Potassium Phosphite Mixed with Other Fungicides Reduces Yield Loss to Downy Mildew on Collard

Fig. 1. Initial symptoms of downy mildew on collard leaves with leaf wetness provided by mini-wobbler sprinklers.



Image from Plant Health Progress article:
Potassium Phosphite Mixed with Other Fungicides Reduces Yield Loss to Downy Mildew on Collard