What are the prevention and control methods of Fusarium wilt of Ligustrum lucidum?

Golden leaf privet, also known as English privet, is a hybrid of California Phnom Penh privet and European privet. Because of its unique golden color, it has important value in landscape configuration, and it is used more and more in urban greening in recent years, but the golden leaf privet is also easy to suffer from Fusarium wilt, so what are the prevention and control methods of Fusarium wilt?

I. symptoms and incidence regularity of Fusarium wilt of Ligustrum lucidum.

After Ligustrum lucidum infected with this disease, the leaves wilted and drooped, the leaves lost luster, gradually lost green to the leaves withered and yellow, until the whole plant withered, the stem epidermis was easily plucked away, and the underground part of the fibrous root was withered and easily broken. Fusarium wilt of Ligustrum lucidum is a fungal infectious disease.

Pathogens overwintered in soil and disease, invaded by underground roots, spread to all parts of plants through vascular bundles, and proliferated in vascular bundles, resulting in blockage or poisoning, resulting in loss of transport function and wilting and death of plants. After the pathogen infects the root, the function of nutrient and water transport is lost, which makes the plant lack of nutrition and then die.

High temperature and humidity and stagnant water on the ground are conducive to the occurrence of the disease, so the peak of Fusarium wilt of Ligustrum lucidum is from June to August every year, and continues until October. Fusarium wilt is more harmful to seedlings than old seedlings, and it is a destructive disease. Once it occurs, almost all of them die, so prevention is the key.

2. control methods of Fusarium wilt of Ligustrum lucidum

1. Avoid stagnant water

The planting area should be conducive to drainage and do not cause stagnant water.

2. Planting density should be reasonable.

The higher the plant density is, the more serious the disease is. With the growth of Ligustrum lucidum, combined with pruning and reasonable pruning, the internal ventilation and light transmission of the plant can be enhanced and the humidity and temperature can be reduced.

3. Reduce the source of disease infection.

Remove the diseased and disabled bodies from the planting site and remove weeds at any time. This can not only reduce the source of infection, but also increase ventilation and light transmission, which is conducive to creating a healthy growth environment for plants.

4. strengthen fertilizer and water management in order to increase the resistance of the plant itself.

In the aspect of road greening, the soil condition is generally barren, coupled with less fertilization, it is easy to cause plant malnutrition. Fertilizer can be applied once in spring and compound fertilizer combined with rain in the rainy season. It is beneficial to improve the resistance and recovery of Ligustrum lucidum as soon as possible.

5. Timely pruning and timely treatment of wounds

Can be re-cut in winter, into the rainy season should reduce pruning, reduce the wound, reduce the chance of germs invading from the wound. Spray fungicides immediately after pruning. Practice has proved that the more frequent pruning in the rainy season, the more serious the disease. In addition, it is necessary to disinfect the pruning tools.

6. Drug prevention and treatment

In the north, the medicine can be sprayed every 10 days or so from late June until the end of the rainy season in September. The medicament can choose 50% mancozeb wettable powder 500x liquid, 40% Dafudan 400x liquid, 70% methyl topiramate wettable powder 1000 times liquid, 50% carbendazim wettable powder 1000 times liquid.