Excerpt: The mass production of insects appears to have started with the requirements of the rod-and-line fisherman for bait. For many years, using crude but effective methods, an individual could earn a living rearing millions of blowflies a week to meet this demand. The recent rise of the insecticide industry- and now, biological control--has meant an ever-increasing demand for many insect species. Not only does the testing of insecticides demand very large numbers of standard insects, but their release, either as parasites to control an economic pest, or as sterile males to 'use up' wild females, involves the laboratory production of millions of specimens per week.
Gardiner, Brian O.C
"Insect Colonization and Mass Production. Edited by Carroll N. Smith. New York and London: Academic Press, 1966. xxii, 618pp. $27.00.,"
The Great Lakes Entomologist, vol 1
Available at: https://scholar.valpo.edu/tgle/vol1/iss8/8