What should I do if the cucumber flower is topped? Are there any measures to solve it?

We all know that cucumbers are not cold-tolerant, but they are also not resistant to high temperatures, the most suitable temperature for growth is 25 32, 37 or more will not adapt, growth will be inhibited, higher than 48 will be bad, there will be a problem, you will have a flower top disease. In particular, the so-called flower topping, that is, the top of the cucumber near the growth point of the section or a few sections shortened, pumping and refusing to grow, resulting in the female and male flowers are not clear, are crowded together, like a cluster of flowers, the heart leaves at the head of the dragon can not grow, twitching and dripping, even the leaves with flowers are squeezed.

<> topping of cucumber flowers is mainly manifested by the aggregation of flower clusters at the top growth point, losing the apical dominance and stopping growth. Observing the cucumber seedlings, it can be seen that the top leaves become smaller, the color is dark green, the color is dirty and not bright, and it looks as if it has lost water and wilted. The cucumber is said to have been brought back to the Central Plains by Zhang Qian's envoy to the Western Regions during the Western Han Dynasty, so it is also called courgette.

Cucumber is rich in cucurbitacin, which has the effect of improving human immune function, and cucumber can also prolong life and anti-aging. The glucosides and fructose in cucumbers can lower blood sugar.

Cucumber is a temperature-loving vegetable, but it is not resistant to high temperatures, and above 37 will inhibit the growth of the plant. If the soil is dry at this time, and the temperature in the shed is too high, the elongation of the cells at the growth point will be blocked, resulting in flowers, young leaves, etc. clustered together, causing the flower to top the cucumber flower top The performance of the top cucumber flower is that the cucumber seedling tip gathers a family of cucumber female flowers and young melons. Cucumber plants have shortened stem nodes, thick leaf veins, short and thick claws, and curly dragon whiskers.

In severe cases, the cucumber tip faucet stops growing, the leaves are aging and wilting, and the young melon appears to turn into a melon. If we find in the field that the growing point at the top of the cucumber no longer grows, and the length of the internodes near the growing point is shortened, the plant is short, no longer forms new leaves, the small leaves are densely clustered, and male and female flower clusters are formed around it. And when the cucumber appears to be topped, the plant will grow extremely slowly, the distance between the nodes is short, there will be a lot of male flowers around the growth point, and the leaf axils will grow small melon buttons, so that the top will appear capped, and in this case, the new leaves will grow slowly.

Prevention from the breed. Because of the low temperature and weak sunlight in winter and early spring, it is easy to have the problem of "flower topping". Therefore, when planting cucumbers with late autumn stubble, overwintering stubble, and early spring stubble, it is recommended that you try to choose cucumber varieties with good low temperature tolerance, strong weak light tolerance, and good stress resistance.

The so-called flower topping is, cucumber seedlings growth is sluggish, basically stagnant, the growth point is clustered, the internodes are shortened, and the cucumber flower topping will seriously affect the yield. The prevention of cucumber flower topping should be based on heating and insulation, and the light time should be extended as much as possible in management, or the use of fill lights should be used to increase the temperature in the shed, and the cover outside the shed should be increased at night to strengthen the insulation. It is necessary to apply fertilizer and water reasonably, avoid fertilizer root burning and flood irrigation, ensure the healthy growth of plants, and prevent the occurrence of cucumber flower topping.

Mainly to increase temperature and heat preservation, in the management to extend the light time as much as possible, or the use of the role of supplemental light, improve the temperature in the shed, at night to increase the degree of coverage outside the shed, strengthen the insulation, to be reasonable and reasonable application of chemical fertilizers, to avoid fertilizer root burning and water irrigation, to take measures to increase the nutrition of cucumbers, in the melon period to adjust the balance of cucumber plant vegetative growth and reproductive growth.

<> topping of cucumber flowers is a common physiological disorder in the production of cucumber in sheds, which is usually manifested by shortening of the internodes near the growing point, and the appearance of dioecious flower clusters without heart leaf formation, which are in the shape of flowers holding heads. Flower topping mostly occurs in the early stage of fruiting, which has a great impact on the yield and quality of cucumbers.

The reason for the formation of cucumber flower topping.

Low ground temperature, drought, insufficient nutrients and other reasons cause the phenomenon of flower topping, if not timely measures, it will seriously affect the yield. Due to the different causes of the occurrence, the symptoms of the plant are also different. The symptoms of flower topping caused by low ground temperature and drought were similar.

That is, the leaf color is dark green, the leaves are small, the internodes are short, and the root system is underdeveloped. The flower topping produced by insufficient nutrition mostly appears in the middle and late stages of plant growth, and the leaf color is light and thin.

The best way to top cucumber flowers.

On the one hand, pay attention to proper watering to prevent root hair shrinkage and affect elongation; On the other hand, it is necessary to implement the principle of high temperature melon raising, the temperature can be higher during the day, even if it exceeds 35, do not rush to release the wind, so that more heat can accumulate in the shed. Don't stick to the so-called right temperature for growing vegetables30.

Chemical treatment method for topping cucumber flowers.

Cucumber chemical control technology is also ideal, cucumber planting slow seedlings with l0mg kg gibberellin spraying the whole plant, serious can add spraying rooting powder or spraying cold and drought resistance gram early cold 400 times liquid. In addition, it is necessary to be forward-looking in the production and management of cucumbers, apply nitrogen, phosphorus and potassium compound fertilizers in advance, and cooperate with the application of foliar fertilizers based on urea and potassium dihydrogen phosphate.

When sowing seedlings, choose low-temperature tolerant varieties with fast germination, rapid emergence and fast seedling growth. In early spring, late autumn or winter when cultivated in protected areas, the cucumber seeds that are about to germinate after soaking are refrigerated for 24-36 hours in a 0 environment for sowing.

Cucumbers with mulching seedlings should be strengthened at night 4-5 days before unmasking. As long as it is a sunny day, the membrane should be gradually removed at night, and gradually removed from small to large. At the same time of low-temperature exercise, dry seedlings and squatting seedlings are carried out.

Use well-rotted farmhouse manure. When planting in the northern region in spring, the weather should be warmed up after the cold air, and the cucumber seedlings should be guaranteed to be slow down when the next cold snap hits. In the southern region, it is best to choose sunny days for more than 3 consecutive days for planting.

For cucumbers planted in winter sheds, in addition to using non-dripping film and covering with curtains, you can choose to cover with plastic film to avoid cucumber low temperature barriers. Do less ventilation in the early stage, timely and appropriate amount of ventilation in the middle stage, and control the temperature of the shed at 25-30 during the day and 18-20 at night.

If the flower topping phenomenon occurs, the cucumber tip and leaf surface can be sprayed with potassium dihydrogen phosphate solution, and the new leaves can be seen in 7-10 days. Spray 500 times of 47% Garinone WP or 5000 times of neophytomycin to kill ice nucleus bacteria, help prevent cucumbers from having low temperature barriers, and avoid the occurrence of flower topping.

Cucumber flower topping, also known as flower hugging, mostly occurs in early spring, late autumn and winter in the open field cultivation or in the process of planting in protected areas. The key factor is that cucumber is harmed by low temperature and temperature, resulting in low temperature growth and development disorders, and poor soil moisture content and nutrient content standards are cucumber low temperature obstacles, that is, cucumber flower topping boosting standards. The topping of cucumber flowers is manifested by the clustering of top buds, the loss of apical buds, and the termination of growth and development.

Observing the cucumber seedlings, it can be seen that the top leaf surface is reduced, the color is dark green, the color is not bright, and it looks as if it is withered due to lack of water. The stem nodes around the bud eye were significantly reduced, there were many small melons in the heart leaf flesh, but no new shoots were produced, and many cucumber pistils and male flower clusters were crowded together, resulting in the top of the seedlings from top to top.

The environmental temperature in the shed is too low during the period when the cucumber plant is in full bloom, and the plant growth is retarded, especially when the soil temperature is too low, the growth and development of plant roots is hindered, the absorption capacity is weakened, and the supply of nutrients is insufficient, resulting in the "flower topping" situation of cucumber plants. The temperature difference between day and night is too large, especially when the night temperature is too low and less than 10 for a long time, the organic compounds generated by plant photosynthesis in cucumber plants in the broad daytime are transported to the top of the plant slowly, the air supply is reduced, the amount of nutrients transported at the regeneration position is small, the vegetative growth of plants is inhibited, and the growth and development of the reproductive system exceeds the vegetative growth.

The ambient temperature in the greenhouse is too low, the plant has less water, the water holding capacity in the field is too high, the wrong operation of growth hormone, and the excessive use of fertilizer are all caused by the occurrence of cucumber "flower topping" situation, in the daily natural environment to prevent the above situation, if the cucumber has occurred "flower topping", it is necessary to immediately promote the normal growth and development of cucumber plants according to the measures of cutting melon buttons, spraying leaf fertilizer and naphthalene acetic acid, applying fast-acting base fertilizer and naphthalene acetic acid with watering, and raising the ambient temperature in the shed. Cucumber is a fruit and vegetable that likes warm branches, but it is not heat-tolerant, and above 37 will inhibit the growth of the plant.

If the soil layer is drought at this time, and the environmental temperature in the shed is too high, it will cause the somatic cells of the bud eye to be blocked, and then cause the petals, young leaves, etc. to grow together, resulting in no flowers and topping. Cucumber is a shallow rhizome crop, the function of digesting and absorbing water and fertilizer is weak, but the growth period of cucumber is long, coupled with the high production volume, so in the cucumber fertilizer, everyone attaches great importance to it, and will top dressing fertilizer many times to improve efficiency and quality. However, excessive fertilizer also causes an increase in the salinity of the soil layer, which harms the growth and development of rhizomes.

If the watering cannot keep up, the rhizome of the cucumber will produce wilted roots, which will hinder the transport of water, and the leading part of the plant will be lanceolate, resulting in flower topping.

Mainly because cucumbers suffer from low temperature weather, when sowing rock-destroying seedlings, choose low-temperature tolerant varieties with peel or hair holding buds that emerge quickly, seedlings grow quickly, cover seedlings, and use fully rotted farm fertilizer; If it is found that the flower topping phenomenon occurs, you can use potassium dihydrogen phosphate solution to spray the cucumber tip and foliage, or neophytomycin 5500 times.

Be sure to water in time, top dressing in time, and increase light in time, and you can choose to cover the mulch.