Traditional Culture Encyclopedia - Weather inquiry - What medicine can kill the grass and spirogyra in the lotus pond?

What medicine can kill the grass and spirogyra in the lotus pond?

According to the experience in recent years, 50% prometryne, 50 grams per mu, is widely used as a herbicide in lotus fields, but there are also phytotoxicity. Precautions: Do not use the medicine in rainy days or at low temperature (below 20℃), and do not increase the dosage at will. For details, please consult local technicians. The above is for reference only.