Stop sale of ArmorTech Alt 70 Fungicide

Products based on phosphites or phosphonates are good, low toxicity fungicides that are widely used for control of Pythium, anthracnose and algae. But one of these products, ArmorTech Alt 70, produced by the company United Turf Alliance (UTA), has reportedly been involved in serious damage to bentgrass greens in some northeast locations. As a result, UTA has voluntarily stopped sale of the product. By the way, annual bluegrass appears to be less sensitive to this problem.…