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<p>The two-spotted spider mite, <i>Tetranychus urticae</i>, is a significant pest of cucumber crops, particularly under polyhouse conditions. Effective management strategies are essential for maintaining crop yield and health. Therefore, the efficacy of anthocorid bug, <i>Blaptostethus pallescens</i> and predatory mite, <i>Neoseiulus longispinosus</i> were evaluated along with Spiromesifen 45 SC against the two-spotted spider mite on cucumber. It involved comparing the impact of Spiromesifen 45 SC, <i>N. longispinosus</i> at two predator-to-prey ratios (1:20 and 1:30) and <i>B. pallescens</i> at two different densities (10 and 20 nymphs per meter row) on <i>T. urticae</i>. Assessments were made on mite counts and fruit yields over two growing seasons (2020 and 2021). The study revealed that the minimum count of spider mite was recorded with Spiromesifen 45 SC which differed statistically with other treatments. The next best treatment was <i>N. longispinosus</i> (1:20 predator: prey), followed by <i>N. longispinosus</i> (1:30 predator: prey), <i>B. pallescens</i> (20 nymphs/m row) and <i>B. pallescens</i> (10 nymphs/m row) Besides the use of insecticide, <i>N. longispinosus</i> (1:20 predator: prey) can be used as one of the components of Integrated Pest Management Programme for the management of red spider mite, <i>T. urticae</i> infesting cucumber under polyhouse conditions. The correlation studies on population of mite, <i>T. urticae</i> with weather parameters concluded a significant positive correlation with maximum, minimum and average temperature while, significant negative correlation with morning, evening and average relative humidity. The study concludes that both <i>B. pallescens</i> and <i>N. longispinosus</i> has great potential in managing <i>T. urticae</i> and it can be used to control mite population.</p>

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Management of Tetranychus urticae Koch (Acari: Tetranychidae) on cucumber using Blaptostethus pallescens poppius (Hemiptera: Anthocoridae) and Neoseiulus longispinosus (Evans) (Acari: Phytoseiidae) under polyhouse conditions

  • 期刊论文

  • 发表日期：

    2025年2月26日

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  • Subhash Chander Verma,
  • Prem Lal Sharma,
  • Vishav Gaurav Singh Chandel,
  • Rajeshwar Singh Chandel,
  • Nidhi Sharma,
  • Priyanka Sharma,
  • Nikita Chauhan,
  • Chander Singh

摘要

The two-spotted spider mite, Tetranychus urticae, is a significant pest of cucumber crops, particularly under polyhouse conditions. Effective management strategies are essential for maintaining crop yield and health. Therefore, the efficacy of anthocorid bug, Blaptostethus pallescens and predatory mite, Neoseiulus longispinosus were evaluated along with Spiromesifen 45 SC against the two-spotted spider mite on cucumber. It involved comparing the impact of Spiromesifen 45 SC, N. longispinosus at two predator-to-prey ratios (1:20 and 1:30) and B. pallescens at two different densities (10 and 20 nymphs per meter row) on T. urticae. Assessments were made on mite counts and fruit yields over two growing seasons (2020 and 2021). The study revealed that the minimum count of spider mite was recorded with Spiromesifen 45 SC which differed statistically with other treatments. The next best treatment was N. longispinosus (1:20 predator: prey), followed by N. longispinosus (1:30 predator: prey), B. pallescens (20 nymphs/m row) and B. pallescens (10 nymphs/m row) Besides the use of insecticide, N. longispinosus (1:20 predator: prey) can be used as one of the components of Integrated Pest Management Programme for the management of red spider mite, T. urticae infesting cucumber under polyhouse conditions. The correlation studies on population of mite, T. urticae with weather parameters concluded a significant positive correlation with maximum, minimum and average temperature while, significant negative correlation with morning, evening and average relative humidity. The study concludes that both B. pallescens and N. longispinosus has great potential in managing T. urticae and it can be used to control mite population.