The bookworm, while not generally a worm or even a specific species, is a real pest[1]. Pest control is an important part of any library science preservation cl

The bookworm, while not generally a worm or even a specific species, is a real pest[1]. Pest control is an important part of any library science preservation class[2] The fact that borders are chosen as the... borders... to attempt to control the spread of disease is not by accident; It's just logical. Especially in the turn-of-the-century sea voyages, where pests spread readily between passengers. There are other borders in use, see the Apple Maggot Quarantine area[3] Yes, Zyklon B was used (and is still used regularly[4]. It's a simple to produce and simple to dispose of, breaking down naturally in a few months. For all the horrors associated with it, you can say the same of many other chemicals that have important industrial and agricultural uses. It would have been stupid to ban Ammonium nitrate after the Oklahoma City Bombing[5], because it's used in practically every crop field in america. [1] https://en.wikipedia.org/wiki/Bookworm_(insect) https://en.wikipedia.org/wiki/Bookworm_(insect) [2] https://guides.lib.uw.edu/c.php?g=342245&p=2305086 https://guides.lib.uw.edu/c.php?g=342245&p=2305086 [3] https://agr.wa.gov/departments/insects-pests-and-weeds/insects/apple-maggot/quarantine https://agr.wa.gov/departments/insects-pests-and-weeds/insec... [4] https://www.redding.com/story/opinion/columnists/2018/01/08/epa-keeps-nazi-nerve-gas-pesticide-use-californias-fields/1009271001/ https://www.redding.com/story/opinion/columnists/2018/01/08/... [5] https://en.wikipedia.org/wiki/Oklahoma_City_bombing#Building_the_bomb https://en.wikipedia.org/wiki/Oklahoma_City_bombing#Building...