When Do Foliar Pyraclostrobin Fungicide Applications Produce Profitable Soybean Yield Responses?

Fig. 6. Average soybean yield response to pyraclostrobin applications for categories of trials based on cumulative spring rainfall and visual differences between fungicide-treated (the greening effect") and non-treated strips as observed by the late-season CIR digital imagery of the soybean canopy. Means are shown with 90% confidence intervals. The graph shows results of 282 on-farm trials conducted between 2005 and 2009. Data for the highest category of spring rainfall (>16 inches) had only three observations for trials without visual differences and not shown on the graph.



Image from Plant Health Progress article:
When Do Foliar Pyraclostrobin Fungicide Applications Produce Profitable Soybean Yield Responses?