Okay kiddo, let's talk about the Medfly attack that happened in California in 1989.
So first, what is a Medfly? It's actually short for Mediterranean fruit fly, which is a type of bug that likes to munch on fruit.
Now, in 1989, a bunch of these Medflies started showing up in California and eating lots of delicious fruit. This was a big problem because if the Medflies kept spreading, they could destroy all of the fruit crops in California!
So the government had to come up with a plan to stop the Medflies from spreading. They decided to spray a special pesticide over the area where the Medflies were found. This pesticide would kill the Medflies before they could eat any more fruit.
But some people were worried about the pesticide, because they were afraid it could harm other bugs or even people. So the government had to do a lot of testing and make sure the spray was safe before they used it.
In the end, the spraying worked and the Medflies were stopped from spreading. But it was a big scare for all the farmers and people who love fruit, and it taught everyone how important it is to protect our crops from pests.