In a word GREED, humanity imposes itself on the environment not the other way around, eventually we the little people(self supporting) have to protect our small domestic production from virus, spores and resistant pests created where? in commercial operations, and then pay more for bought goods made more expensive by overpriced chemical solutions produced by companies exploiting opportunity created by greed not need. We were a clean Continent.........That's what I was worried about. Probably how it's spread so badly in US
Hope we learn............our Border Protection missed Bananas and Apples....what next I ask?