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<p><i>Phenacoccus solenopsis,</i> commonly known as the cotton mealybug, poses a serious threat to cotton production and a wide range of other crops worldwide. Current management strategies rely heavily on chemical insecticides; however, the pest rapidly develops resistance, demanding the search for alternative solutions. In this study, <i>Psoralea corylifolia</i> was investigated as a potential source of botanical insecticides. Total phenolic content (TPC) was determined from both callus and seed samples using different solvents and extraction conditions including Ultrasound-assisted extraction (UAE). Among the tested solvents, ethanol showed the highest extraction efficacy for phenolics, followed by methanol, whereas chloroform showed comparatively low recovery. UAE further enhanced phenolic extraction under optimized conditions. The higher phenolic recovery in ethanolic extracts may have contributed to the observed insecticidal activity against <i>P. solenopsis</i>. Bioassays revealed concentration-dependent toxicity of both callus and seed extracts against nymph and adult stages of the insect. No visible morphological changes were observed in leaves treated with callus extracts, whereas seed extracts caused visible leaf damage at higher concentrations. These findings suggest that callus-derived extract of <i>P. corylifolia</i> may offer a promising potential as a sustainable alternative source for management of <i>P. solenopsis.</i></p>

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Biopesticidal activity of callus extracts of Psoralea corylifolia L. on Phenacoccus solenopsis under laboratory conditions

  • 期刊论文

  • 发表日期：

    2026年7月6日

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  • Sarah Ali,
  • Saboohi Raza,
  • Muhammad Abdul Haq,
  • Beena Siddiqua,
  • Syed Muhammad Zain Hashmi

摘要

Phenacoccus solenopsis, commonly known as the cotton mealybug, poses a serious threat to cotton production and a wide range of other crops worldwide. Current management strategies rely heavily on chemical insecticides; however, the pest rapidly develops resistance, demanding the search for alternative solutions. In this study, Psoralea corylifolia was investigated as a potential source of botanical insecticides. Total phenolic content (TPC) was determined from both callus and seed samples using different solvents and extraction conditions including Ultrasound-assisted extraction (UAE). Among the tested solvents, ethanol showed the highest extraction efficacy for phenolics, followed by methanol, whereas chloroform showed comparatively low recovery. UAE further enhanced phenolic extraction under optimized conditions. The higher phenolic recovery in ethanolic extracts may have contributed to the observed insecticidal activity against P. solenopsis. Bioassays revealed concentration-dependent toxicity of both callus and seed extracts against nymph and adult stages of the insect. No visible morphological changes were observed in leaves treated with callus extracts, whereas seed extracts caused visible leaf damage at higher concentrations. These findings suggest that callus-derived extract of P. corylifolia may offer a promising potential as a sustainable alternative source for management of P. solenopsis.