How to prevent and cure celery rot

Celery, alias celery, early celery, celery, parsley, celery, wild coriander, celery for umbelliferae in a, biennial herbs. Originated in the Mediterranean coast of the swamp, the world has been widely cultivated. Celery cultivation in China began in Han Dynasty and has a history of more than 2000 years. At first, it was only planted as an ornamental plant, and then it was eaten. After continuous domestication and cultivation, it formed a slender petiole celery cultivar, namely Benqin (Chinese celery). This celery is widely distributed in China, and Zunhua in Hebei, Weixian and Huantai in Shandong, Shangqiu in Henan, Jining in Inner Mongolia and other places are famous for celery production.

Morphological Characteristics of Celery

Stems: Herbs, 5 - 15 cm high, creeping stems, stalked, slender stems, creeping on the ground, rooting.

Leaves: Perennial leaves fleshy, subround or reniform, with V-shaped notches, 2 - 3 cm long, 1.8 - 2.5 cm wide, 5 - 7 lobed at margin, obtusely serrate, lobed approximately equal to serration depth, base cordate, palmate veins 7 - 9, leaf surface sparsely hispidulous; petiole 5 - 15 cm long, densely pilose on stalk; stipules membranous, apex obtusely primitive or lobed, 0.1 - 0.2 cm long.

Flowers: Flowers are umbels, scattered in the axils of walking stems, peduncle longer than petiole, 5 - 15 cm long, pilose; umbels have 18 - 26 flowers, densely forming spherical heads; pedicels are very short, 0.1 - 0.15 cm long, pedicels have membranous, ovate or obovate involucral bracts at base; calyx teeth are absent; petals 5, acuminate, white or milky white; styles are rolled inward when young, outward recurved after flowering, base raised. The flowering period is from April to November.

Fruit: fruit is free from fruit, 0.12~0.15 cm long, 0.1~0.12 wide, oblate, base cordate, smooth, often yellow brown after maturity, middle rib and dorsal rib prominent, fruit top has two antenna-like styles.

How to prevent celery rot?

Celery soft rot, also known as rot disease, rot disease, is a bacterial soil-borne disease, generally in the middle and late growth of ridge shade, wet ground easy to occur.

The pathogen mainly overwinters in the soil, spreads through insects, operations, rain or irrigation water, etc., invades from the wound, and after the disease occurs, it can spread through rain or irrigation water. The appropriate temperature for the disease is 25-30℃, the rain is too much or the watering is too frequent, the humidity is high, and the disease is frequent. Many wounds, continuous cropping, low-lying land, poorly drained land, heavy disease.

The prevention and control measures of celery rot disease are as follows:

1) Rotation for more than two years. Choose disease-resistant varieties, disease-free soil seedlings.

2) Avoid root injury, do not cultivate soil too high, pay attention to drainage in rainy season, water as little as possible or stop watering during the disease period. Once the diseased plants are found, they should be removed in time, and the diseased acupoints should be disinfected with 1:20 times formalin or replaced with foreign soil. Some lime can also be sprinkled to disinfect the soil.

3) Sowing seeds after seed dressing with agricultural anti-751 powder or Fengling soluble powder according to 1% of seed weight, or mixing 200g seeds with 15ml of 2% agricultural anti-751 aqueous solution 100 times, drying and sowing.

4) In the sowing furrow, 5kg of 2% agricultural antibiotic 751 aqueous solution or 1kg of Fengling soluble powder and 50kg of water are evenly applied to the furrow of one mu of land.

5) 500g Fengling soluble powder and 50kg water are added to irrigate roots and petioles and bases at seedling stage, or 2- 3kg agricultural antibiotic 751 water solution is added with water per mu during watering.

6) In the early stage of disease, agricultural streptomycin or neophytomycin 100-150ppm solution can be sprayed once every 7 days, and continuously sprayed 2-3 times. 400-500 times solution of 30% DT WP or 600 times solution of 95% CT fungicide or 600-800 times solution of 77% KCD WP or 700 times solution of 70% Dixon WP can also be used to spray plants and irrigate root neck, and then spray irrigation once after 10 days.