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1 December 2001 Development and Survival of Tyrophagus putrescentiae (Acari: Acaridae) at Constant Temperatures
Ismael Sánchez-Ramos, Pedro Castañera
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The developmental rate and survival of immature stages of mold mite, Tyrophagus putrescentiae (Schrank), were examined at seven constant temperatures, ranging from 10 to 34°C, and a relative humidity of 90 ± 5%. The larval stage was particularly susceptible to low and high temperatures with 93.6 and 54% mortality at 10 and 34°C, respectively. The optimal temperature for development and survival appeared to be 30°C. Three nonlinear (Logan type III, Lactin, and Briere) models provided a reliable fit of the relationship between developmental rates and temperature (Ra2 > 0.93) for all immature stages. The upper threshold predicted by the three models were similar for all developmental stages, ranging from 35.5°C (larvae) to 37.4°C (eggs). In contrast, the lower threshold was greater using the Briere (8.8–10.5°C) model compared with the Logan type III and Lactin model for all stages. Both Lactin and Logan III predicted similar lower threshold, though it was lower for Logan III (4.4–7.3°C) for all stages, except for the larvae, where both models predicted the same temperature threshold (6.1°C). The low thermal variations of the environments where T. putrescentiae live have probably favored similar thermal threshold variations in the different immature stages. The potential of these models to predict the development of this mite is discussed.

Ismael Sánchez-Ramos and Pedro Castañera "Development and Survival of Tyrophagus putrescentiae (Acari: Acaridae) at Constant Temperatures," Environmental Entomology 30(6), 1082-1089, (1 December 2001).
Received: 1 January 2001; Accepted: 1 May 2001; Published: 1 December 2001

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