Causes and control methods of swelling of stem base of asparagus

Asparagus is a common leafy vegetable, we often use it to stir-fry or cold salad, it is also a widely planted market, many growers often have swelling at the base of the stem when planting, which seriously affects the quality of a large number of asparagus. So what is the cause of the swelling of the stem base of asparagus? How to prevent it? Let's learn more about it.

First, the cause of swelling at the base of the stem of asparagus

As for the swelling of the stem base of asparagus, many people think that it is the harm of thrips and virus disease, but it is not, it is mainly caused by white rust. Hollow cabbage white rust infection stem base or root, will appear yellowish brown deformity swelling, 1-2 times larger than the normal stem, the shape is round and irregular, there will also be white herpes. In addition, the tender stems will also appear thickening deformities, which will weaken the growth ability of stems and leaves and affect the yield and quality of asparagus.

II. Prevention and control methods

1. Preventive measures

Pay attention to the selection of disease-resistant varieties, 2.5% nitrile suspension seed coating can be used before sowing, which can effectively prevent the disease caused by seed disease; pay attention to reasonable crop rotation, rotation with non-rotational flowers for 2-3 years, or rotation with rice. Hollow vegetables prefer fertilizer and apply more organic fertilizer, light before and after topdressing, urea or compound fertilizer after harvest, and foliar spraying of potassium dihydrogen phosphate and brassinolide to promote early growth and rapid development of stems and leaves and improve disease resistance.

2. Chemical control

Spray can be used at the initial stage of the disease, such as 72% urea ·manganese-zinc wettable powder, 69% enylmorpholine ·manganese-zinc wettable powder, 1500 times pyrazolyl ester EC, and so on. Use 1500-2000 times of 25% pyrimethrin suspension or 75% chlorothalonil wettable powder before the onset of the disease. When using agents, we should pay attention to the rotation of agents to avoid drug resistance and reduce drug residues at the same time.

Can you still eat an enlarged stem base?

Hollow cabbage can still be eaten after swelling, although it is a disease caused by fungal infection, but there is still no problem with its use, but hollow cabbage with swollen tender stems does not sell well and is not loved by consumers, so in order to protect its own planting efficiency, attention should be paid to the prevention and treatment of this disease.

The above is the introduction of the causes and prevention methods of the swelling of the stem base of asparagus. I hope it can help you. If you want to know more about it, please pay attention to us.