Tetranychus evansi Baker & Pritchard (Acari: Tetranychidae) is an invasive tomato pest in several African, American, Asian and European countries, with potential to reduce yield by up to 90%. Populations of the predaceous phytoseiid mite Phytoseiulus longipes Evans (Acari: Phytoseiidae) has been reported to have high potential for controlling T. evansi. However, tomato genotypes can potentially affect the performance of T. evansi and the predation ability of P. longipes. We evaluated the performance and predation capacity of P. longipes feeding on T. evansi nymphs on the two cultivated genotypes widely grown in Western Africa and a breeding genotype. The two commercial evaluated genotypes were Tounvi (susceptible, with few trichomes), TLCV15 (susceptible, with many trichomes), and the breeding genotype was SPJ-05–2018 (partially resistant with many glandular trichomes) selected from interspecific crossing TLCV15 and PI 13447 (highly resistant wild tomato genotype). We hypothesized that the susceptible genotype (with fewer trichomes) would be more favorable for P. longipes when compared to the susceptible or partially resistant genotypes (with a higher numbers of non-glandular or glandular trichomes). Intrinsic rate of increase (r) and predation potential (ω) of P. longipes were significantly reduced on SPJ-05–2018, possibly due to a negative effect of its glandular trichomes. Although the intrinsic rate of increase was higher on both susceptible genotypes (TLCV15 and Tounvi), predation potential was higher on TLCV15. Our results refuted the hypothesis that T. evansi-susceptible genotype with fewer trichomes would be more favorable to P. longipes.

Tetranychus evansi Baker & Pritchard (Acari: Tetranychidae) 是一种在非洲、美洲、亚洲和欧洲国家的入侵番茄害虫，有可能使产量减少高达 90%。据报道，掠食性植物螨类Phytoseiulus longipes Evans (Acari: Phytoseiidae) 的种群具有控制Evansi 的潜力。然而，番茄基因型可能会影响T. evansi的性能和P. longipes的捕食能力。我们评估了以T. evansi为食的P. longipes的性能和捕食能力若虫在西非广泛种植的两种栽培基因型和一种育种基因型上。两个商业评估的基因型是Tounvi（易感，很少毛状体），TLCV15（易感，有很多毛状体），育种基因型是SPJ-05-2018（部分抗性，有很多腺毛）选自TLCV15和PI 13447的种间杂交（高度抗性野生番茄基因型）。我们假设，与易感或部分抗性基因型（具有更多数量的非腺体或腺体毛状体）相比，易感基因型（具有较少的毛状体）对长叶假单胞菌更有利。P. longipes 的内在增长率 ( r ) 和捕食潜力 (ω)在 SPJ-05-2018 上显着减少，可能是由于其腺毛的负面影响。尽管两种易感基因型（TLCV15 和 Tounvi）的内在增长率更高，但 TLCV15 的捕食潜力更高。我们的结果驳斥了具有较少毛状体的T. evansi易感基因型对P. longipes更有利的假设。