Effect of Prey Stages of the Two-Spotted Mite Tetranychus urticae on Functional Response of the Coccinellid Predator Stethorus gilvifrons

摘要: The effect of prey stages the two-spotted spider mite Tetranychus urticae on functional response coccinellid predator Stethorus gilvifrons was studied at 25±1 °C, 65±10% rh, and 16:8 h (L:D photoperiod). S. female, to increasing stage density from 10–100 preys per patch, curvilinear shape depicting Roger’s type II with highest consumption rate larval stage. Results maximum likelihood analyses confirmed this type. By plotting a model polynomial logistic regression numbers proportions consumed T. urticae, respectively, resulting lines fitted data well. However, composite waving form that appeared be decelerating (type II) low medium densities an accelerating III) high densities. We assume small size experimental arena or feeding behaviour may have induced modified response. A sensitivity analysis shows crucial predation rates by gilvifrons. Theoretically, based lowest handling time for mites could consume single female within 24 period were 77.42 larvae. These results improve our understanding interaction among urtica provide insights into control urticae.