Common diseases and control of cauliflower

Rapeseed is a very important oil crop in China, its flowers can be used for edible, and rapeseed can be pressed into oil after drying. Is a very promising crop, rape also has a very high ornamental, in many tourist attractions have a very large planting area. However, if we want to plant rape successfully, we must control the disease well, otherwise the disease will do great harm. So what are the common diseases of rape? How to prevent and cure it? Let's have a look!

1. Brown spot

Disease characteristics: Brown spot mainly harms the leaves of rape, after the initial stage of the disease, waterlogged irregular patches will be produced on the leaves, with the increase of time, the color of the patches will gradually deepen. The size of the plaque also expands, and in the end all the patches are connected together, forming a whole patch, causing the leaves to fall.

Control methods: fertilization should ensure nutritional balance, do not apply single fertilizer, especially nitrogen fertilizer, spray some foliar fertilizer according to the situation of the plant, promote plant growth and strengthen plant disease resistance. The diseased plants can be sprayed with methyl thiophanate wettable powder for one and a half months with an interval of no more than half a month.

2. Grey mold

Disease characteristics: Botrytis cinerea is mainly harmful to the stems and leaves of the plant, in the seedling stage, the diseased stems and leaves will show waterlogged rot. After maturing, the disease begins on the leaves closest to the ground, and its symptom is to produce waterlogged patches, but it expands so fast that the stems all rot, affecting growth, and if the surrounding environment is humid, there will also be colored mildew spots on the patches.

Prevention and control methods: to keep the temperature and humidity of the vegetable garden constant, to prevent excessive ups and downs, the emergence of conjunctiva on the plant should be erased in time, and the temperature difference between day and night should be controlled. Chlorothalonil and other drugs can be used for prevention before the onset of the disease, and carbendazim can be used for prevention and treatment after the disease.

3. Downy mildew

Disease characteristics: downy mildew occurs in both seedlings and mature plants, but the disease is more serious in the mature stage. When the disease occurs, it mainly starts from the lower leaves and then extends to the upper part. Like the first two, colored patches appear on the leaves, but they are yellowish, and too much humidity can produce mildew spots on the spots. The plant withered when it was not treated in time to the later stage.

Prevention and control methods: before planting, we should control the planting density, prevent the planting from being too dense, control the temperature in the vegetable garden, take corresponding measures in time in the face of all kinds of sudden weather, control the amount of water after maturity, and prohibit watering. After the onset of the disease, the use of Purek water spray for prevention and treatment, once a week, lasting for one month.

These are the common diseases and control methods when planting rape. If you want to make money by planting rape, its planting area must be very large. Therefore, it is troublesome to manage, and the growth of all rape can not be observed in time, so we must do a good job in prevention, prevent large-scale disease and reduce our planting benefits. This article is for reference only. I hope it can be helpful to you.