数字农科院2.0

BioControl 3.0: Biological Control Complex for Pest Control—Enhanced Control of Locusta migratoria manilensis via Combined Application of Metarhizium anisopliae var. acridum and Carabus smaragdinus

文献类型： 外文期刊

作者： Linqiang Gao;Yan Wang;Ruxin Wang;Jinshu Yang;Meiyi Yang;Yusheng Liu;Guangjun Wang;Mark R. McNeill;Zehua Zhang;Xinghu Qin;Haiyan Wang

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关键词： additive effect;biological control;locusts;predator-pathogen complex

期刊名称： Animals

ISSN：

年卷期： 2026 年 16 卷 2 期

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收录情况： SCIE（2025版）

摘要： Locusta migratoria manilensis (Meyen) is a highly destructive insect pest worldwide. However, excessive reliance on insecticides has resulted in significant environmental pollution. Biocontrol complexes combine two or more BCAs to address the limitations of individual agents. However, biocontrol complex for locust control has been rarely reported. Here, we propose BioControl 3.0, which integrates Metarhizium anisopliae var. acridum (Driver and Milner) and Carabus smaragdinus (Fischer von Waldheim) for locust control. We evaluated this system through a series of laboratory bioassays and semi-field cage experiments, comparing single-agent applications, sequential combinations (BioControl 2.0), and predator-mediated delivery (BioControl 3.0), and quantified locust mortality and interaction effects between predation and infection We found that M. anisopliae caused >85% mortality of locust nymphs at 1 × 108 conidia/mL (LT50 ≈ 6 days) while exhibiting negligible virulence toward C. smaragdinus. BioControl 2.0 (sequential application) increased mortality compared to single agents. However, this approach revealed a significant negative interaction between predation and infection, which limited the total control efficacy. BioControl 3.0 (predator-vectored fungus) achieved the highest corrected mortality, with predation and infection acting independently and additively (no detectable antagonistic interaction). By leveraging a predatory vector, BioControl 3.0 decouples negative interaction and harnesses dual biotic pressures, offering a cost-effective, environmentally benign alternative to conventional locust control. Our findings provide a blueprint for designing integrated predator-pathogen complexes and optimizing deployment strategies for sustainable management of locust outbreaks.

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