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For a Chats in the Stacks book talk at Mann Library in November 2018, Ann E. Hajek, professor in the Department of Entomology at Cornell University, presented her new book, Natural Enemies: An Introduction to Biological Control Cambridge University Press, 2nd edition Sept. 2018 co-authored with Jørgen Eilenberg of the University of Copanhagen, Denmark.

Hajek discussed the wide diversity of organisms used in the control of pests, weeds and plant pathogens, and the strategies referred to as 'biological control.' These controls include the use of exotic natural enemies, the application of predators, parasitoids, and microorganisms as biopesticides, and the manipulation of the environment to enhance natural enemy populations. She also reviews recent changes that have made biological control safe for the environment, and how these methods can aid sustainability efforts.