The Effect of Rearing Temperature on Flight Initiation of Trichogramma sibericum Sorkina at Ambient Temperatures |
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Authors: | Rene Priya Prasad Bernard D Roitberg Deborah Henderson |
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Institution: | a Centre for Pest Management, Simon Fraser University, Burnaby, British Columbia, Canada, V5A 1S6;b E. S. Cropconsult Ltd. 3041 West 33rd Avenue, Vancouver, British Columbia, Canada, V6N 2G6 |
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Abstract: | Trichogramma sibericum Sorkina was reared in the laboratory at three temperatures: 16, 21, and 26°C. Individuals from each of these treatments were then tested for propensity to initiate flight at one of four ambient temperatures: 16, 19, 21, or 26°C. Both rearing and ambient temperatures had significant effects on flight initiation. Insects reared at 16°C had the highest mean proportion of flyers; insects reared at 26°C had the lowest. The proportion of insects initiating flight increased with increasing ambient temperature. Also, the interaction of these two temperature experiences was significant. Insects reared at 16°C were more likely to initiate flight at 16°C than insects reared at 21 or 26°C. These results indicate that performance (as assessed by flight initiation) at ambient temperature is dependent on the temperature previously experienced during rearing. |
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Keywords: | Trichogramma sibericum flight initiation temperature biological control quality control acclimation |
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