Yellow Rust - North Korean Revenge

In the 1940's North Korea, free at last from Japanese tyranny, planned to dominate the South. The North massively increased agricultural yield through development of agro-chemicals. An off-shoot of that was covert crop contamination, to decimate harvests of their enemies, but the Korean war meant the project was mothballed. In the 1990's chemical warfare was taken forward, covertly supported by China. By 2011North Korea was damaging crops in the United States and Canada, the Ukraine, France...