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<p>Long-term and intensive use of synthetic insecticides tends to alter the ecological balance and cause pest resistance. As increasing focus has been laid on using environmentally conscious pest management strategies, the present study was conducted to determine the effectiveness and ecological safety of a novel bio-insecticide preparation, Biomagic WP, as a safer alternative in the control of cocoa mirids. Positive and negative controls were Pyrinex 48EC (chlorpyrifos-based organophosphate insecticide) and distilled water, respectively. Data analysis includes descriptive statistics, ANOVA, DMRT, and Pearson correlation. Laboratory bioassay results showed that for direct contact toxicity, both 2.0% and 1.0% concentrations achieved 100% mortality in 4&#xa0;min, 0.5% achieved 100% mortality in 5&#xa0;min, while it took 530&#xa0;min for indirect contact toxicity. For the antifeedant test, the Biomagic WP-treated pods had an average of 8 lesions as compared to 17 and 93 lesions for the positive and negative controls, respectively. Field trial on small-scale levels indicated 100% reduction of pod infection in 105 days in Biomagic WP and 56 days in the positive control. Analysis showed that there was no remarkable difference between Biomagic WP and the standard chemical control. Residual analysis of cocoa beans showed that no traces of active ingredients of Biomagic WP were detected. Biomagic WP is an effective and environmentally friendly substitute for conventional insecticides, which enhance ecological balance and sustainable pest control in cocoa agro-ecosystems.</p>

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Efficacy of an entomopathogenic bio-insecticide formulation (BioMagic WP; Metarhizium anisopliae) against the brown cocoa mirid, Sahlbergella singularis (Hagl., 1895) (Hemiptera: Miridae), in Nigeria

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  • 发表日期：

    2026年7月4日

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  • Omolara O. Awe,
  • Adebowale D. Dada,
  • Abubakar A. Muhammad,
  • Oluwaseun T. Omoboriowo

摘要

Long-term and intensive use of synthetic insecticides tends to alter the ecological balance and cause pest resistance. As increasing focus has been laid on using environmentally conscious pest management strategies, the present study was conducted to determine the effectiveness and ecological safety of a novel bio-insecticide preparation, Biomagic WP, as a safer alternative in the control of cocoa mirids. Positive and negative controls were Pyrinex 48EC (chlorpyrifos-based organophosphate insecticide) and distilled water, respectively. Data analysis includes descriptive statistics, ANOVA, DMRT, and Pearson correlation. Laboratory bioassay results showed that for direct contact toxicity, both 2.0% and 1.0% concentrations achieved 100% mortality in 4 min, 0.5% achieved 100% mortality in 5 min, while it took 530 min for indirect contact toxicity. For the antifeedant test, the Biomagic WP-treated pods had an average of 8 lesions as compared to 17 and 93 lesions for the positive and negative controls, respectively. Field trial on small-scale levels indicated 100% reduction of pod infection in 105 days in Biomagic WP and 56 days in the positive control. Analysis showed that there was no remarkable difference between Biomagic WP and the standard chemical control. Residual analysis of cocoa beans showed that no traces of active ingredients of Biomagic WP were detected. Biomagic WP is an effective and environmentally friendly substitute for conventional insecticides, which enhance ecological balance and sustainable pest control in cocoa agro-ecosystems.