What are celery pests? What is the prevention method?

Celery is as famous as parsley. Frightening vegetables. It is generally divided into two kinds in our country. Western celery and celery. Because the planting time is relatively long, the distribution is also relatively extensive, and the economic benefit has always been very good, so many farmers are willing to plant. But its diseases and insect pests are also more complicated to manage. Next, let the editor introduce celery diseases and insect pests and their prevention and control methods.

Diseases and insect pests of celery

The first kind: leaf spot

The symptom of leaf spot disease, which mainly harms the leaves of celery. In the initial stage, the leaves show yellow-green spots, and then the development will form round disease spots, the size of the disease spots is generally 4-10 mm, the color of the spots is grayish brown, the edges of the leaves are slightly darker, and if the occurrence is more serious, it will expand into patches, and then cause the death of the leaves.

The lesions on the stems and petioles are oval, about 3-7 mm in size, grayish brown in color and slightly sunken. If the disease of the plant is more serious, it will cause lodging of all plants.

The second kind: soft rot

Soft rot usually occurs on the petiole or stem of celery. It begins with a water-immersed beige spindle, then shows wet rot, and then blackens and stinks, remaining on the celery skin. The pathogen usually spends the winter in the soil and is soaked from the celery wound. If it rains, it will spread along with Rain Water or when watering. The disease will be serious when the humidity is relatively high in the later stage of celery growth.

The third kind: knot nematode disease

The performance of knot nematode disease is that the plant stops growing, then the color of celery is not the normal color, there is relatively high humidity, and then the plant wilts. These symptoms are caused by nematodes causing damage to the roots.

2. control methods of diseases and insect pests of celery

1. Suggestions on the prevention and control of leaf spot.

When we choose varieties, we should choose some disease-resistant varieties as much as possible. When collecting seeds, you need to collect seeds on plants without disease, soak seeds in water temperature of 48 degrees Celsius for 30 seconds before sowing, and crop rotation for more than two years. There is also the need for reasonable close planting and scientific irrigation, so as to prevent the temperature from getting too high; 50% of carbendazim wettable powder can be sprayed at the beginning of the disease.

2. Opinions on the prevention and control of soft rot

Rotation needs to be carried out for more than two years, and root damage should be avoided when loosening the soil and fixing seedlings; then, the soil should not be cultivated too high, and the petiole should not be buried in the soil; drainage should be carried out in time after rain; and if it is found that a bar plant needs to be pulled out in time, and then disinfected with lime.

Water as little as possible or stop watering temporarily during the onset of the disease. 72% agricultural streptomycin sulfate wettable powder can be sprayed in the early stages of illness. Generally, it is sprayed every 7-10 days, and it can be sprayed 2-3 times continuously.

3. Opinions on the prevention and control of knot nematode disease

Reasonable rotation is needed and disease-free soil is needed to raise seedlings; most of the root-knot nematodes are located within 3-9 cm of the soil surface, and the harm can be reduced if they are ploughed deeply.

When sowing or planting, 10% Manku granule 75kg HM2 should be applied; if the disease occurs during growth, the management should be strengthened, and we need to thoroughly clean up the remains, and then carry out centralized burning. Reasonable irrigation and fertilization should also be carried out to enhance its disease resistance.

All right, these are the celery diseases and insect pests brought by the editor of Tuliu.com and the prevention and control methods. I hope it can be helpful to all of you.