In the greenhouse cucumber production in winter, there are many kinds of physiological diseases of cucumber fruits, including curving melons, thin-shouldered melons, frozen melons, and big-nip-tip melons. This phenomenon not only degrades the yield and quality of cucumbers but also results in poor commercial quality and can cause significant economic losses in production. Therefore, growers should master the techniques to control cucumber catastrophes and reduce production losses.

First, form the cause. 1. Bent melons. When the inflorescence begins to develop, it suffers from continuous yin weather, persistent low temperature, lack of light, lack of nutrients and moisture, which causes the growth tendency of cucumber seedlings, which may lead to bending when young larvae are formed, or excess nutrient water due to high temperature management, causing stems. Leaves grow lush, even if the plants are growing normally, if a node sitting too many melons will form a curved melon. 2. Zombies. After the seedlings are irrigated, the first water is poured too early, the seedlings grow too prosperous, the nutrients are transferred to the reproductive growth, and the melon strips stop growing prematurely after formation; when the melon strips are swollen, the water is not sufficient, and partial application of nitrogen fertilizer or potassium fertilizer; Under high temperature and dry conditions, there is a serious shortage of water and fertilizers, more spraying times, premature aging of plants, and the formation of frozen fruit. 3. Thin waist melon. Unbalanced supply of nutrients, continuous high temperature drying, or lack of supply of boron before flowering and sitting on melon, or transport of boron to melons is inhibited. 4. Taper sharp mouth melon. Female flowers suffer from poor pollination, and some of the nutrients that form seeds are bloated, and some of the seeds that do not form seed have less nutrients and do not grow. If the melon strips are insufficiently supplied or the watering is too late before the enlargement, the bellies are likely to appear.

Second, prevention and control measures. Check the digestive grounds early and early after the flower from the female flowers to check, once removed, timely removal, so as not to affect the normal growth of the upper fruit.

1. Adjust the temperature and humidity and lighting. Strictly follow the four-stage temperature change measures of cucumber growth and development to control temperature and humidity, and strive to meet the temperature and humidity requirements for the growth and development of cucumber at various stages to prevent premature aging; when the weather is poor and the light is insufficient, artificial light supplement measures must be taken; When vines and vines fall, it is necessary to prevent vines from being pulled; the old leaves and diseased leaves without growth function are removed to ensure that the plants grow robustly.

2. Formulated fertilization. From Shiji Fei, it is necessary to use organic manure as the main fertilizer, and apply 15,000 kilograms of high-quality farmyard fertilizer per acre and 300 kilograms of oil residue, and apply fertilizer at a ratio of N, P and K 5:2:6. Mushi 120 kg or so is appropriate, and in the fruit setting period of additional boron fertilizer.

3. Pest control. The symptomatic application of the disease after the occurrence of pests and diseases. The concentration of spraying should be appropriate, the frequency should not be too much, should be sprayed on the second day after the spraying of foliar fertilizer, the amount of 0.2% of potassium dihydrogen phosphate + 0.2% of urea + 0.1% of the ternary compound fertilizer +0.2% white sugar + vinegar to increase the plant's resistance to stress and prevent premature aging.

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