Caprile, J.L., Varela, L.G., Pickel, C., Coates, W.W., Bentley, W.J., & Vossen, P.M. 2000 Pests of apple.. UC Pest Management Guidelines

Notes: [http://www.ipm.ucdavis.edu/PMG/selectnewpest.apples.html] This update to the University of California IPM Pest Management Guidelines contains descriptions and control recommendations for insects, arthropod and nematode diseases of apple in the U.S., including Epidiaspis leperii and Quadraspidiotus perniciosus.