Fungicide applications in wheat: prevent yield loss
Regarding fungicide selection for disease management keep in mind that fungicides respond differently depending on when they are applied in the overall disease cycle as well as what disease is occurring at that particular location. I’ve included two tables regarding fungicide trials that were conducted during 2012 in Stoneville, Miss. The specific variety planted was GA Gore, a rust-susceptible variety. Information presented in Table 1 relates to fungicide applications made at approximately Feekes 10. Table 2 is related to fungicide applications that were made later than what was intended (Feekes 10.5), immediately preceding flowering. Stripe rust was the predominant disease. However, low levels of leaf rust were also observed in plots. Plots were harvested at different times and this could account for some of the variation in test weight between Figure 1 and 2. More importantly, some of the greatest yield benefits were the result of a reduction in the overall observable disease between non-treated and treated plots. Again, the most consistent yield response is a result of a fungicide application in situations when disease is likely to occur.
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