He published more than 200 scientific papers and edited and contributed to books "citation classics" in population ecology, biological control, and integrated pest management. Examples are Theory and Practice of Biological Control (1976) and Ecological Entomology (1984). He also conducted a notable experiment on predator–prey population dynamics in mites in 1958.[2]
He was awarded the Louis E. Levy Medal in 1976.
In 1994 he was awarded the Wolf Prize in Agriculture along with Perry L. Adkisson “for their contributions to the development and implementation of environmentally beneficial integrated pest management systems for the protection of agricultural crops”.