Labeling of individual plants is a critical component of many types of plant and agricultural research and is essential for success in breeding and development of new crop cultivars (Layne, 1983). Many types of tags have been used for woody tree species, including wood, plastic, metal, and paint, but all have faults that limit their use and useful life. Implantation of radiofrequency identification device (RFID) microchips is widely used for labeling of pets and livestock and in many types of work with wildlife and domestic animals (Buguk et al., 1998; Caceci et al., 1999; Sorenson et al., 1995). The technology is also known as radiofrequency passive integrated transponder tags (Gibbons and Andrews, 2007), and a similar technology based on ultrasound rather than radiofrequency has been developed for aquaculture research (Holm et al., 2007). We previously reported on the use of RFID microchips to label young citrus trees and their potential for long-term identification of woody trees in research (Bowman, 2005). The objective of this study was to evaluate the durability of microchips implanted in citrus trees for 6 years and to assess their potential effect on tree health and growth.
Buguk, C., Ervin, R.T. & Eberspacher, J. 1998 Economic analysis of an alternative cattle identification system used to decrease hide damage J. Amer. Leather Chemists Assoc. 93 248 254
Caceci, T., Smith, S.A., Toth, T.E., Duncan, R.B. & Walker, S.C. 1999 Identification of individual prawns with implanted microchip transponders Aquaculture 180 41 51
Holm, S., Brungot, J., Ronnekleiv, A., Hoff, L., Jahr, V. & Kjolerbakken, K.M. 2007 Acoustic passive integrated transponders for fish tagging and identification Aquacult. Eng. 36 122 126
Sorenson, M.A., Buss, M.S. & Tyler, J.W. 1995 Accuracy of microchip identification in dogs and cats J. Amer. Veterninary Medical Assoc. 207 766 767