In recent years, banded leaf sheath blight in maize (Zea maysL.) has become an important disease that seriously affects quality and yield. This paper aims to evaluate the sensitivity ofRhizoctonia solaniKuhn to thifluzamide on maize, to clarify the effect of seed coating using a thifluzamide suspension agent on safety and physiological indicators and to determine the effectiveness of control of banded leaf sheath blight in the field. In this study, the thifluzamide sensitivity of 102 strains ofR. solaniin maize from Shandong was determined using the mycelial growth rate method; the average half-maximal effective concentration value (EC50) was 0.086 ± 0.004 μg/ml and displayed a unimodal frequency distribution, indicating that thifluzamide had strong inhibitory activity on the mycelial growth ofR. solaniin maize. In an indoor pot test, the root activities under 24 g a.i./100 kg seed were found to increase by 78.01%, compared with the control. Similarly, chlorophyll content increased most significantly at this dose, by 32.3%. Thifluzamide (FS) could significantly increase the per-plot yield. Among the examined dosages, 48 g a.i./100 kg seed had the most significant treatment effect, with the yield rate increasing by 15.7% and 14.1%, respectively, in 2017 and 2018 compared with the control. The field effectiveness against banded leaf sheath blight in maize was highest at the dosage of 48 g a.i./100 kg seed for a seed dressing with thifluzamide (FS). These results indicate that thifluzamide has enormous potential for controlling banded leaf sheath blight in maize.

中文翻译：

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立枯丝核菌在玉米中的基线敏感性建立及其田间应用

近年来，玉米带状纹枯病（玉米L.)已成为严重影响品质和产量的重要病害。本文旨在评估立枯丝核菌Kuhn 对 thifluzamide 对玉米进行了研究，以阐明使用 thifluzamide 悬浮剂的种子包衣对安全性和生理指标的影响，并确定田间带状纹枯病防治的有效性。本研究对 102 株茄属植物山东玉米采用菌丝体生长速率法测定；平均半最大有效浓度值（EC50) 为 0.086 ± 0.004 μg/ml，呈单峰频率分布，说明噻虫胺对菌丝体生长有较强的抑制作用。茄属植物在玉米中。在室内盆栽试验中，与对照相比，24 g ai/100 kg 种子的根系活性增加了 78.01%。同样，在该剂量下，叶绿素含量增加最为显着，增加了 32.3%。Thifluzamide (FS) 可以显着提高每块地的产量。在所考察的剂量中，48 g ai/100 kg 种子的处理效果最显着，2017 年和 2018 年的增产率分别比对照提高了 15.7% 和 14.1%。噻虫胺 (FS) 拌种剂在 48 g ai/100 kg 种子的剂量下对玉米条带纹枯病的田间效果最高。这些结果表明thifluzamide 具有控制玉米带状纹枯病的巨大潜力。