Effect of temperature on development of Orius strigicollis (Heteroptera: Anthocoridae) fed on Frankliniella occidentalis (Thysanoptera: Thripidae).

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  • Ohta Izumi
    Laboratory of Insect Pest Control, National Agricultural Research Center for Western Region, Japan

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The developments of Orius strigicollis eggs and nymphs reared on Frankliniella occidentalis were investigated at constant temperatures of 15, 20, 25, 30 and 33°C. Developmental times in the egg and nymphal stages decreased with increasing temperatures although the period of the egg stage at 33°C was almost equal to that at 30°C. The lower developmental thresholds and total effective temperatures were calculated as 11.5°C and 57.5 degree-days for eggs, 11.0°C and 158.7 degree-days for female nymphs, and 10.6°C and 166.7 degree-days for male nymphs, respectively. Hatchabilities were over 90% at 15–30°C, but 80.1% at 33°C. There was no significant difference in the survival rate at the nymphal stage among the temperatures tested. O. strigicollis developed from egg to adult at the same developmental rate as Orius sauteri and faster than Orius laevigatus.

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