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<p>Floating bed cultivation is an innovative approach to ensure food and nutritional security in flood-prone and waterlogged regions. Among suitable crops, okra has the capacity to flourish in this system; however, its productivity is often threatened by insect pests such as <i>Amrasca biguttula biguttula</i> (Hemiptera: Cicadellidae; jassid) and <i>Earias vitella </i>(Lepidoptera: Nolidae; shoot and fruit borer). This study represents the first multi-year field evaluation of commercially available biopesticides as sustainable alternative to synthetic pesticides for pest management in floating bed okra production. Over three consecutive years (2021–2023), multilocation trials were conducted using four treatment&#xa0;(T) combinations. The most effective treatments were T1, which involved sequential applications of D‑limonene (Bio clean®) followed by two sprays of spinosad (Success®) and T3, which used sodium lauryl ether sulfate (Fizimite®) followed by two sprays of Success®. Both treatments, T1 and T3, significantly reduced <i>A.&#xa0;biguttula</i> populations, with mean densities of 2.8 to&#xa0;2.9 per leaf compared to 11.7 in the control. Similarly, shoot and fruit infestation by <i>E.&#xa0;vitella</i> were declined to 1.3&#xa0;to 3.1% and 2.9&#xa0;to 4.2%, respectively, whereas control beds recorded 14.5% shoots and 16.6% fruits infestations. These treatments (T1 and T3) also enhanced okra yield by 31.4–50.8% over the control and achieved superior benefit-cost ratios (≈8.0), indicating strong economic feasibility. The results obtained from this field evaluation demonstrated that sequential application of selected biopesticides provides an effective, eco-friendly, economically viable alternative to synthetic pesticides for managing key insect pests in aquatic farming systems for okra production, thereby safeguarding both productivity and environmental sustainability.</p>

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Biopesticide Strategies for Managing Amrasca biguttula biguttula I. and Earias vitella F. in Floating Bed Okra (Abelmoschus esculentus L.) Cultivation

  • 期刊论文

  • 发表日期：

    2026年3月31日

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  • M. Mahbubur Rahman,
  • Alimur Rahman,
  • Mostafizur Rahman Talukder,
  • Md Nuruzzaman,
  • Ahsanul Haque,
  • Sumaiya Akter,
  • Haoliang Chen

摘要

Floating bed cultivation is an innovative approach to ensure food and nutritional security in flood-prone and waterlogged regions. Among suitable crops, okra has the capacity to flourish in this system; however, its productivity is often threatened by insect pests such as Amrasca biguttula biguttula (Hemiptera: Cicadellidae; jassid) and Earias vitella (Lepidoptera: Nolidae; shoot and fruit borer). This study represents the first multi-year field evaluation of commercially available biopesticides as sustainable alternative to synthetic pesticides for pest management in floating bed okra production. Over three consecutive years (2021–2023), multilocation trials were conducted using four treatment (T) combinations. The most effective treatments were T1, which involved sequential applications of D‑limonene (Bio clean®) followed by two sprays of spinosad (Success®) and T3, which used sodium lauryl ether sulfate (Fizimite®) followed by two sprays of Success®. Both treatments, T1 and T3, significantly reduced A. biguttula populations, with mean densities of 2.8 to 2.9 per leaf compared to 11.7 in the control. Similarly, shoot and fruit infestation by E. vitella were declined to 1.3 to 3.1% and 2.9 to 4.2%, respectively, whereas control beds recorded 14.5% shoots and 16.6% fruits infestations. These treatments (T1 and T3) also enhanced okra yield by 31.4–50.8% over the control and achieved superior benefit-cost ratios (≈8.0), indicating strong economic feasibility. The results obtained from this field evaluation demonstrated that sequential application of selected biopesticides provides an effective, eco-friendly, economically viable alternative to synthetic pesticides for managing key insect pests in aquatic farming systems for okra production, thereby safeguarding both productivity and environmental sustainability.