Scientists mapped the complete genome of Tetranychus evansi — an invasive spider mite destroying tomatoes, peppers, and eggplant worldwide — and built CRISPR gene-editing tools to identify exactly which mutations make it resistant to common pesticides. A single gene change causes up to 645-fold resistance to certain insecticides, giving researchers a precise target for next-generation controls.
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The 89 Mb genome was assembled into just 13 contigs with 14,246 genes identified — a high-quality reference revealing T. evansi has fewer detoxification genes than its generalist relative, suggesting specialization on solanaceous plants
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A single mutation (M918T) in the voltage-gated sodium channel confers 345–645× resistance to bifenthrin, confirming it as the primary driver of pyrethroid pesticide resistance in field populations
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CRISPR/Cas9 gene editing was successfully adapted for this mite species with ~10–15% knockout efficiency, establishing it as a workable model for studying how pests evolve pesticide resistance
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