How to prevent and control celery diseases in winter greenhouses? A detailed guide to practical methods

Thanks to the continuous promotion of greenhouse cultivation techniques, we can eat most vegetables even in the cold winter, and celery is one of them. Because greenhouse planting keeps vegetables in a warm, enclosed state most of the time, it also provides a good growing environment for many pests and diseases. Today, Qinnong Web will introduce to you the relevant content on the prevention and control of celery diseases in winter greenhouses.

The diseases that celery in winter greenhouses is relatively prone to mainly include celery heart rot, hollow stem, plant splitting, stem cracking, and so on. Next, Qinnong Web will introduce one by one the causes of these diseases and the related prevention and control methods.

1. Celery heart rot

Heart rot is often caused by applying too much nitrogen fertilizer and potassium fertilizer, while at the same time the temperature inside the greenhouse is too low and the air is dry, which causes boron absorption to be hindered. In the early stage of the disease, leaf edge rot occurs, and along with the occurrence of heart rot, the plant will also show some symptoms of calcium deficiency, and this will lead to necrosis of the young and tender tissues in the growing point of the plant.

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

2. Celery hollow stem

The appearance of hollow symptoms is mainly due to insufficient or excessive fertilizer, and low temperature and dryness are also important causes. If gibberellin is applied at this time, it will further aggravate the appearance of the celery hollow stem phenomenon.

Prevention and control methods: apply sufficient base fertilizer, irrigate in time, keep warm and protect against cold, and use little or no gibberellin.

3. Celery plant splitting

Plant splitting is mainly caused by adopting some cultivation methods that inhibit growth in the early growth stage and then promoting growth in the later stage, which leads to rapid expansion of the plant. Symptoms: as the plant grows and develops, longitudinal cracking appears at the base of the petioles of the outer leaves at the stem base.

Prevention and control methods: pay attention to adopting methods that promote growth throughout the entire plant growth period, and do not adopt inhibitory methods.

4. Celery stem cracking

Stem cracking of the plant is mainly caused by interference with the plant's absorption of boron. This phenomenon mainly occurs on the outer leaves.

Prevention and control methods: apply a 0.1% borax aqueous solution for foliar topdressing or apply a small amount of borax to the soil.

5. Celery leaf edge rot

This symptom has a certain relationship with heart rot and is mainly caused by calcium deficiency in the plant.

Prevention and control methods: apply sufficient base fertilizer.

The above is the prevention and control of common celery diseases in winter compiled by Qinnong Web. In addition, when the winter temperature drops below 0°C, celery is prone to freezing damage. If the petiole tissues suffer freezing damage, the damaged parts cannot recover even if the temperature rises again. Therefore, when planting celery in winter, relevant heat preservation measures must also be taken.