On Wed, 1 Dec 2004 19:14:41 +0100, =?iso-8859-1?q?Herv=E9=20Log=E9?= < [log in to unmask]> wrote: >1. What are the stimuli that lead bees to cap larvae >cells ? The stimuli seems to be the brood pheromone -- 10 different esters (methyl and ethyl) of straight chain acids (palmitate, sterate, linolic, etc, cannot remember all five). the esters change in proportions as the larvae age (drones also have a different signature), so the workers exactly when to cap them. I donot know the answer to the RH question. Zach http://cyberbee.msu.edu :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::