In the early stage of cucumber seedling growth, do you need to spray pesticides to control pests and

In the early stage of cucumber seedling growth, do you need to spray pesticides to control pests and diseases?

Cucumber seedlings should not be too much, the soil moisture is 60-70%, so they are more afraid of rain, and the soil moisture needs to be controlled. Cucumbers have a high yield and a large water requirement. The suitable soil moisture is 60-90%, the water at the seedling stage should not be too much, the soil moisture is 60-70%, and sufficient water must be supplied at the fruiting stage, and the soil moisture is 80-90%.

The suitable air relative humidity of cucumber is 60-90%, and excessive air relative humidity is easy to develop diseases and cause yield reduction.

a. Cucumber seedlings have poor pesticide resistance and are prone to pesticide damage, so special caution should be exercised when spraying pesticides during this period. Once the pesticide damage occurs, the abnormality will first be manifested from the leaves. The main manifestations are that the leaf margins are dry or yellowed, and the leaves lose green, first the affected parts of the pesticide initially show green loss, and then the whole leaf turns yellow, whites and scorchs.

Excessive drug concentration damages the young leaves of cucumbers, so that the leaf edge tissue is damaged and the leaves are shrunken and deformed.

Cucumber is a common vegetable in our daily life, which is delicious and nutritious, and is loved by people. In the process of cucumber planting, it is inevitable that some diseases will attack, among which cucumber seedling stage cotyledons.

b. Cucumber cotyledon diseases are mostly caused by seed carriers. The disease first produces lesions on the cotyledons, but the symptoms vary depending on the pathogen. The different symptoms and prevention and control of different cotyledon diseases are introduced as follows for reference.

The main cotyledon diseases at the cucumber seedling stage are anthracnose.

Vine blight, blight, sclerotinia sclerotinia disease, virus disease, downy mildew.

Wait. Cucumber anthracnose is the emergence of seeds, cotyledons have not yet begun to occur, often on the edge of the cotyledons appear light brown semicircular or irregularly shaped lesions, slightly sunken, high humidity long pink sticky silk.

c Broad hoe is harmful to spray in front of cucumber seedlings, and broad hoe is used to control broad-leaved weeds after budding, and the required dose is relatively low. Although pre-bud application of the agent also has some activity on sensitive dicotyledon weeds, the dose must be 2-10 times higher than the post-bud dose. The agent is ineffective against narrow-leaved or perennial weeds.

Need. Cucumber seedling disease is mainly prevention-oriented, generally 10-15 days to spray! Cucumber target spot disease mostly occurs in the peak stage of melon bearing, and warm and high humidity are conducive to the occurrence of the disease, so prevention is the main priority.

After the occurrence, it is recommended to spray and control with flupyramidamide oximestrobin or copper hydroxide or thiazolezinc or pyrazole naphthoxychlor azoxystrobin in time, once every 5-7 days, 2-3 times in a row to control the disease and restore normal growth, add brassinolide or triasanol, the effect is better.

Cucumber is one of the very common vegetables in our daily life, it is nutritious, delicious and delicious, and loved by people. In the process of cucumber cultivation, I personally do not think that there is a need to spray pesticides. Because the seedlings are very fragile in the early stage, they are not suitable for spraying pesticides if spraying at this time.

It will have a great impact on the seedlings.

No pesticide spraying is required. Because the seedlings are very fragile in the early stages, they are not suitable for spraying pesticides. Spraying can have a big impact on the seedlings.

Because the water content in the soil is too low, cucumber seedlings can not absorb sufficient water, cucumber seedlings absorb too much fertilizer, cucumber seedlings cell inner wall reverse osmosis, resulting in cucumber seedlings water loss, this phenomenon is generally caused by low water content in the soil or too much fertilization. Excessive nitrogen fertilizer for one-time use, especially urea, fertilizer with high nitrogen content, when applied, ammonia nitrogen fertilizer in the soil, at a higher temperature, a large amount of volatilization, urea contained in 2 urea, cucumber roots are very unsuitable, it will lead to, light aboveground part growth slow, leaf wilting, flower topping, old seedlings, etc., serious cases will lead to plant death root rot.

Chronic pesticide damage is after spraying, it takes a long time for obvious symptoms to appear, the symptoms are: leaf curl or drying, rapid whitening and aging of new leaves, white small necrotic spots between leaf veins, and even wilting and drying up of the whole plant. Chronic drug damage occurs mildly, which will delay growth, affect yield, and may cause failure in severe cases.

The pesticide damage can be eliminated by strengthening the management of fertilizer and water, and the fast-acting nitrogen fertilizer can be appropriately supplemented, or a large amount of clean water can be sprayed on the whole plant in time, which can promote the normal growth of the plant; If the leaves or plants are seriously damaged, irrigation should be carried out in time, phosphorus and potassium fertilizers should be increased, and cultivation should be cultivated to promote root development. The subject is to use nitrogen fertilizer ammonium bicarbonate too quickly after planting, so that the seedlings are burned. It's not a disease, it's just a mistake in operation, so that the seedlings are irreversibly dead.

Too much fertilization at one time will make the concentration of soil solution too high, which is greater than the concentration of plant cell solution, and plant cells will lose water, causing plants to wilt due to water loss; When the situation is more serious, it will cause the burning of seedlings After fertilization, watering can reduce the concentration of soil solution, and it is necessary to use layered application, the method of deep application of the whole layer is used to dig blindly, so as to achieve the fusion of soil and fertilizer, so that the fertilizer is evenly distributed in the entire tillage layer. At the same time, it is necessary to pay attention to proper watering of fertilization, keep the soil moist, reduce the concentration of the solution, and not cause fertilizer damage. Hope it helps.

It is not possible to use pesticides with particularly large sorghum strength, because the growth and development of cucumbers does not have particularly high requirements for the environment, so there is no need to use pesticides with particularly strong chemical strength.

Cucumbers can not be burned in some very corrosive pesticides, can not use some bactericidal pesticides, pants can not use light pesticides, because these pesticides are very harmful to cucumbers, and even cause the death of cucumber plants.

Can not use 666, DDT, dimethoate, dimethoate, amidophos, chloropicrin, dibromochloropropane, A Chinaki isosulfonate and so on. The lethality of these pesticides is very strong.

Cucumbers can not be planted with the medicine of the tung tree, there are hydroamidophos, chloropicrin, methyl phosphorus, methyl 1605, endogenous phosphorus, Sanhong chloricifol, hydroamidothion cover tan compound and so on.

The number of pesticides is too much, there is no sub-regional spraying, and there is no attention to the protection of plants, there is no focus on prevention, and the frequency of spraying is too high, these misunderstandings will affect the yield of cucumbers.

When planting cucumbers, it is necessary to take medicine to prevent diseases, but according to different diseases. Different drug sprays are to be applied. When spraying drugs, the most taboo is not choosing the right medicine to spray.

The second is that the time of medication is not right, which will also affect the growth of plants. Do not spray on rainy days. Don't add multiple doses at will.

Don't use the potion too often. Do not use pesticides in mixed proportions.

When it comes to the cultivation and management of vegetables, including cucumbers, many vegetable farmers now rely heavily on experience, as do medicines. Once a drug is found to be effective in controlling a pest or disease, they will believe in it. Even if it is dependent, when similar symptoms occur in the future, it is natural to think of using this drug, but this is a misunderstanding.

The choice of pesticides is not right, the time of medication is not right, increase the concentration of pesticides at will, often use drugs, and mix pesticides at will.

The frequency of spraying is too high, focusing on the protection of cucumbers, not paying attention to disease prevention, which has exceeded the scope of spraying, and the dose of spraying is too much.

It depends on what pesticides you need to use, whether it is to prevent diseases, insecticides, or growth hormones to promote growth.

In the cucumber seedling stage, some diseases often occur, such as cataplexy, blight, anthracnose, etc.; There are also some diseases transmitted through seeds and soil, such as blight, blight, sclerotinia sclerotinia disease, scab disease, vine blight and bacterial horn spot. Viral diseases also occur at the seedling stage, and they need to be prevented by applying pesticides as soon as possible; For fields where underground pests and nematode diseases often occur, some insecticides can be used when dressing seeds; Therefore, sowing and seedling are important periods for preventing pests and diseases, cultivating strong seedlings, and ensuring production.

For the seedling stage, it can be combined with land leveling, soil pesticide treatment, and these pesticides can be appropriately selected for the types of local common diseases. For example, per square meter, use 50% seed dressing double wettable powder 7g, 40% pentachloronitrobenzene powder 9g, 25% methacryl wettable powder 4g + 70% mancozeb wettable powder 5g, 25% methacryl wettable powder 8g + 50% Fumei double wettable powder 8g and other fine soil 4 5kg, after the seedbed is leveled and watered, the medicinal soil of 1 3 is sprinkled on the surface, and the remaining medicinal soil is covered on the seed after sowing, so that the upper and lower pads can give full play to the medicinal effect. For old vegetable areas, cucumber wilt, vine blight, anthracnose and other plots with heavier occurrences, you can also use 50% carbendazim wettable powder 8g + 25% methalin wettable powder 4g + 70% mancozeb wettable powder 5g, 70% thiophanate-methyl wettable powder 5g + 25% methamethalinate wettable powder 8g + 50% fumedi wettable powder 8g, 50% pythium wettable powder 5g + 25% methamethyl wettable powder 8g + 50% Fumei double wettable powder 8g, etc.

Seed and soil treatment can be carried out for seedling stage and direct seeding field, especially for plots with serious disease occurrence in old vegetable area, fungicides can be applied to prevent and control seed, soil-borne diseases and seedling diseases. When selecting the agent, it is necessary to target the characteristics of local perennial disease, and the agent that can be used is 50% carbendazim wettable powder 800 times liquid + 25% methalene wettable powder 800 times liquid + 50% Fumei double wettable powder 800 times solution, and you can also add 1000 2000 times of fulvic acid solution to the above agent, the effect is better, soak seeds for 30 50 minutes with these liquid medicines, and promote germination and sowing.

For the field where underground pests often occur, you can use 50% phosphine EC 25% quinthion EC 2000 times liquid soaking, for serious root-knot nematode disease, you can sow or plant, hole application or soil preparation when the soil is sprinkled with 10% benzene phosphorus granules, 5kg per mu, has a good effect.

In order to promote growth and enhance disease resistance, triasanol can also be mixed and sprayed, and 15g of guarin mixed with 6kg of water can be evenly sprayed on cucumbers in seedling and growth stages, and the effect is significant. Spraying 100mg kg of gibberellin at the 3 6 leaf stage can promote the formation of male flowers and reduce the node position. You can also spray some foliar fertilizers, such as plant protection, spraying Shibao, etc., in a reasonable way with insecticides, fungicides or use, you can receive good results.

What to spray on cucumbers.

Is pesticide good? What are the general diseases and insect pests that occur on cucumbers? What pesticides are used to control it? Therefore, what pesticides are sprayed on the inner cucumber, let us prescribe the right medicine, and we will achieve good results. The main prevention targets on cucumbers are blight, cataplexy, downy mildew, bacterial horn spot and anthracnose. Then the most effective preventive drugs for these diseases are chlorothalonil, ethylphosphine, agricultural streptomycin, etc.

Cucumbers can also be pests and diseases such as aphids, whiteflies, red (yellow) spiders (aka mites). For these pests and diseases, you can achieve good results with aphids and acaricides!

When spraying cucumbers, can you apply foliar fertilizer?

Regarding the problem of spraying foliar fertilizer on cucumbers, foliar fertilizer is one of the fertilizers needed for the growth of cucumbers.

Cucumber in the use of foliar fertilizer, for a lot of estrogen foliar fertilizer to use caution, the key is because the foliar fertilizer contains a large amount of growth hormone will cause plant senescence, reduce production and quality, in addition to the use of foliar fertilizer can be set in the melon maturity period, fill the cucumber plant needs nutrients.

In the ultra-low temperature season, if the bud eye is stagnant, it is necessary to spray foliar fertilizer immediately to promote the normal growth and development of cucumbers, and the weak rise of the plant occurs in the second half of the growth and development of cucumbers, so as to avoid the senescence of cucumber plants.

When cucumber uses foliar fertilizer, spraying should be symmetrical and delicate, leaf spraying fertilizer stipulates fine particulate matter, spraying symmetrical, pay attention to spraying the upper end of the leaf with abundant growth and development and the opposite side of the leaf, choose the appropriate spraying time, you can choose to carry out the temperature at dusk without wind entering the temperature, if it rains 3 hours after spraying, it will be sprayed once when it is sunny, but the draft should be appropriately reduced to pay attention to the concentration value.

Cucumber spraying foliar fertilizer has excellent effect, but not the more concentrated the effect is better, the concentration value of foliar fertilizer sprayed for cucumber is too high, easy to produce fertilizer damage, the concentration value is too low, can not have a good effect, to strictly control the spraying concentration value of foliar fertilizer.

It is also necessary to pay attention to the selection of foliar fertilizer, not to choose fertilizer with growth hormone, to choose foliar fertilizer with guaranteed quality, high yield and improve quality at the same time, you can spray foliar fertilizer to return to the mountain wind, concentrate on disease resistance, income generation, stress resistance, speed up and increase efficiency, grain crops dry yellow and quickly turn green leaves, improve the resistance of crops.

Containing large and medium nutrients, humic acid, brassin, auxin, amino acids, pyraclostrobin, plus green ecological light and carbon technology, it is not easy to cause residues, which can fill the fertilizer required for the growth and development of cucumber plants at the same time, so that cucumber can increase production and improve the quality of cucumber.

Regarding the precautions for the use of foliar fertilizer in cucumber and all the content of foliar fertilizer selection, many farmers should attach great importance to the application of cucumber foliar fertilizer and choose high-quality foliar fertilizer in order to make cucumber have a good income.