Potato late blight is a common disease of potato, which will damage the roots and leaves of potato, thus affecting the quality and yield of potato.

However, potato late blight can also be prevented by many drugs.

1.58% metalaxyl? Manganese-zinc wettable powder is a bactericide with both protective, preventive and therapeutic effects. Can be used in the early stage of late blight. The dosage is 0/00 ~120g per mu, and 50 kg of water is added. The number of spraying depends on the field conditions. The fields with mild illness are sprayed two or three times, and the fields with serious illness are sprayed four or five times, with an interval of seven days.

2.69% alkenyl? Manganese-zinc wettable powder is also a bactericide with both protective and therapeutic effects. It is suitable for the early and middle stages of the disease, and the dosage is per mu100 ~133g, and 50 kg of water is sprayed. The number of spraying depends on the field conditions, with two or three times in the field with mild illness and four or five times in the field with serious illness, with an interval of seven days each time.

3.25% metalaxyl suspension concentrate is a kind of bactericide with therapeutic effect, which is suitable for the early and middle stages of the disease. The dosage is 25 grams per mu and 50 kilograms of water, and the spraying frequency depends on the condition. Two or three times for plots with mild illness, and four or five times for plots with serious illness, with an interval of seven days each time.

4.25% azoxystrobin suspension concentrate is a kind of bactericide with therapeutic effect, which is suitable for spraying at the early stage of onset. The dosage is 0/5 ~ 20g per mu/kloc-and 50kg of water. The frequency of spraying depends on the situation in the field. Two or three mild attacks, four or five severe attacks, with an interval of seven days each time.