If you are in the south, you can start planting in July, and the farther north you go, the later you will be. If you are near the Yangtze River, you can start planting around August. If you are in the north, such as Henan, you can start planting around 10. It is not recommended to plant after October.
Mustard is harvested in stages, and each harvest should be large and small, and the plants should be even and appropriate. Shepherd's purse is sown in early autumn, and the true leaves10 ~13 are harvested 30 ~ 35 days after sowing, and then harvested 4 ~ 5 times in stages until the end of next March, with a total yield of 2500 ~ 3000 kg per mu. /kloc-it takes 45 ~ 60 days to harvest the autumn shepherd's purse sown in early October. Shepherd's shepherd's purse sown in late February was harvested and put on the market in early April. Spring sowing is generally harvested1~ 2 times, and the yield per mu is about 1000 kg.
Extended data:
Pest control of kohlrabi
1, black spot disease
It mainly damages leaves, and the lesion is round or nearly round, light brown to brown, with obvious concentric rings (cabbage) or not (mustard), and yellow halo around it. When the disease is serious, the lesion converges, resulting in partial or total leaf death and easy perforation of the lesion. The above two diseases are fungal diseases.
Control method: 75% chlorothalonil 500 times solution or 58% metalaxyl manganese zinc 500 times solution is added with plant dragon spray, which is sprayed for 2-3 times every 7- 10 day.
2. Soft rot
It is a bacterial disease, and germs often invade from the wound. At first, it is a water-soaked infiltration spot, and then it gradually expands, causing rot and mucus to flow out, and the affected part gives off a bad smell.
Control method: use 72% agricultural streptomycin 3000-4000 times solution or neophytomycin 4000 times solution plus phytotron spray once every 10 day for continuous control for 2-3 times.
3. Virus disease
Commonly known as mosaic disease, the main symptoms are bright veins and mosaic, leaf shrinkage, stunted plants, poor root development, and yellow-brown root section.
Prevention and control methods: prevention is the main method, first of all, aphids, the transmission vector, should be eliminated, and drugs should be used for prevention and control at the early stage of the disease. Use 20% virus A500 times solution or 1.5% zhibingling No.2 1000 times solution and add plant dragon spray once a day for 2-3 times. insect pest
4. Aphids, Pieris rapae and Plutella xylostella can be sprayed with 500-600 times solution of Caixing or 2 1% solution to kill 2000, 1000- 1500 times solution. Pay attention to spraying evenly and thoroughly, and control it for 2 or 3 times according to the insect situation.
References:
Baidu encyclopedia-kohlrabi