How to prevent and control common diseases of oilseed rape? A detailed guide to the latest methods

Oilseed rape is a very important oil crop in our country. Its flowers can be eaten, and after the seeds are dried in the sun they can be pressed into oil. It is a crop with very good planting prospects, and oilseed rape also has very high ornamental value; it is planted on very large areas at many tourist attractions. But to successfully grow oilseed rape, you must prevent and control diseases well, otherwise the harm from disease is extremely great. So what are the common diseases of oilseed rape? How should they be prevented and controlled? Let's take a look!

1. Brown spot disease

Disease characteristics: Brown spot disease mainly harms the leaves of oilseed rape. In the early stage after the leaves are infected, water-soaked irregular patches appear on the leaves. As time goes on, the color of the patches gradually deepens. The size of the patches also expands, and in the end all the patches connect together to form one whole area, causing the leaves to drop.

Prevention and control methods: Fertilization must ensure nutritional balance; do not apply a single fertilizer, especially nitrogen fertilizer. According to the condition of the plants, appropriately spray some foliar fertilizer to promote plant growth and strengthen disease resistance. For infected plants, pesticides such as thiophanate-methyl wettable powder can be sprayed. Spray for one and a half months, and the interval must not exceed half a month at most.

2. Gray mold

Disease characteristics: Gray mold mainly harms the stems and leaves of the plants. At the seedling stage, the diseased stems and leaves show water-soaked rotting. After the plants mature, infection starts on the leaves closest to the ground. Its symptoms are also water-soaked patches, but they expand extremely quickly, causing the stem to rot completely and affecting growth. Also, if the surrounding environment is relatively humid, colored mold spots will appear on the patches.

Prevention and control methods: Keep the temperature and humidity of the vegetable garden constant and prevent excessive fluctuations. If a water film forms on the plants, remove it promptly, and control the temperature difference between day and night well. Before disease onset, pesticides such as chlorothalonil can be used for prevention, and after disease onset, procymidone can be used for control.

3. Downy mildew

Disease characteristics: Both seedlings and mature plants can develop downy mildew, but the disease is more serious at the mature stage. When disease occurs, it mainly starts from the lower leaves and then extends all the way upward. As with the previous two, colored patches appear on the leaves, but they are pale yellow. When humidity is too high, mold spots also appear on the spots. If not handled in time, it causes the plants to die in the later stage.

Prevention and control methods: Before planting, control the planting density well to prevent overly dense planting, control the temperature in the vegetable garden well, and take timely corresponding measures in the face of various sudden weather conditions. After maturity, control the amount of watering, and do not irrigate with large amounts of water. After disease onset, use propamocarb aqueous solution for spray control, once a week for one month.

The above are the common diseases and prevention and control methods when growing oilseed rape. If you want to make money by growing oilseed rape, the planting area must be very large. Therefore, management is also rather troublesome, and it is impossible to observe the growth of all oilseed rape in time, so we must do a good job of prevention to prevent large-scale disease outbreaks and reduce our planting profits. This article is for reference only, and we hope it can be helpful to everyone.