Control of common diseases of kale

Kale is a specialty vegetable with a long history of cultivation in China. Up to now, there have been dozens of varieties, and the taste is also widely loved by everyone. However, when growing kale, there are always a lot of diseases troubling the growers, so what diseases are more common in kale? Next, the pro-agricultural network will take you to learn about it.

1. Black rot

Black rot is one of the common diseases of kale. At present, few varieties can escape this disease. The main location of the disease was concentrated in the leaves, and then extended to the rhizome. The cause of the disease is mostly due to the existence of certain wounds in the leaves or the presence of pathogens in the soil, which follow into the leaves when kale absorbs water. Some good spots will appear at first, and then change color and rot. After discovery, it is recommended to use 600 times solution of 3% Zhongshengmycin wettable powder for prevention and control.

2. Soft rot

It has a great impact on kale. If you don't pay attention to it in the early stage, the plant will die in the later stage. The location of the disease is concentrated in the rhizome, a water-stained circle will appear in the rhizome at the initial stage, and then the nutrient transport of the plant will be hindered; the whole plant will show a yellowing state, and some will show an one-sided situation, and finally the root will rot and stink; when it is the most serious, it will die directly. After discovery, choose whether or not to remove the plant according to the situation, and then spray 72% streptomycin sulfate 3000 murine 4000 times, the place where the disease must be sprayed more.

3. Downy mildew

Downy mildew appears most frequently in the seedling stage of kale, and it is the most obvious on the leaves, and it is also a disease that can be easily found. At the initial stage, it will appear on the leaves in the form of small round spots, which will be induced with the increase of humidity. The round spots will slowly turn gray, and then react with the humidity in the air to produce mildew spots and spread, which will seriously affect the yield of the fruit. Downy mildew is easy to appear in a large area, so the early feather is very important, you can use 72.2% chloramphenicol water agent 600rel 800 times during the rainy season or after the onset of the disease.

4. Aphids

Among these parasites, aphids are the most harmful and the least easy to find, so we must pay attention to them. There are not many aphids when they appear at the beginning, but they are propagated in the later stage. Aphids will attach to the backlit surface of the leaves, and then absorb nutrients from the leaves. When the leaves are found to be abnormal or yellow and dry, check whether there are aphids on the back. For aphids 50% parathion EC 1000 Mel 1500 times solution has a good control effect on them.

Because of the shape of kale, many symptoms of kale need to be seen carefully. Selective spot checks can be carried out during daily field management, and the moisture of the soil must be maintained to avoid a series of diseases caused by moisture.