How long do carrots usually take to harvest? What are the common pests and diseases and their control methods?

Carrots, also known as carrots, sweet asparagus, are edible vegetables often eaten in daily life, and they are also a kind of biennial herbs planted all over the country. How long will the carrots be planted and harvested? What are the common diseases and insect pests and their control methods?

First, how long can carrots be planted and harvested?

Carrot is a biennial plant, so its growth cycle takes two years from sowing to seed ripening, and it usually takes two years to harvest. However, due to the development of artificial planting technology, through hybridization and improvement, the harvest time of many carrots has been shortened a lot, and the harvest time of each variety is different, so let's make a brief introduction.

1. Hybrid variety Hongsen

Hongsen is a mid-and late-maturing variety of carrots, which is cold-resistant, sweet and tastes good. It can be harvested about 95 days after sowing.

two。 Japanese hybrid carrot

The variety has strong cold tolerance and can be sowed in spring, summer and autumn, and can be harvested 110 days after sowing.

3. Super Red Core, Seoul six inches, Baoguan

These two varieties can be harvested about 100 days after sowing, and the yield per mu can reach more than 5000kg. The crown will be available for sale about 70 years after sowing.

4. France Aya and Chunhong No.2

These two varieties are precocious carrot varieties that can be harvested in 90 days and can be sown in spring in non-reissued areas of our country.

5. Hongying No.2

This variety can be harvested 95 days after sowing, and its bolting resistance is very strong, so it is suitable for plastic film sowing and close planting in early spring.

Second, what are the common diseases and insect pests of carrots and their control methods?

Although the varieties selected now have strong disease resistance, they are still prone to diseases and insect pests if they are not managed properly. Here are some common diseases and insect pests and their control methods in the process of carrot planting.

1. Ground tiger

The harm of the ground tiger is generally that its larvae eat carrot seedlings, resulting in lack of seedlings and broken ridges.

Prevention and control methods: if the number of insects is small, it can be killed manually, and if the quantity is large, poison bait is used to trap and kill.

two。 Seed fly

Seed flies harm the underground roots of carrots with larvae, causing wounds in carrots, which is easy to cause bacterial infection.

Control methods: during the occurrence of adults, 1 part of sugar, 1 part of vinegar and 2.50 parts of water were used to trap and kill them at noon on a sunny day.

3. Aphids

Aphids are also common pests that harm the growth of carrots.

Control method: spray the plants with 1500 times of imidacloprid and 5% imidacloprid. For the seriously damaged plants, they should be removed and destroyed.

4. Black rot

The occurrence of black rot is easy to cause ununearthed carrot seedlings or seedling seedlings to collapse, adult plants to die, and under certain conditions will also infect other healthy carrots.

Control methods: carrot planting areas in North China used protective fungicide 40% chlorothalonil suspension 200 ml per mu in the early or early days of July, sprayed once every 10 days, and used continuously for 3 times for 4 times. the control effect of low input and high output can be achieved.

5. Spot blight

Spot blight is also a major disease of carrots, which not only affects the growth, but also reduces the quality and yield of carrots.

Control methods: the seeds were treated limited before sowing, the stagnant water in the field was removed in time after rain, the diseased plants were pulled out in time, and the mancozeb wettable powder solution or Xinwansheng wettable powder solution could be sprayed at the initial stage of the disease.

In the process of carrot planting, the prevention and control of diseases and insect pests should be given priority to, in addition, the use of pesticides should be based on low drug damage.