“Most states previously only tested for delta-9 tetrahydrocannabinol, or THC, the psychoactive molecule in cannabis. Under the USDA’s Interim Final Rules, however, the test now also includes decarboxylated THC-A, which converts to THC when heated,” Laird said. "Under this test, known as ‘Total THC,’ many of the newer high-CBD hemp strains will test ‘hot’ and exceed the .0.3% limit, which means the plants will be considered marijuana and will need to be destroyed. "