Bee Liners; I need to run field tests for hygienic behavior but will not have access to dry ice in the locations I will be working. I have not done these tests in several years and am curious to know if the pin prick method of killing sealed brood is considered valid? If so, how large a section of brood should be killed? Also, I used to pre-select by putting a piece of tissue paper in a hive and looked for the hives that took it out within 24 hours. Is this a useful and valid indicator? Bill Lord *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html