Grafton-Cardwell, E. E., J. G. Morse, N. V. O'Connell, P. A. Phillips, C. E. Kallsen, and D. R. Haviland, 2003. UC IPM Pest Management Guidelines: Citrus. ANR Publication 3441. http://www.ipm.ucdavis.edu/PMG/selectnewpest.citrus.html Haviland, D. R. and N. J. Sakovitch.