When will the peanut head be filled with medicine?

Peanut is a kind of crop suitable for growing in warm, sandy soil areas, and the number of ripening varies in different regions. There is a planting system of one crop a year, three crops a year, two or three crops a year, so when will the first medicine of planting peanuts be injected?

When will you take the medicine all over the peanut head?

During the period from seedling stage to early flowering stage, peanut head medicine can be sprayed evenly with appropriate amount of medicine mixed with water. At this time, the application can make peanut branches and leaves strong and improve disease resistance.

II. Peanut cultivation techniques

1. Temperature

Peanut seed germination requires higher temperature, the suitable temperature of pearl bean type is 12-15 ℃, and that of common type is 15-18 ℃. Some varieties have strong dormancy and are difficult to germinate at low temperature.

2. Fertilization

Nitrogen application should not be too much in peanut seedling stage. According to the soil conditions, the effect of applying boron and other trace elements is remarkable. Nitrogen, phosphorus, potassium and boron can be fertilized outside the root. When the yield is about 250 kg per mu, about 5-7 kg of nitrogen, 1-1.2 kg of phosphorus and 2-3.5 kg of potassium are absorbed per 100 kg pods, and the requirement of calcium is second only to potassium.

3. Watering

Peanuts are more drought-tolerant, but they require a lot of water. For every 1 kg of dry matter produced, about 225 kg of water is needed. The flower and pod stage, which accounts for about 50% of the total water demand, needs the most water and has the greatest impact. Drought during this period will affect flower bud differentiation, flowering, fertilization and fruit needle elongation. The dryness of the ground also hinders the penetration of fruit needles. Rainy areas in the south should pay attention to drainage, so as not to affect the normal development of pods.

4. Diseases and insect pests

Common diseases include peanut rust, early spot, brown spot, late spot and other fungal diseases harmful to leaves. The effect of peanut rust on yield was greater than that of leaf spot, especially in the south of Yangtze River in China, especially when Rain Water was too much and the field humidity was too high. Early and late spot disease occurs relatively late, and its effect on plant growth and development is chronic. As peanut has entered the mature stage, it is easy to ignore its harm.

Peanut bacterial wilt and root-knot nematode disease are also serious in some concentrated producing areas. Reasonable crop rotation is an effective control method. In China, peanut virus diseases mainly include arbuscular disease, mosaic disease and dwarf disease. Arbuscular disease is more serious in the southeast coast, when the onset of the fruit needle is not to the ground and reverse hook-shaped, commonly known as "peanut male". Early sowing of spring peanuts and delayed sowing of autumn peanuts have the effect of avoiding disease. Mosaic disease and dwarf disease are more common in the north. Other diseases such as root rot, Sclerotinia sclerotiorum, shell rot, crown rot and leaf rot also occurred. Comprehensive control measures are generally used, such as crop rotation, disease resistance breeding, seed selection, strengthening management, paying attention to drainage and so on.