This is already done in some cases, cocoa is one example. Some decades ago a disease started spreading amongst cocoa crops, and no solution was known. It still

This is already done in some cases, cocoa is one example. Some decades ago a disease started spreading amongst cocoa crops, and no solution was known. It still menaces crops today. Turns out cocoa is less sensible to disease if you grow it inside the forest vs as monoculture, but because of the shade and density the production is smaller.