رشد وابسته به دما در کنه شکارگر Amblyseius swirskii (Acari: Phytoseiidae) با تغذیه از کنه تارتن دولکه‌ای Tetranychus urticae (Acari: Tetranychidae) روی گیاه توت‌فرنگی

The predator mite, Amblyseius swirskii Athias-Henriot is considered as a reliable and efficient general predator which feeds on many species of small arthropods and pollen can be used as a biocontrol agent against the two-spotted spider mite, Tetranychus urticae Koch which is one of the most important pests in greenhouses, farms, and gardens worldwide. In the present study, thermal requirements of this predator feeding on T. urticae on strawberry was described using two linear and eighteen non-linear thermodynamic models. Laboratory experiments were conducted at seven constant temperatures (15, 20, 25, 27.5, 30, 32.5 and 35°C), 70 ± 5% RH and a photoperiod of 16L: 8D h. The critical bioclimatic temperatures for pre-adult development of A. swirskii including thermal constant (k), lower temperature threshold (Tmin), optimum temperature (Topt), and upper temperature threshold (Tmax) was estimated. The statistical goodness of fit of models were assessed by different statistical indices such as R2, R2adj, SSE, AIC, AICC, and BIC. The lower temperature threshold, estimated by two linear models was 9.06°C. These models predicted values of k for pre-adult development as 109.14 DD (Ordinary linear model) and 110.55 DD (Ikemoto and Takai linear model), respectively. Our statistical and biological evaluations revealed that Janish-Rochat, Logan-6, Analytis-1, Briere-2, and Briere-1 were the best non-linear models for describing curvilinear development of A. swirskii. These models estimated the Topt and Tmax for pre-adult development as 30-32.5 and 36-38°C, respectively. Our findings could be so helpful for maximizing biological efficiency of this predatory mite at environmental conditions and shows this predatory mite as an effective biocontrol agent with good performance in warm weather conditions.