When is the lotus root usually planted? Attached pest control techniques

Lotus root is a kind of plant that grows in marshes and is one of the daffodils. Lotus root taste crisp, slightly sweet, not only can be cooked, but also can be eaten raw, rich in nutritional value, is a good nourishing ingredients. The main producing area of lotus root in China is mainly in Hubei. Let's take a look at when the lotus root is usually planted. Attached pest control techniques.

First, when is the lotus root usually planted?

The planting time of lotus root is related to the region and temperature. generally speaking, the best time for planting lotus root is March or April every year. The most suitable temperature for lotus root growth is about 20 to 30 degrees, so the earliest temperature for planting lotus root must also reach more than 15 degrees, otherwise the chance of survival is not high. There is a big difference in temperature between the south and the north of our country, so lotus roots are usually planted in the south in February and March, while in the north they are planted a little later in April and May.

2. Control techniques of lotus root diseases and insect pests

1. Brown spot of lotus root

A common disease in the lotus leaf, which produces light brown spots on the leaves, causing local dryness of the diseased leaves.

Prevention and treatment: reasonable close planting to ensure ventilation and light in the lotus root field; appropriate application of phosphorus and potassium fertilizer to improve plant resistance and timely removal of diseased plant residues. Spray 25% carbendazim 600x solution or 75% chlorothalonil 1000 times solution at the initial stage of the disease.

2. Rot of lotus root

Fusarium wilt, also known as Fusarium wilt, infects the underground stem and causes rot. when it is serious, the whole field is withered and yellow, like a fire.

Prevention and treatment: seriously diseased fields should be rotated for 2-3 years. Commonly used 70% methyl topiramate 1000 times solution or 75% chlorothalonil 800x solution spray suffocation, cover agricultural film sealed for 24 hours, dry after planting. Turn the lotus root field deeply and apply 150 kilograms of lime per mu. When you get sick, you can mix 0.5 kg of 75% chlorothalonil and 30 kg of dry soil and sprinkle it into the shallow paddy field.

3. Black spot of lotus root

Brown streak, also known as brown streak, occurs only on the leaves. In severe cases, the disease spots converge and the leaves are withered and yellow.

Control: thoroughly remove the diseased and residual leaves in the field in winter and burn them centrally. At the initial stage of the disease, the diseased leaves were removed and sprayed for prevention and treatment. Commonly used 70% methyl topiramate 1000 times solution, or 65% Dysen zinc 600x solution, or 1morphine 160200 times Bordeaux solution, spray once every 10-15 days, a total of 2-3 times.

4. Lotus root streak virus disease

Symptoms can be shown on the damaged lotus leaves and underground rhizomes, with large polygonal to irregular light brown spots on the leaves and dark brown anthrax spots on the rhizome epidermis.

Prevention and treatment: select disease-resistant varieties, timely control aphids (transmission vector), spray 1.5% Zhishanling emulsion 1000 times at the initial stage of the disease.

5. Common diseases and insects

There are aphids, large coir moth, pear green moth, brown thorn moth, harmful to standing leaves and buds. It can be sprayed with 80-1000 times of 90% trichlorfon or 40% of 2000 times of dimethoate.