18 



diet plugs and maintained at a temperature of 31.1 ± 0.9° C and an RH of 

 55 ± 5% with 20 hr of light and 4 hr of darkness was measured for two 36-week 

 periods. The data from the 2 periods did not agree, but they did indicate a 

 seasonal fluctuation on weevil oviposition though the magnitude of this effect 

 could not be determined. 



29. Baker, D. N.. and Lloyd, E. P. 1970. Effect of age on respiration and 

 transpiration in the boll weevil, Anthonomus grandis . Ann. Entoraol. Soc. 

 Am. 63: 100-104. 



Respiration and transpiration rates in A. grandis Boheman were measured with 

 an open-system technique. Windspeed and humidity had no effect on respiration 

 rate. There was an increase in metabolic activity, as indicated by the respira- 

 tion rate, with age at temperatures above 35°C. The thermal death point in the 

 boll weevil was fixed at 54 ± Z^C. There was a slight (2.5°C) increase with 

 age in the thermal death point from 2 to 12 days. Indirect evidence of a 

 spiracular response to high potential transpiration rates was obtained. There 

 appears to be no systematic change in transpiration rate with age in the boll 

 weevil. 



30. , and Lloyd, E. P. 1970. An en£«gy balance for the boll weevil, 

 ^^=^ A nthcncTnus grandis . Ann. Entomol. Soc. Am. 63: 104-107. 



Respiration and transpiration by lots of 100 Anthonomus grandis Boheman (Coleop- 

 tera: Curculionidae) , were measured in an open system under artificial lights 

 at 3 levels (1.195, 0.530, and calories per centimeter squared per minute) 

 and at a wind speed of 134 centimeters per second. Using these data a table 

 was constructed showing the relative magnitudes of the various cleihents of the 

 energy budget for the insects. It was necessary to evaluate the reflectance 

 and the thermal emissivity of the weevil; t>.ey were found to be 10.5% and 0.97%, 

 respectively. It was found that the sum is by far the insect's greatest energy 



■^ 



:^ 



