Apply thifluzamide early in spring to prevent wheat sheath blight.

Release Date:

2013-04-06

Early‑spring chemical control is an important strategy for managing wheat sheath blight. In current practice, agents such as Jinggang–Bacillus thuringiensis and Jinggang–Bacillus subtilis are commonly used; however, these products have a short residual efficacy, and farmers often wait until the disease has already appeared before applying them, resulting in poor control. Thifluzamide, a benzamide‑type fungicide registered for the management of rice sheath blight, exhibits high selectivity and demonstrates good efficacy against diseases including rust, smut, and sheath blight, with a residual activity lasting 30 to 45 days. Recent research on the application of thifluzamide in wheat has shown that, prior to tillering and jointing—around March 5 and March 15—applying 24% thifluzamide at a rate of … per mu…

　　Early‑spring chemical control is a key strategy for managing wheat sheath blight. In practice, formulations such as Jinggang–Bacillus velezensis and Jinggang–Bacillus subtilis are commonly used; however, these products have short residual activity, and farmers often wait until the disease has already established before applying them, resulting in limited efficacy. Thifluzamide, a benzamide‑type fungicide registered for the control of rice sheath blight, exhibits high selectivity and demonstrates strong protective and curative activity against diseases including rust, smut, and sheath blight, with a residual period of 30 to 45 days.

　　Recent research on the application of thiophanate‑methyl in wheat has shown that, prior to tillering and jointing—on March 5 and March 15—applying 10 mL and 20 mL per mu, respectively, of a 24% thiophanate‑methyl suspension concentrate resulted in disease control efficacies of 94.38% and 97.78%, and 97.41% and 97.41%, with zero incidence of white‑spike symptoms. In contrast, when the same formulation was applied on April 5 and April 15, after the crop had entered the jointing stage, the efficacy against wheat sheath blight declined markedly. These results indicate that the pre‑jointing period is the optimal window for managing sheath blight; applying 10–20 mL per mu of a 24% thiophanate‑methyl suspension concentrate effectively suppresses the disease, reduces the occurrence of white spikes, and yields significant yield increases.

　　(Source: Farmers’ Daily; Author: Zhang Lin, Yishan Town, Guanyun County, Jiangsu Province)

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