An entomologist-explorer who traveled to South America in search of a predator for the cottony cushion scale that threatened California citrus. He returned in 1888 with the vedalia beetle, a successful example of biotic control – the control of pests through the introduction of a predator of that pest, rather than through chemical means.
The timeline below shows where the character Alfred Koebele appears in Silent Spring. The colored dots and icons indicate which themes are associated with that appearance.
Chapter 17: The Other Road
...control involving imported predators or parasites. Beginning with the vedalia beetles brought to California by Alfred Koebele in 1888, there is a long history of successful importations that save millions of dollars... (full context)