When applying cucumber medicine, should it be against the leaves or the fruit? Why?

Spraying method: When spraying cucumber foliar fertilizer, the nozzle is facing upwards, mainly spraying on the back of cucumber leaves to improve nutrient absorption. Foliar sprays are best done in the evening when there is no wind.

If there is rain 3 hours after spraying, it can be sprayed once on a sunny day, but the concentration should be appropriately reduced. In addition, the timing of spraying should also be appropriate. Under normal conditions, it is best to keep the leaves moist for 30-60 minutes.

Although the effect of foliar fertilizer is good and the effect is many, it is not that the more concentrated the better.

If the concentration is too high, it is easy to produce fertilizer damage, and if the concentration is too low, it can not play its due effect, so it is necessary to strictly control the spraying concentration of foliar fertilizer. Master the characteristics of foliar fertilizer and use it rationally. For example, chitin foliar fertilizer is easy to react with avermectin, so try not to mix it with pesticides when using; Potassium dihydrogen phosphate should not be mixed with reagents containing metal ions.

Foliar fertilizers containing metal ions should not be mixed with copper fungicides. The cultivation and management of vegetables, including cucumbers, now many farmers rely on experience and other medicines.

Once it is found that a certain drug has a good control effect on certain pests and diseases, you can trust and rely on this medicine, and for similar symptoms that appear in the future, you will naturally think of using this medicine, but this is a mystery. When spraying, start spraying from the lower leaves of cucumbers, and pay attention to the nozzle upwards, focusing on the bottom of the leaves, while for the front of the leaves, you do not need to focus on spraying, because from between the leaves of the plant to the front of the leaves. Pay attention to the number of leaves sprayed each time should not be too much, and it is best not to knock off the new leaves that come out of it, and for the leaves of cucumbers, pay attention to the wound by applying plant ash to disinfect.

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The spraying should be carried out on the leaves.

This depends on the choice of the part of the cucumber where the pesticide is used. "Prescribe the right medicine" is a word that people often say, and in the use of pesticides in cucumbers, it is also necessary to follow the principle of "prescribing the right medicine" to ensure that the effect of pesticides is fully exerted. Different pests and diseases have different characteristics, and the parts of the drug are not the same, such as in common diseases such as gray mold, blight, powdery mildew, etc., pesticides should be sprayed on the back of the leaves, if it is leaf blight, ring disease and other diseases, pesticides should be sprayed on the leaves.

Cucumbers should be sprayed on the leaves when spraying; Because this can allow the leaves to better absorb the effect of the drug, let the cucumber grow better, and avoid the cucumber with pesticides, so that the cucumber will be attached to the surface of the pesticide, which will affect the health of the human body.

The drug should be sprayed on the back of the leaf; Because this can effectively control insects, and it will not cause pollution to the fruit, if we spray the fruit with medicine, it will be harmful to our health.

It should be applied to the leaves, as the growth and size of the fruit may be affected if the fruit is sprayed.

The correct way to spray cucumber seedlings is to spray from the bottom of the leaves to the top, because when cucumber seedlings have pests and diseases, they are mostly under the leaves.

First, the maintenance method.

1. Temperature: cucumbers like a warm growth environment, the normal growth temperature is between 20 degrees and 32 degrees, low temperature can not be lower than 15 degrees, to avoid frostbite, high temperature should also be noted, try not to exceed 35 degrees, otherwise it is easy to be burned branches and leaves, so cucumbers will also be dehydrated, so winter breeding needs to be in the greenhouse.

2. Watering: cucumbers during the growth period need enough water, which can promote the growth and development of seedlings, watering almost every three days, and not watering more during flowering, to prevent excessive watering and frequent flowering of plants, so try to wait until the ground is all dry before watering, almost once every seven days.

3. Light: Cucumber does not have too high requirements for light, but it cannot stay in a dark environment all the time, it can accept full sunshine. There is no specific standard for a few hours of light every day, and strong light can be avoided in summer, and the gherkins that have just grown in the heart can be dried and wilted.

4. Fertilization: Before planting, it is necessary to apply sufficient base fertilizer, which can help the growth of seedlings, and at the same time can be topdressed many times during the growth period, mainly based on water-soluble fertilizer for fertile leaves, of course, animal manure is also available, which can improve the yield, increase the immunity of plants, and reduce the occurrence of some pests and diseases.

No. When spraying cucumbers, you can hit the diseased parts, not the leaves, which will affect the yield.

It should be right, because the leaves of cucumbers are easy to suffer when they are sick, and after applying pesticides to the leaves, cucumbers can be prevented from insect pests.

It should be directed against the leaves, as this can exert its medicinal effect and also play a role in preventing insect infestations.

Yes, many pests and diseases are on the back of cucumber leaves, so when spraying, be sure to hit the back of the leaves and spray.

Greenhouse cucumbers do not need to spray foliar fertilizer, reasonable use of fertilizer. Cucumber roots are shallow and weak, and high fertilization concentrations can cause root burning. Cucumber fertilizer should be applied sparingly. The topdressing time is generally controlled in the early stage, and cucumber fertilizer can be applied in the late growth stage.

Spray cucumbers with foliar fertilizer. At this stage, the temperature is low, the root system has poor vigor, and the ability to absorb nutrients is reduced. In order to meet the normal needs of melons, spraying fertilizer on the leaves can supplement the nutrients needed by the plants.

When the growth point of winter stops in the middle, Floliarfertilizer should be sprayed in time, which can activate the positive energy growth of plant ecology, expand the duct path of plants, improve the water absorption of plants and the absorption intensity of fertilizers, improve fruit yield and quality, reduce the rate of fruit decline, and reduce the occurrence of fruit cracking, induration and deformity.

Application of foliar fertilizer for cucumber in greenhouse and time to increase the application of organic fertilizer. Organic fertilizer can not only provide various nutrients for the growth and development of cucumbers, but also reduce soil bulk density, increase soil porosity, and improve soil physical and chemical properties. Therefore, organic fertilizer plays an important role in the continuous high yield, activation and soil improvement of cucumber.

Use a light film. It is a composite film that can improve the photosynthetic capacity of nutrients and chlorophyll, and improve the fertility, yield, color, leaf thickening and stem strength of advanced environmentally friendly plants. It can help plants absorb a large amount of light energy, light energy, light energy, compatible with conventional fertilizers, and maximize the supply of nutrients needed for plant growth and development.

One application is beneficial throughout the year.

Application and time of cucumber foliar fertilizer in greenhouse Foliar spraying of cucumber foliar fertilizer: use kincord silica foliar fertilizer, seedling stage: 30ml of golden code organic silicon foliar fertilizer to pour pots (30 kg of water), spray once in 7-10 days, spray 2 times.

Growth period: Kincord silica gel foliar fertilizer 50ml into a watering can (30 kg of water), spray once in 7-10 days, spray 4-6 times in a row. Long-acting effects:

Kincord silicone foliar fertilizer 80ml to a watering can (30 kg of water), spray once in 7-10 days, spray 3-4 times in a row. Application and timing of foliar fertilizer for cucumber in greenhouse.

Of course, you can get a good result and you can have a very good planting. You can get a good color ultrasound, and many farmers will do this, and the effect is really good.

Foliar fertilizer can be mixed with a little fertilizer, as this can increase the production of cucumbers, and it can also make cucumbers grow well, and it can also prevent cucumber pests and diseases.

No, this will cause the death of cucumbers, and it is not allowed to fertilize when spraying pesticides, which will cause seedlings to burn.

Aphids? Aphids are recommended to acetamiprid (the effect is not good at low temperature, the higher the temperature, the better the effect) or imidacloprid or thiamethoxam or dinotefuran or pymetrozine or thiamethrorid or dinotefuran and so on alternately, can also be mixed with high chlorine or bifenthrin or deltamethrin and other pyrethroid pesticides.

Protected areas can be combined with insecticidal aerosols such as isoprocarb.

These ingredients are safe and low in pesticide residues.

It is better to mix silicone additives all over the place.

Use pesticide ingredients alternately, and do not use the same pesticide ingredients consecutively. This is the principle of crop protection.