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Population growth rates of Tetranychus evansi and Tetranychus urticae on intact tomato plants. Shown are mean densities (+ SEM, n = 4) of adult female T. evansi (closed symbols) and T. urticae (open symbols) until the plants were overexploited. Through time, the densities of T. evansi were significantly higher than those of T. urticae (linear mixed effects model, χ2 = 116.7, d.f. = 1, P < 0.0001).
