Prevention and Control of celery Diseases in greenhouse in Winter

Due to the continuous promotion of greenhouse cultivation technology, even in the cold winter, we can eat most vegetables, celery is also one of them. As the greenhouse planting makes vegetables in a warm and closed state most of the time, it also provides a good growth environment for many diseases and insect pests. Today, the pro-agricultural network will introduce to you the relevant contents about the prevention and control of celery diseases in winter greenhouse.

The diseases of celery in winter greenhouse are mainly celery heart rot, hollow heart disease, plant crack, stem crack and so on. Next, the pro-agricultural network will introduce the causes of these diseases and related prevention and control methods.

1. Celery heart rot

Heart rot is often caused by the application of too much nitrogen and potassium fertilizer, low temperature in the greenhouse and dry air, which hinders the absorption of boron. At the initial stage of the disease, there will be leaf edge rot, and with the occurrence of heart rot, the plant will also show some symptoms of calcium deficiency, which will lead to the necrosis of young tissue in the growing point of the plant.

Prevention and control methods: apply more organic fertilizer, control the temperature in the greenhouse, and do not control water too much at the same time.

Second, celery hollow

The occurrence of hollow symptoms is mainly due to insufficient or excess fertilizer, while low temperature and dryness is also an important reason. If gibberellin is applied at this time, the hollow phenomenon of celery will be further aggravated.

Prevention and treatment methods: apply sufficient base fertilizer, timely irrigation, keep warm and prevent cold, use less or prohibit gibberellin.

Third, celery plant crack

Plant cracking is mainly caused by some cultivation methods of inhibiting growth in the early growth stage and promoting growth in the later stage, which leads to the rapid expansion of the plant. Symptoms: with the growth and development of the plant, the petiole base of the outer leaf at the base of the stem appeared longitudinal cracking.

Control methods: pay attention to the whole plant growth period should take the method of promoting growth, but can not take the method of inhibition.

Fourth, celery stem split

The stem crack of the plant is mainly caused by the interference of boron absorption by the plant. This phenomenon mainly occurs in the outer lobe.

Control method: apply 0.1% borax aqueous solution for foliar topdressing or apply a small amount of borax in the soil.

5. Celery leaf edge rot

This symptom has something to do with heart rot, mainly caused by calcium deficiency in plants.

Prevention and cure method: apply sufficient base fertilizer.

The above is the prevention and control of common diseases of celery in winter. In addition, celery is easy to be frozen when the temperature is below 0 ℃ in winter. If the petiole tissue is frozen, even if the temperature rises, the damaged part can not be restored, so planting celery in winter must also do a good job in relevant heat preservation measures.