The celery seedlings are seriously dead, what to do, please ask the teacher to answer

Now the celery is 30 cm long, there are still dead seedlings, okay now I can't stand up at noon, and some can stand up in the morning, what's going on, please can the teacher save the celery! Thanks!

Is there a **. Briefly describe the specific symptoms.

Rotten roots? What color are the leaves?

Blight. At the beginning of the disease, 500 times of 50% dibacyl wettable powder, 1200 times of 20% methyl phosphorus emulsifiable concentrate, and 600 times of 36% thiophanate-methyl suspension were sprayed. In addition, irrigating the roots with 30% double emulsifiable concentrate 200 10-6 375 10-6 also has a certain control effect.

It can also be applied with transplanting mixture.

Alternate pesticides and drugs, don't always use one drug, that will develop resistance.

Impactful. Sprinkled before or after watering?

Spread the manure in the ground before watering, while you are watering. Some fertilizers will flow with the water in low-lying areas, which is easy to produce fertilizer damage.

In the rainfall concentration period, attention should be paid to drainage and irrigation to prevent waterlogging and prevent root soaking. The fertilization method is mainly top dressing. The nutrients should be based on fast-acting nitrogen fertilizer. Generally, after the product is harvested at the seedling stage and each stubble, it is topdressed. Promote the rapid growth of the leaves of the stubble plant.

Bi Huxing can promote the growth of plants and relieve some pesticide damage or something.

I suspect now that you might be fattening the situation.

What is the nitrogen content of the fertilizer you are using?

Is urea large granular urea or small granular urea?

Is it from a large manufacturer or a small manufacturer?

Compound fertilizer is prone to problems, that is, the biuret is exceeded.

Well, this manufacturer is a big one.

It can cause poisoning and rot of crop roots.

You try it first and see how it goes.

If it is indeed a fertilizer damage, then you can dilute the concentration of this fertilizer by watering a lot.

Then, according to the recovery situation, you can spray some foliar fertilizer appropriately to promote growth. Be sure to do so in small quantities many times.

Promotes celery growth.

The above suggestions are for your reference.

You're welcome.

Blight, root rot and blight can all cause the phenomenon of dead seedlings and watering.

Excessive ZHI is the main factor that causes DAO disease. First Aid Method:

Genus 1 Timely loosening of soil and dissipation of moisture; 2 Spray evenly with 600 times oxafen plus Fumei double plus sodium synchlorinate, 5-7 days again, (sterilization and root promotion combined), the general one can control the spread. Give it a try.

What do you mean by bai's death?

14. Celery.

1. Detoxification and prevention of zhi virus dao

STD versions, bacterial STDs and fungi.

Right venereal diseases: celery detoxification (toxins and viruses), while preventing and controlling viral venereal diseases, bacterial soft rot and fungal late blight (dragon disease), early blight, black rot, wilt, Verticillium wilt and other diseases, strong seedlings, promote seedlings, 10 15 days in the morning, increase the yield by 40-50%, and even double the yield. Use the No. 2 agricultural streptomycin mixture + 25 grams of copper sulfate + 1 bag (15 grams) of 20% well-gangmycin. The above three types of diseases are successively alternate, mixed, and anti-growth, which can be prevented and controlled from the seedling stage (4 5 leaves).

Every 10 days or so, spray the whole plant for multiple times according to the specific disease situation.

2. Prevention and control of celery gray mold, sclerotinia and downy mildew

With No. 8 Sucrendaeb manganese-zinc mixture, from the initial onset stage, 7 10 days, 2 times can be controlled, and three diseases can be controlled at the same time.

3. Prevention and control of various insect pests in celery:

Use the No. 10 insecticide mixture for control, and you can also add insecticides to the above mixtures to prevent insects.

Note: During the growth period of one season, a total of 50 grams of 20% zinc fertilizer can be added for a total of 2 3 times, which can be added in the early growth stage. 100 grams of potassium dihydrogen phosphate, 50 grams of 5% boron fertilizer, 50 grams of urea, 2 3 times each, the three are mixed in the middle and late stages of growth. This is up to the user's choice.

One is that the manure used is not decomposed. Second, the seedlings carry pathogens.

Celery is a shallow root crop, like fertilizer but weak ability to absorb fertilizer, need to be topdressed in the growth stage of celery according to the growth stage of celery and soil fertility, in order to achieve the purpose of good growth and high yield, generally dead seedlings are caused by root rot You can directly use Haowanjia soil disease ** to irrigate the roots, in addition to less than timely drainage.

Here's why:

1. Sclerotinia sclerotinia sclerotinia sclerotinia disease: it is harmful to celery stems and leaves. The affected part is brown and water-immersed, and when the humidity is high, it is soft rot, and white hyphae grow on the surface. Finally, the stem tissue decays and is fibrous, and the stem is hollow, forming a black sclerotia like rat feces.

2. Cataplexy: After seed germination, cotyledons and embryons rot, resulting in rotten seeds. The base of the stem of the diseased seedling produces water-stained lesions, which then turn yellow-brown and shrink into threads.

When the onset is severe and rapid, the seedlings are lodging and cannot stand upright, and the appearance of the seedlings is the same as that of healthy seedlings, except that the base of the stem has been condensed into a line. White hairy mycelium is produced on the ground surface of the diseased seedlings and their vicinity.

3. Blight: occurs in the middle and late stages of seedling raising. The base of the stem of the affected seedlings produces oval dark brown lesions, and the main symptom of the yellow leaves of carob is that the leaves at the bottom turn yellow, easy to fall off, and gradually expand upward.

In severe cases, it may also become a dead cause. In addition, the new leaves on the top of some carobs sometimes turn yellow, often accompanied by fallen flowers. In addition, some carob plants will not die, but the leaf veins of the plants are yellowed, which affects the yield and quality of carob.

The deficiency of trace elements will also lead to the death of yellow leaves of carob. When the top leaves of the bean appear yellowish-white, it is usually caused by iron and zinc deficiency, and the new leaves at the top turn yellow and suddenly clear when the shade is clear, and the root system of the bean is not growing well or the early plant bears too much fruit.

The death of celery seedlings is caused by the occurrence of soft rot, sclerotinia disease, black rot, cataplexy and blight due to the more rain in summer and autumn, coupled with the serious phenomenon of continuous cropping in various places. Soft rot begins with a tender and juicy petiole and initially appears water-soaked and forms light brown spindle-shaped or irregularly shaped depressed spots.

If the red roots of celery seedlings die, it may be due to overwatering, resulting in syncycosis, soft rot, black rot, etc., or it may not do a good job of ventilation, celery seedlings are dense, and it may also be a lack of nitrogen fertilizer.

No timely watering, no timely fertilization, improper care, no pest control, no spraying of pesticides.

Summary. Hello, it is celery black rot: occurs near the surface of the rhizome and petiole base, and sometimes also damages the roots. The diseased part turns black and rots, and many small black spots grow on it. The growth of the plant is stagnant, and the outer 1-2 layers of leaves fall off due to base decay.

Celery seedlings have the phenomenon of blackening of taproot and dead seedlings, what should be done and what is going on.

Hello, it is celery black rot: occurs near the surface of the rhizome and petiole base, and sometimes also damages the roots. The sick department became teased which black mountain skin code rotted, and many small black spots grew on it. The growth of the plant is stagnant, and the outer 1-2 layers of leaves fall off due to the decay of the base.

In the occurrence of black rot, sclerotinia sclerotinia disease, blight and cataplexy, you can use 50 Pythium 600 times solution, 50 iprodione attack 600 times solution, 50 carbendazim 500 times solution, 50 old ethylene sclerotium 1000 times solution, 65 methylmycophine 1000-1500 times solution, with one of the above agents, once every 7-10 days, spray 2 times.