Afganistan opium production

Reports I've read claim that opium production is steadily increasing in Afghanistan. The Taliban and Al-Qaida are said to be raking in millions in de facto taxes from this drug trade (although, I suspect that they are not the only ones).

We probably don't have enough napalm bombs to take out all the poppy fields, but there is, perhaps a practical solution to the drug production problem over there.

What if the U.S. and other concerned nations bought the entire poppy crop of every Afghan grower and destroyed all that could be harvested?

We could then train, fund, and otherwise assist Afghan farmers in cultivating other crops that would be much more useful to the people in that part of the world.

Then, if anyone decided to go back into the opium trade, we could use our limited supply of napalm bombs to destroy the crops (and the farmers that grew them).

It might be more economical in the long run and would definitely be more effective than anything yet tried. At any rate, it would reduce the supply of opium and increase the supply of food and other cash crops.

Yeah, I know it would make us look like bullies, but I can live with that.