What are the causes of cucumber drops? How can I prevent it?

The appearance of too many female flowers in the greenhouse spring cucumber is due to the planting of aging seedlings, or the concentration of ethephon treatment in the seedling period, the temperature difference between day and night is too large after the seedlings are slow, the night temperature is low, and the water control is too heavy, which is prone to weak plant growth, more female flowers, dense melon yards, and slow growth of melon strips. In this case, fast-acting nitrogen fertilizer should be applied immediately, irrigation should be large, the temperature should be increased, no ventilation or light wind should be ventilated during the day, and timely harvesting should be carried out, so as to thin out too many female flowers, inhibit reproductive growth, and promote vegetative growth. The greenhouse has fewer spring cucumbers and melons, which is due to the high greenhouse temperature, small temperature difference between day and night, and more nitrogen fertilizer.

Sufficient water, vigorous vegetative growth, and inhibited reproductive growth, resulting in large leaves, long internodes, thicker stems, less melon strips, and slow growth of melon strips. In the event of this phenomenon, watering should be controlled, ventilation should be strengthened, night temperature should be reduced, the temperature difference between day and night should be increased, and the harvest should be appropriately delayed, so that it can turn to reproductive growth. For plants that grow too vigorously, methods such as bending the faucet downwards can also be used.

In short: vegetative growth or reproductive growth is too abundant, and the purpose of high yield and high quality cannot be achieved, only through physical measures such as water and fertilizer management, temperature and humidity method, and other physical measures such as persuasion and slippery regulation. Achieve high yield and high quality.

<>Cucumber is a kind of vegetable that people like to see. In daily life, there are many people who eat cucumbers. It can be used both for cooking and eating raw as fruit, and even many beauty lovers use it to make **.

The autumn cucumber we know is the most suitable for raw consumption of all cucumbers, and it is generally marketed in autumn every year. But some autumn cucumbers only grow vine seedlings and do not bear melons, why is this?

In general, autumn cucumber planting management is highly related to weather, temperature, soil and variety. It is necessary to have a comprehensive understanding of the growth habits and characteristics of cucumbers, and adopt targeted agricultural management measures to improve the probability of cucumber receiving melons and increase the yield of cucumbers.

One of the main reasons why autumn cucumbers do not bear melons is that cucumbers grow in vain. In view of this situation, first of all, we must control the temperature to avoid the temperature being too high or too low, especially the temperature at night, which is generally between 1 2 and 18 degrees. Moreover, it is necessary to control water and fertilizer reasonably, do not use too much nitrogenous fertilizer, and increase phosphorus and potassium fertilizer appropriately.

Even in certain cases, biofertilizers are used rationally to regulate.

Of course, if necessary, you can also spray some foliar fertilizer, use chitosan, chitin, etc. to adjust the growth of cucumbers, avoid overgrowth, and increase the nutrient supply of cucumber fruits. In addition, when cucumbers bloom in autumn, it is necessary to increase the use of potassium fertilizer, which can improve the flowering and fruit setting rate of cucumbers, and promote more cucumber fruit.

There are many reasons for cucumber fruit dropping: one is that there is no pollination, there are few male flowers or no male flowers, and fruit setting drugs need to be sprayed, the second is that cucumber seedlings are also prone to fruit drop due to drought, the third is that the temperature is too low and easy to drop fruits, and the fourth is that too many melon leaves are vigorously applied with nitrogen fertilizer urea, and the effect of wind and light transmission is poor, and it is easy to drop fruits.

Too much watering, too much watering, too many times of watering, and serious soil water accumulation, so that the water required by the root system is not coordinated, resulting in excessive vegetative growth, weak reproductive growth, and poor flower bud differentiation resulting in flower drop. Insufficient fertilizer and light, poor light transmittance of greenhouse film, when encountering alternating cold and warm airflow, cloudy days, insufficient light, resulting in reduced photosynthesis, less nutrient accumulation, insufficient organic matter, poor flower bud differentiation, cucumber fruit drop.

<> planting time is generally in March and April every year, usually the temperature can reach 5 degrees Celsius at night, and the temperature can be planted at about 18 degrees during the day. Due to the poor light transmittance of the greenhouse film, when encountering alternating cold and warm airflows, cloudy days, insufficient light, windy and dusty situations, coupled with the grass curtain early cover and late opening, resulting in less photosynthetic products manufactured by vegetables, insufficient organic matter, poor differentiation of flower buds, and flower and fruit drops.

The seedbed fertilizer used for seedlings can not be too much, especially not on chemical fertilizer, to use only a small amount of calcium phosphate or heavy superphosphate or fully decomposed organic fertilizer. Cultivation measures, such as controlling the age of seedlings, planting in time, reasonable dense planting, strengthening ventilation and light transmission and pest control, timely pruning, vine management, erection, harvesting, top dressing, etc. As a result, the branches and leaves of the cucumber plant grow wildly, and the branching ability of the cucumber plant is affected.

Not branching or too few branches too weak can cause cucumbers to have only male flowers but not female flowers.

If too much fertilizer is applied, the cucumber plant grows, the leaves are dense, and the vegetative growth is vigorous, which will inhibit reproductive growth, and there is not enough nutrition for the plant, and the flowers will not produce cucumbers. Therefore, in the flowering and fruiting period, it is necessary to apply less nitrogen fertilizer and supplement phosphorus and potassium fertilizer to promote cucumber melon formation. For aphids, attracting insects for pollination, or artificially assisted pollination.

For insect pests such as thrips, you can choose insecticide sprays such as thiamethoxam and dinotefuran. For leaf mites and tea yellow mites, avermectin plus pyridoxin spray can be selected.

If the temperature is too high or too low, it will affect the pollination and fertilization of flowers, resulting in flower drop and deformed short and thick melon. Too much or insufficient nitrogen fertilizer or lack of phosphorus and potassium, and the incoordination of various nutrients will make flowers and fruits cause cucumber flowers and fruits to fall due to their nutrient deficiency or nutritional disorders. If the cucumber lacks soil during the growing season, it is easy to cause the formation of separation, resulting in short and thick fruit drop.

If the temperature is too high or too low, it will affect the pollination and fertilization of the flowers, resulting in the appearance of deformed melons. Too much or insufficient nitrogen fertilizer or lack of phosphorus and potassium, and various nutrients are not coordinated, which will cause melons and fruits to fall flowers and fruits due to nutrient insufficiency or nutritional disorders.

The temperature is too high or too low, which affects the pollination and fertilization of the flowering period, resulting in falling melons and deformed short and coarse melons, and various nutrients are not coordinated, so that flowers and fruits cause nutrient deficiency or nutritional disorders, which will also become the cause.

Cucumber is relatively easy to plant a kind of cucumber, the planting time is generally in March and April every year, usually the temperature can reach 5 degrees Celsius at night, and the temperature can be planted at about 18 degrees during the day. Warm, not tolerant to cold, can be cultivated in all parts of our country, mainly greenhouse or plastic greenhouse cultivation and open field cultivation of two kinds, of which the majority of them are planted in protected areas, in the growth management of cucumbers, there are vegetable farmers who respond that cucumbers have not yet reached the season of ripe picking, and will come out.

<> insufficient light and insufficient light, resulting in the reduction of photosynthetic efficiency, less product accumulation caused by falling, due to the poor light transmittance of the shed film, when encountering alternating cold and warm airflow, cloudy days, insufficient light, windy and dusty situation, coupled with the grass curtain early cover and late opening, resulting in the temperature during the vegetable seedling raising period can not be too low, the seedling crops encounter a short period of low temperature may cause the seedlings to bloom in the later growth process through vernalization (started the flowering program), lose the cultivation significance. If you encounter a short period of cooling weather, be sure to control the fruit setting part and the number of fruits per plant. The part of fruit set and the number of fruit set must be considered according to the characteristics of the variety, the growth of the plant, the climatic conditions at that time, etc., and cannot be generalized, but it must be clear that the part of the fruit set and the number of fruit set should be based on the plant.

As the saying goes, Mizuna Mizuna can't be separated from water. Cucumber is a vegetable with a very high water content, generally 96% to 98% water content, so it should be watered in time during the growing season. In the cucumber fruiting period, it is generally necessary to ensure that it is watered once every two or three days in summer, and the reasons for keeping enough content in the soil to cause the hollowness of cucumbers are:

1. Malnutrition, poor fertility of the soil, no timely topdressing, insufficient nutrition, unable to meet the nutrient needs of plant growth. As a result, the cucumber plant grows weakly and the root system grows poorly, resulting in the hollowing of the cucumber.

3-4 weeks after the flowering of cucumbers, it is the enlarged young embryos that fall out. Mostly due to incomplete fertilization, the development of the embryo is hindered, the young fruit lacks the hormone of the embryo, or due to the rainy weather during the flowering period, which affects pollination, or the lack of oxygen during the flowering period, the young embryo lacks protein **, and stops developing, which can cause flower drop. At this stage, Kao No. 3 solution should be sprayed to regulate the relationship between vegetative growth and reproductive growth, which is an effective method for flower fall caused by incomplete development of pistil.

It is necessary to increase the application of phosphorus and potassium fertilizer and micro fertilizer according to the different varieties and growth of vegetables, and the reasonable formula of fertilization is required to balance the best nutrition and achieve the balance of vegetative growth and reproductive growth of vegetables. For vegetables with excessive stem and leaf growth, the amount of top dressing can be appropriately reduced, and the amount of nitrogen fertilizer can be controlled in particular. Do not water before and after a large number of flowers, sit down and water the young fruits according to the moisture after the flowers are gone, and ventilate in time after watering to reduce the humidity in the shed and prevent the occurrence of diseases.

Cucumber flower and fruit drop is caused by a lack of nutrients or water. It is best to alleviate this situation by properly applying water and fertilizing the lai. If you want to have a high yield of cucumbers, you must grow them scientifically.

It may be caused by uneven pollination or incomplete fertilization of cucumbers in the process of pollination and fertilization. Like this year's Dragon Boat Festival is a little too much water, floods have occurred in many places, rainy weather for many days, cucumbers absorb more water, evaporation is small, but after the rain is too clear, in the conditions of high temperature and strong light caused by a sudden increase in moisture, and the root system due to the large soil moisture content to prevent cucumbers from appearing curved melon, to ensure sufficient light. Appropriate plant spacing, but be careful not to pick too many leaves to ensure enough leaves to produce nutrients.

Environmental impact: Weather reasons will also cause the appearance of curved melons, such as cloudy days for a few days and then suddenly sunny, then in the case of high temperatures, the whole melon strips will be balanced, resulting in curved melons. The cucumber pollination process is incomplete, or the process is completed, but the fertilization process is incomplete, and it may be because the dry matter synthesis of the cucumber after fertilization is reduced, and the nutrient distribution is uneven, resulting in "bending" melon.

Insufficient fertility, insufficient or unreasonable nutrient supply is one of the important reasons for the appearance of crooked or deformed melons, cucumbers produce more melons, require a large amount of fertilizer, and the shortage of a large number of elements and medium and micro elements will cause poor growth, which directly affects the yield not to mention the quality of melons. If you want to plant a second crop of cucumbers, the yield is often low, and the cucumbers are more curved. We know that the growth of vegetables is generally carried out at night, and the temperature at night is too high, which will affect the growth of vegetables.

Ventilation and increased application of foliar fertilizer, cucumber bending should be improved.

<> the external environmental conditions are uncomfortable, if it suddenly clears on a cloudy day, the high temperature and strong light cause the lack of moisture and nutrients. Pest and disease damage, such as melon strips infected with scab, will bend from the lesion. If one or more of these elements are missing or the supply is unbalanced, the growth of cucumbers will be affected.

Especially during the cucumber setting period, the specific manifestation of nutrient deficiency or element imbalance is the appearance of "bent" cucumbers.

The reason for cucumber and crooked gourd, the temperature of cucumber flowering is too high or boron deficiency, resulting in unbalanced development of melon strips, when the cucumber is drought, the amount of watering is too large or the watering is not timely, it is easy to cause curved gourd and melon; The prevention and control methods include strengthening greenhouse temperature management, balanced fertilization, and reasonable watering.

Environmental factors, bad weather, rainy and rainy caused by insufficient light, easy to cause curlough, too high temperature, easy to cause curlough soil factors, poor soil, poor permeability leads to poor root development, premature leaf aging, easy to cause curlough management factors, nutrients are insufficient, resulting in fertilizer deficiency during the fertilizer period, especially potassium, boron, phosphorus, or partial nitrogen fertilizer, over-application of chicken, pig, cow manure, are easy to cause curlough, too much leaf picking will also damage nutrients, causing curlough.

There are several reasons for cucumber curcumber: Excessive and premature leaf picking. Too much fruit per plant in the early stage.

The ovary is too small at the time of flowering, resulting in insufficient nutrients later on. Long-fruited cucumber should not be used properly in the fruit expansion period. The results were normal at first, but later the nutrients could not be supplied in time.

Long-fruited cucumbers encounter leaf obstruction during the expansion stage. High temperatures cause potassium and boron deficiencies. Excessive or single use of nitrogen fertilizer or chicken manure, pig and cow manure, insufficient potassium fertilizer and phosphorus fertilizer, etc.

Prevention and control methods of cucumber and curcumber: 1. It is to water frequently, but the amount of watering should be less each time, and the watering interval should not be too long during the high temperature period. 2. The yield of a single plant can not be too high, too high a single plant yield will increase the burden of the plant, too many melons in the early stage or not picking melons in time, the leaves will age quickly, which will easily lead to cucumber bending.

3. Don't remove the bottom leaves too early and too much. The yield of cucumbers mainly depends on the photosynthesis of the leaves, as long as the bottom leaves do not turn yellow, generally do not remove them too early. 4. Remove the curved gourd that has occurred in time, or use small stones or small bricks to fall to the bottom to make it straight.

In addition, foliar spraying of compound microbial fertilizer 200 times, spraying once every 7 days, spraying 2 3 times, has a good control effect on the production of curved melon, sharp melon, and potbelly melon.