What are the potato diseases and pests, and what are the precautions for potato planting?

Virus disease, late blight, ladybug and grub are common diseases and insect pests of potato. Potato viru

What are the potato diseases and pests, and what are the precautions for potato planting?

Virus disease, late blight, ladybug and grub are common diseases and insect pests of potato. Potato virus disease is characterized by short plants, slow growth and curly leaves. Morphine hydrochloride and 3% aminoglycoside were used for prevention and treatment at the initial stage of the disease. Ladybugs feed on mesophyll and fruit, which is harmful to potatoes. 5.2% avermectin and 10% beta-cypermethrin can be used to control ladybugs.

1. What are the potato pests and diseases?

1, virus disease

Potato virus disease will appear short plants, slow growth, curly leaves and dark colors. Morphine hydrochloride and 3% aminoglycoside can be sprayed at the initial stage of the disease. In addition, aphids can spread viruses between potatoes, and 5% acetamiprid can be used to kill aphids.

2. Late blight

When potato suffers from late blight, the tip or edge will produce waterlogged, green-brown spots, gray-green halo on the edge, and the outer edge will appear when the humidity is high? Penicillium rotundum is more obvious on the back of leaves. Large dark brown patches appeared on the surface of tuber, and the subcutaneous potato meat was reddish brown, which gradually expanded and rotted. In order to prevent and control late blight, reasonable close planting, ventilation, timely removal of diseased branches in the field and establishment of disease-free reserved land should be carried out; Zineb, mancozeb and fluazinam were selected for prevention and treatment in the early stage of the disease.

3. ladybugs

Ladybugs feed on mesophyll and fruit, which is harmful to potatoes. The affected potato leaves will dry up and turn yellow. Fruit is often broken when chewed, thick and bitter, and can't be eaten. Insecticides such as 5.2% avermectin, high chlorine, 10% beta-cypermethrin can be used to kill insects.

4. food

White grub is an underground pest, which sucks newly sown seeds and seedlings and harms the growth of potatoes. To prevent and control grubs, we should avoid using immature fertilizers, and we can use black light to trap and kill them. Pesticide control can use abamectin and phoxim to irrigate roots.

Second, the potato planting matters needing attention

1, light intensity and sunshine hours can affect potato yield. If potatoes grow in poor light or insufficient light, the plants will become thinner, and then the leaves will become thinner and paler, which will lead to low photosynthetic productivity.

2. The suitable temperature for the growth of potato stems and leaves is 18℃-22℃. When the average daily temperature is over 35℃ or below 7℃, the stems and leaves stop growing. When the temperature is-1℃, the seedlings will be frozen and the plants will freeze to death at -3℃.

3. Excessive soil moisture and poor drainage will cause soil hypoxia, affect root development, even root rot, and greatly reduce production. High humidity is also prone to late blight, causing a large number of tubers to rot.