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Reliable textbooks on tree pest, parasites, symptoms, and control measures include the following: Tree Maintenance, P. P. Pirone (Oxford University Press); Tree Care, John M. Haller (The Macmillan Co.); Insects and Diseases of Ornamental Trees and Shrubs, Ephraim Porter Felt and W. Howard Rankin (The Macmillan Co.); Diseases and Pests of Ornamental Plants (Third Edition), B. O. Dodge, H. W. Rickett, and P. P. Pirone (The Ronald Press Co.); The Wise Garden Encyclopedia, E. L. D. Seymour, ed. (William H. Wise& Co.). |
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