Document Type


Publication Date



Brachycentrus; Larvae--Effect of temperature on


Wild-collected Brachycentrus americanus larvae were subjected to thermal shocks of 30-minute and 60-minute duration in June, September, and December of 1976. Temperatures at collection were 14.7 , 10.4 , and 1.2 C, respectively. The TL50's for both 30-minute and 60-minute shock durations ranged from 33.3 C to 34.0 C for each month, except for a 30-minute exposure in September, which had a TL 50 of 34.6 C. Larvae from a December exposure were held for 16 days to observe postexposure behavior. Feeding was reduced 50 percent among specimens exposed to temperatures 1.2 C below the 30-minute TL 50 and 3.6 C below the 60-minute TL50.

First Page


Last Page


Primo Type


Included in

Entomology Commons



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.