If you read the article, you will note that Hundreds of white farmers and tens of thousands of their black workers have been driven off farms and disruptions in the agriculture-based economy, along with erratic rains and floods, have led to severe food shortages.

These were paid workers, not slaves. A case can obviously be made that the original colonization of this area by Europeans was done on a less than equitable basis, but right now the white/capitalist remnants are probably the only thing holding up some vestige of productivity.

And I'm not seeing any black capitalist leaders on the horizon to make it work.

For the record, all else being equal, slave labor sucks for productivity when compared with free workers. Only in very primitive endeavors does slave labor work at all. Had the American Civil War never occurred, and the South remained a separate nation, mechanized farm techniques would have blown the South off the map in agricultural competition.