Symptoms, causes and preventive measures of celery convulsions
Celery is the most common vegetable in people's daily life, and the celery has fewer pests and diseases. In the process of planting, it is basically not sprayed. It only needs enough water and fat celery to grow green and vigorous. . However, some farmers have recently reported that celery has convulsions, especially spring celery, which has led to a serious decline in the edible value and commercial value of celery. So why does celery have convulsions? How to prevent it?
1, the symptoms of celery convulsions
Spring celery (regardless of open field cultivation or cultivation in protected areas, whether live or nursed for transplanting), before the product matures, the plant grows flower buds, which reduces the commerciality. This phenomenon is called pre-extraction.
2, the reason for celery convulsions
(1) Seedlings pass the vernalization stage
When the celery seedlings have 2-4 leaves, they encounter a low temperature below 10'C, and if the low temperature weather lasts for 10-15 days, the celery seedlings will pass the vernalization stage. When the celery encounters long-term sunshine or high temperature conditions again, the plant will twitch and flower. The longer the seedlings are at low temperatures, the higher the pumping rate.
(2) Variety and seed problems
When planters use seeds, if they use weak winter varieties, or use old seeds, or under-filled seeds, there may be convulsions.
(3) Poor management
When the growers manage the seedlings, if the seedlings are excessive, or because the water and fertilizer supply is insufficient, or the growth of the plants is too poor, or the pests and diseases are damaged, the convulsions of the celery plants will be aggravated.
3, preventive measures for celery convulsions
(1) Choosing the right variety
Choose varieties that are strong in winter (that is, strict requirements for vernalization conditions), or plant varieties with strong vegetative growth.
(2) Select high quality seeds 
For example, if you choose a new seed with full grain, it is best to pick the seeds from the autumn seedlings in the spring to the spring of the League.
(3) Avoid low temperature vernalization
In winter and spring, when there are 2-4 pieces of seedlings, 8-9 pieces of seedlings after planting, and 30-40cm of plant height, care should be taken to avoid the low temperature environment below 10 °C or the low temperature. The number of days that last.
(4) Promote plant vegetative growth
Maintain proper temperature after planting. Strengthen water and fertilizer management, pay attention to the prevention and control of pests and diseases, promote the normal growth of seedlings, and inhibit reproductive growth (twitching and flowering). During the growth of spring celery, seedlings cannot be carried out, but the fertilizer and water should be spurred, water should be properly watered to keep the ground moist, and nitrogen fertilizer is often applied. Adequate water and fertilizer conditions can promote the vegetative growth of plants, inhibit reproductive growth, and slow down the phenomenon of early convulsions.
(5) Spraying gibberellin solution
Spray gibberellin solution at appropriate time to promote vegetative growth of plants.
(6) Harvesting at the right time
If the celery grows with flower buds, the whole plant can be harvested when the stem is 10 cm high. Or use the eucalyptus harvest method to reduce the risk of early convulsions, and not to harvest when the sputum is old.
The above are the symptoms, causes and preventive measures of celery celery convulsions. Farmers must pay attention to this phenomenon when planting celery. If not prevented in time, it will affect the yield and quality of celery and reduce planting efficiency.
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