The pesticides used by organic farmers include living, bt toxin containing bacteria known to produce allergies in humans, rotenone, a chemical used Air Jordan Blue Legend to kill rats and fish, and copper sulfate, a toxic salt. None of these pesticides is very effective, and their residual content on organic produce is never measured. In contrast, super sensitive tests are used to detect miniscule amounts of man made pesticide residues on traditionally grown produce. Organic farming is 20 percent less productive than traditional farming due to selective Air Jordan Blue Legend loss of soil minerals and increased susceptibility to pests and pathogens. Organic farmers are fairly competitive when growing vegetables and fruits, less Air Jordan Blue Legend successful at growing staple foods such as corn.