How to control rice Phytophthora?

Rice Phytophthora: the diseased field should be drained and sunburned in time, which can effectively restrain the spread of the disease. The key point of chemical control is to protect the seedlings of early rice at 3-leaf stage. Generally speaking, the medicine should be applied before or after anti-cold irrigation. The medicaments are: 50% carbendazim 1000 times solution; 50% topiramine or 50% benzoate 500 times solution; 40% Phytophthora net 500 times solution. The above fungicides are all sprayed and strive to spray evenly.