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Preprint reveals cypermethrin resistance and recovery phenotype in Alphitobius diaperinus from Colombia, suggesting emerging pest management challenges.
This preprint reports the first evidence of cypermethrin resistance in Alphitobius diaperinus from Colombia. A field-collected population from Caloto, Cauca, exhibited 100% knockdown at 4 h across all concentrations tested (5–25µg a.i./cm²) but showed ≤6% mortality at 72 h and complete recovery of locomotor activity. Recovery assays after 4-h exposure confirmed 100% survival. This represents a novel complete knockdown recovery phenotype. Resistance ratios could not be calculated because the susceptible reference population is under establishment; full statistical analyses are reserved for the final article. Raw data are available in a companion dataset (see Related identifiers).
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Rios et al. (2026) studied this question.
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