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<p>Greenhouse whitefly (<i>Trialeurodes vaporariorum</i>) is a&#xa0;serious pest of protected crops worldwide, and its increasing resistance to chemical insecticides has intensified the search for eco-friendly alternatives. Although <i>Bacillus</i> species are recognized for their biocontrol potential, limited information exists on the role of indigenous <i>Bacillus paramycoides</i> in managing <i>T.&#xa0;vaporariorum</i>. The present study aims to evaluate the biocontrol potential of native <i>B.&#xa0;paramycoides</i> isolates as microbial biopesticides under controlled conditions. A&#xa0;study was conducted to isolate and select indigenous bacteria based on their production of ammonia, amylase, and protease from rhizospheric soil samples associated with diverse vegetation from six different districts in Himachal Pradesh, India. The screened isolate EU-SIRCK1266, which was positive for all attributes, was molecularly characterized as <i>B.&#xa0;paramycoides</i> and further tested for its virulence against greenhouse whitefly on tomato over two consecutive years (2022–2023). The overall percent reduction in the year 2022 for the adult whiteflies population was recorded as 58.50 ± 14.00, and for the nymph population as 56.14 ± 11.78 over control. The overall percent reduction in the year 2023 for the adult whiteflies population was observed as 56.47 ± 1.94, and for the nymph population was 56.85 ± 2.63 over the control. In both years, growth parameters, yield, and physiological parameters were increased in treated plants in comparison to controls. This study suggests <i>B.&#xa0;paramycoides</i> as an effective biocontrol agent against <i>T.&#xa0;vaporariorum</i> and with positive indication for the synthesis of ammonia and hydrolytic enzymes (amylase and protease). The findings provide novel evidence of <i>B.&#xa0;paramycoides</i> activity against <i>T.&#xa0;vaporariorum</i>, offering a&#xa0;sustainable and environmentally safe alternative for integrated pest management (IPM) in greenhouse ecosystems. Furthermore, studies are needed to understand the mechanisms related to biocontrol and plant growth promotion attributes.</p>

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Exploring the Biopesticidal Potential of Indigenous Bacillus paramycoides EU-SIRCK1266 for Sustainable Management of Greenhouse Whiteflies Trialeurodes vaporariorum

  • 期刊论文

  • 发表日期：

    2026年1月20日

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  • Simranjeet Kaur,
  • Neelam Thakur,
  • Ajar Nath Yadav

摘要

Greenhouse whitefly (Trialeurodes vaporariorum) is a serious pest of protected crops worldwide, and its increasing resistance to chemical insecticides has intensified the search for eco-friendly alternatives. Although Bacillus species are recognized for their biocontrol potential, limited information exists on the role of indigenous Bacillus paramycoides in managing T. vaporariorum. The present study aims to evaluate the biocontrol potential of native B. paramycoides isolates as microbial biopesticides under controlled conditions. A study was conducted to isolate and select indigenous bacteria based on their production of ammonia, amylase, and protease from rhizospheric soil samples associated with diverse vegetation from six different districts in Himachal Pradesh, India. The screened isolate EU-SIRCK1266, which was positive for all attributes, was molecularly characterized as B. paramycoides and further tested for its virulence against greenhouse whitefly on tomato over two consecutive years (2022–2023). The overall percent reduction in the year 2022 for the adult whiteflies population was recorded as 58.50 ± 14.00, and for the nymph population as 56.14 ± 11.78 over control. The overall percent reduction in the year 2023 for the adult whiteflies population was observed as 56.47 ± 1.94, and for the nymph population was 56.85 ± 2.63 over the control. In both years, growth parameters, yield, and physiological parameters were increased in treated plants in comparison to controls. This study suggests B. paramycoides as an effective biocontrol agent against T. vaporariorum and with positive indication for the synthesis of ammonia and hydrolytic enzymes (amylase and protease). The findings provide novel evidence of B. paramycoides activity against T. vaporariorum, offering a sustainable and environmentally safe alternative for integrated pest management (IPM) in greenhouse ecosystems. Furthermore, studies are needed to understand the mechanisms related to biocontrol and plant growth promotion attributes.