Potassium Salt of Phosphorous Acid
It is is primarily a water-soluble fungicide.
It is were effective in controlling diseases caused by a group of fungi known as the oomycetes (Phytophthora, Plasmopara, Pythium, and others)
It has remarkable efficacy for Pythium diseases and other diseases caused by oomycete fungi when applied preventatively.
There are several of this kind product available in market but most of them are result of poor production process and remain less efficient and of poor quality.