Infection frequencies of the endosymbiont Wolbachia infesting each of the host plants, namely, tomato, soybean, and corn, in natural populations of the spider mite Tetranychus truncatus. Infection rates of 48 spider mites from corn, 54 spider mites from tomato, and 46 spider mites from soybean were analyzed. Error bars indicate 95% confidence intervals. Different lowercase letters indicate significant differences (P < 0.05).