4.4.5. Sample collection cards
FTA™ collection cards (Whatman) preserve tissues both by desiccation and chemical (salt) preservatives embedded in the filter paper (Becker et al., 2004; Rensen et al., 2005). They are ideal for soft tissues and for remote collecting situations where sample weight and ambient storage are important factors. They are very reliable, but pricey, only suitable for small sample sizes and processing can be messy. See the BEEBOOK paper on molecular methods (Evans et al., 2013).