Cd and 160 °Cd, in 15 °Cd steps, including the current default value of 130 °Cd. The comparisons between the observed and predicted emerged leaf area were qualitatively evaluated using the mean absolute error (MAE), the root mean square error (RMSE) and Willmott’s index (WI). A phyllotherm of 100 °Cd accurately and reliably predicted the emergence of all three upper leaves under the various environmental conditions and crop cultivars of winter wheat and winter barley over the study period. MAE and RMSE were generally <5% and the WI values were most often ≥0.90 for F-1 and F. For phyllotherm values ≥115 °Cd, the prediction errors generally increased for F-1 and F, with MAE and RMSE exceeding 20% in most cases. F-2 agreement between observed and predicted values was generally similar when using 100 °Cd or 115 °Cd. These results tie in valuable, complementary information regarding the variability of phyllotherms within leaf layers in winter wheat and winter barley in Luxembourg. Accurate and reliable leaf emergence prediction from F-2 to F allows for timely fungicide application, which ensures lasting protection against infections by foliar fungal disease pathogens. Hence, understanding phyllotherms can help ensure timely, environmentally sound, and efficacious fungicide application while increasing the likelihood of improved yields of winter wheat and winter barley.

Effects of fungicide chemical class, fungicide application timing, and environment on Fusarium head blight in winter wheat

2020 ◽  
Vol 158 (3) ◽  
pp. 667-679
Author(s):  
Carlos Bolanos-Carriel ◽  
Stephen N. Wegulo ◽  
P. Stephen Baenziger ◽  
Deanna Funnell-Harris ◽  
Heather E. Hallen-Adams ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Fusarium Head Blight ◽  
Head Blight ◽  
Application Timing ◽  
Fungicide Application ◽  
Chemical Class
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