Warren T. Johnson (1) (1925–1994)

[excerpt from Cornell University online memorial]
Dr. Johnson was the author or co-author of more than 75 publications on arthropods affecting woody ornamental
plants and their control. His early interests were with insects affecting nut trees; later he worked on strategies for
controlling the forest tent caterpillar, scale insects, and many others; and he ended his career with much work on
the use of horticultural oils and growing degree days for pest management. He co-authored and revised yearly the
Cornell Recommendations for Maintenance of Trees and Shrubs.