In 1888, USDA sent an entomologist to Australia to collect vedalia beetles for California’s cottony cushion scale; within a year, the pest had sharply declined
The cottony cushion scale insect threatened California's citrus growers with devastation. The USDA took action by sending a scientist to Australia in search of a natural enemy. They found the ladybird beetle, Rodolia cardinalis, which was then introduced to California. This predator quickly reduced the pest population, rescuing the citrus…
The Economic Times ·