Chlorothalonil (2,4,5,6-tetrachloroisophthalonitrile) is an organic compound mainly used as a broad spectrum, nonsystemic fungicide, with other uses as a wood protectant, pesticide, acaricide, and to control mold, mildew, bacteria, algae.

Why is chlorothalonil banned?

Chlorothalonil produces severe eye irritation in rabbits (Toxicity Category I). The Agency has classified chlorothalonil as a likely human carcinogen (formerly Group B2).

Can organic farmers use fungicide?

Time For The Truth: Yes, Organic Farming Uses Pesticides Contrary to popular belief, organic farming does use pesticides. Over a hundred fertilizers and inputs (pesticides, insecticides or fungicides) are authorized by organic farming regulations in Europe and the United States.