Scholarlink

<p>Northern leaf blight (NLB) caused by <i>Exserohilum turcicum</i> is a devastating foliar disease of maize. Deploying resistant varieties is considered a sustainable and eco-friendly option for long-term agriculture sustainability. However, challenges arise with the durability of host resistance, prompting the need for integrated approaches. While NLB management in Nepal involves the use of traditional fungicides, our study focuses on evaluating the efficacy of newly registered fungicides concerning’ disease control and post-harvest seed infestation levels in the inner Terai region of Nepal. Altogether four chemical fungicides, two commonly used (Mancozate and SAAF) and two newly registered (Tilt, and Nativo) were evaluated under in vitro (Poisoned food technique) and field conditions (Randomized complete block design). Tilt and Nativo at 50&#xa0;ppm were found strikingly effective in completely inhibiting the fungal pathogen’s mycelial growth. Also under field conditions, the treatment (Seed treatment with carbestin-50 + Foliar application of Tilt (0.1%) showed the lowest disease incidence (81.95%), percent disease index (PDI) (33.37%), sporulation (0.52 × 10<sup>4</sup>&#xa0;spores/ml), AUDPC (1316.98) with highest yield (4.39&#xa0;t/ha) which was at par with Nativo (0.05%). These results revealed that Tilt or Nativo could be applied in knee high or before the tasseling stage and can also be used alternatively to overcome fungicide resistance issues. No incidence of <i>E. turcicum</i> was detected in any treatment using the freezing blotter technique, indicating either very low natural seed infection or limitations in detection sensitivity.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Evaluation of newly registered fungicides for controlling northern leaf blight of maize in inner Terai of Nepal

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月9日

查看全文
  • Shishir Sharma,
  • Sundar Man Shrestha,
  • Hira Kaji Manandhar,
  • Ritesh Kumar Yadav,
  • Suk Bahadur Gurung,
  • Bibek Phulara,
  • Laxmi Prasad Joshi

摘要

Northern leaf blight (NLB) caused by Exserohilum turcicum is a devastating foliar disease of maize. Deploying resistant varieties is considered a sustainable and eco-friendly option for long-term agriculture sustainability. However, challenges arise with the durability of host resistance, prompting the need for integrated approaches. While NLB management in Nepal involves the use of traditional fungicides, our study focuses on evaluating the efficacy of newly registered fungicides concerning’ disease control and post-harvest seed infestation levels in the inner Terai region of Nepal. Altogether four chemical fungicides, two commonly used (Mancozate and SAAF) and two newly registered (Tilt, and Nativo) were evaluated under in vitro (Poisoned food technique) and field conditions (Randomized complete block design). Tilt and Nativo at 50 ppm were found strikingly effective in completely inhibiting the fungal pathogen’s mycelial growth. Also under field conditions, the treatment (Seed treatment with carbestin-50 + Foliar application of Tilt (0.1%) showed the lowest disease incidence (81.95%), percent disease index (PDI) (33.37%), sporulation (0.52 × 104 spores/ml), AUDPC (1316.98) with highest yield (4.39 t/ha) which was at par with Nativo (0.05%). These results revealed that Tilt or Nativo could be applied in knee high or before the tasseling stage and can also be used alternatively to overcome fungicide resistance issues. No incidence of E. turcicum was detected in any treatment using the freezing blotter technique, indicating either very low natural seed infection or limitations in detection sensitivity.