The opuntia cactus are spread like a weed, killing off thousands of acres of grassland.

这种仙人掌像杂草一样疯狂生长，数英的草地被毁。

The producers are making microorganisms so that they can be spread all over for them to reduce the the opuntia.

生产者正微生物，以便它们能够被分散到所有的地方，以减少仙人掌的数量。

Meanwhile, for ranchers like Mamai, the opuntia is simply a way to be destroyed.

与此同时，对马迈这样需要把仙人掌消灭掉。