Yes, this trial is North American wide. It has two parts: 1. Screen bottom efficacy improvement in Canada and parts of the USA where there are no beetle. 2. SHB repellent - mostly the southern states and with two versions - with or without screen bottoms. As this trial will require a lot of work it may be of advantage for each participant to handle just 4 - 6 hives and be part of an assigned "group". :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::