What should I do if the cucumber seedlings and persimmon seedlings are all yellowed after the insect

It shows that this field is not suitable for insect tablets, and it should be dug out in time, disinfect the soil, and water the yellowed leaves in time to wash away the impact of insect tablets. Anfago can also be administered to alleviate the situation.

How to care for cucumbers.

1.Temperature: Cucumbers like a warm growing environment, the normal growth temperature is between 20 degrees and 32 degrees, not lower than 15 degrees, to avoid frostbite, high temperature should also be paid attention to, try not to exceed 35 degrees, otherwise it is easy to burn the branches and leaves, and the cucumber will also be dehydrated.

2.Watering: cucumbers during the growth period need sufficient water, which can promote the growth and development of seedlings, watering once every three days, and not more watering during flowering to prevent excessive watering and frequent flowering of plants.

3.Fertilization: Before planting, it is necessary to apply sufficient basal fertilizer, which is conducive to the growth of seedlings, and at the same time, during the growth period, the water-soluble fertilizer of the fertile leaves can be applied many times, and the manure of the animal can also be topdressed, which can improve the yield and enhance the immunity of the plant.

How do you use this insect repellent tablet? Is it sticking to cucumber seedlings, or is it hanging somewhere in your garden? Cucumber seedlings are very immature, persimmon seedlings are also very immature, your medicine is too strong, a little bit will cause them to die, so it seems that you can't use this kind of insect repellent in this vegetable garden!

Reason 1: Changes in the external environment, sudden changes in temperature, humidity and light will cause cucumber leaves to turn yellow.

Solution: Cucumber is a typical thermophilic plant, with a fertility temperature of 10 32. The suitable temperature is higher during the day, about 25 32, and the lower temperature at night, about 15 18.

The appropriate temperature for photosynthesis is 25 32. It is necessary to adjust the temperature of the greenhouse in a timely manner, such as ventilating.

Reason 2: Excessive watering, too much water leads to yellowing of cucumber leaves (water yellow): The leaves of the plant are generally yellow, especially the top leaves are small, the growth is slow, and wilting occurs in severe cases.

Solution: The appropriate soil relative humidity is 85%-90%, cucumber has a strong adaptability to air humidity, and the relative humidity of the air at night can reach 90%-100%, but the humidity is too high and prone to disease, so it is not possible to water cucumber seedlings many times, so as to prevent the root system from growing normally due to excessive water and lack of oxygen.

Reason 3: Too much fertilization, although cucumber planting has a lot of nutrient demand, but it is not possible to arbitrarily increase the amount of fertilizer, too much nutrients will cause excess nutrients in cucumber plants, causing yellow leaves.

SolutionCucumber fertilization should be carried out according to different growth stages, in the middle and late stages of balanced and high potassium fertilizer-based, the seedling stage is generally topdressing once or twice, and the middle and late stages can be applied once at an interval of 10-15 days to meet the nutrient needs, the fast-acting water-soluble fertilizer is faster than the traditional fertilizer absorption, and the yield is obvious, of course, the bottom fertilizer before planting cucumbers is essential.

Reason 4 cucumber deficiency, cucumber demand for trace elements is also a lot, such as magnesium, boron, iron, zinc, calcium, etc., if a large shortage of these elements will reduce the quality of cucumber plants, fruits, etc., for this in the middle and late topdressing process should also take into account the supplement of trace elements.

Solution: Spray cucumber special foliar fertilizer to comprehensively supplement nutrients, improve the quality of cucumber plants and cucumbers, and enhance the resistance to common diseases.

Cause 5 pests and diseases, the symptoms of which mostly occur on the leaves of the cucumber growth point, resulting in yellow-green mottled flowers and leaves.

Solution: The occurrence of cucumber diseases and insect pests will turn the leaves yellow together, and fungicides can be added to it at the same time as daily spraying of foliar fertilizer, so as to kill two birds with one stone and treat the disease at the same time.

Generally speaking, planting cucumbers in a suitable environment, scientific and reasonable bottom fertilizer plus top dressing is an important method to promote cucumber straightening, elongation, top flowers with thorns, standardized planting and scientific management is the most efficient way to increase the yield of greenhouse vegetable crops.

The cucumber trees are weak and the leaves are yellow, what's going on?

The middle and lower leaves are yellow, and most of the missing elements are the elements that are easy to be reused in the plant, such as nitrogen, potassium, magnesium, zinc, etc. It is the growth of the whole plant that is inhibited, and the whole leaf of the older leaves lacks green first, which is nitrogen deficiency. The control countermeasure is to apply 1% urea solution 3 times.

The second is that there is no obvious inhibition of the growth of the whole plant, the leaf veins lose green and turn yellow, the leaf edge is green, or there are green spots remaining, not curled, and it is magnesium deficiency.

Irrigate the roots twice with Oxazalin and Sheler, 3-5 days apart.

This may be cucumber blight or sclerotinia and the method of differentiation: only white hair is blight, and there are white hairs and sclerotinia sclerotinia sclerotinia s The commonly used fungicides for the prevention and control of epidemic diseases are:

60% Baitai; 64% alum; downy mildew; 72% Clu; 69% Anker; 58% Redomir or Gionee mold killing 500-800 times and other liquid medicines, respectively, mixed with "Tianda-2116" 800 times + silicone 2000 times liquid, carefully sprayed, every 7-7 days 1 time, continuous spraying 2-3 times. The above pesticides are used alternately, and the root irrigation and smearing of diseased plants have a better effect.

The commonly used fungicides for the prevention and control of sclerotinia are: 50% Kaiser water dispersant; 40% Scarlett; 50% Sukrin; 50% promethein or sclerotia net 500-1

500 times and other medicinal solutions were mixed with 800 times of "Tianda-2116" + 2000 times of organic silicon, carefully sprayed and smeared on the diseased part, once every 7-10 days, and sprayed 2-3 times continuously.

Green vegetables are a kind of green food, which refers to the pesticide residues left in vegetables after the use of pesticides in the production process are lower than the national or international standards. Therefore, "green products" are relative, not absolute, and the evaluation of "green products" also depends on some other indicators: such as the pollution of the environment, soil and groundwater in the production process of "green products", and the energy conservation of energy; "Green products" are safe and healthy for people and have no damage to the environment during use.

Pesticides can be used for green vegetables, but they must use pollution-free pesticides with low toxicity and low residues.

You can use different pesticides to control cucumber diseases and insect pests according to the specific situation, and you can also use insect nets, insect trap lights, poisonous bait, etc.

Cucumber insect pests include aphids, yellow gourds, red leaf mites, tea yellow mites, etc.

Whiteflies and aphids can be controlled by trapping adults with yellow plates; 10% chlorphanyl emulsifiable concentrate 1000 times, or 10% net 4000-6000 times liquid, or 25% Actai 3500 times liquid, when spraying, add an appropriate amount of laundry detergent to the medicine to increase the adhesion of the liquid medicine on the pests, and the control effect is better.

The control of spotted submarine flies can be sprayed with 25% chlorpyramide No. 3 2000 times.

The best way to control root-knot nematodes is to stuffy the shed at high temperatures.

Prevention and control of yellow gourd.

Mesh cover method uses screen window cloth (new and old screen cloth can be) to make a mesh cover to cover melon seedlings, press it with soil blocks under the net cover, and try not to leave a gap in contact with the ground to avoid the serious harm of yellow gourd to melon seedlings. When the seedlings are grown, remove the net cover and fold it for storage in the next year. For young melon seedlings, when the dew is not dry in the morning, sprinkle plant ash on the melon seedlings to ward off the adults of the yellow melon.

Artificial capture method In April, melon seedlings are generally small and should not be controlled with chemical pesticides. Because after taking the drug, it can only last for 1 2 days, and on the third day, the adult worms fly again, and they have to be medicated again. Such frequent use of drugs will cause pesticide damage to melon seedlings and increase production costs.

Therefore, they can be caught in the early morning before the dew dries, when the adult is less active, or during the day with an insect net. Drug flooding method can be used chemical pesticides to repel adult insects, pesticides do not contact seedlings, not only will not make melon seedlings produce pesticide damage, but also can prevent and control the adults of yellow gourd, to achieve the purpose of seedling protection. Method:

Dip a wooden stick or bamboo stick wrapped with gauze or cotton balls into a pesticide with a low dilution factor, and insert the gauze or cotton ball dipped in the pesticide next to the melon seedlings with one end facing up, one for each stick, pay attention to the same height as the melon seedlings or slightly lower. After the medicine on the gauze or cotton ball is dry, dip the pesticide and insert it back into its original place. Pesticides can be selected with Nongdile 20 30 times and cypermethrin microemulsion 50 times.

Dipping pesticides are used alternately to repel insects.

Prepare a certain proportion of chili water, or dilute expired milk by a certain number and spray it to have a certain effect.

Summary. Hello, first of all, cucumber seedlings, cucumber root system, high yield, belongs to weak fertility absorption, fertilizer needs, high requirements for soil conditions of vegetables. Only by applying more organic fertilizer can we grow well, enhance disease resistance, and achieve the purpose of high yield.

What should I do if I put too many cucumber seedlings, tomato seedlings, pepper seedlings, cabbage seedlings, and carob seedlings in slow-release fertilizer.

This question is up to me, it takes a little time to type, so please be patient.

Hello, first of all, cucumber seedlings, cucumber root system, high yield, belongs to weak fertility absorption, fertilizer needs, high requirements for soil search conditions of vegetables. Only by applying more reed leakage organic fertilizer can the defect grow well, enhance disease resistance, and achieve the purpose of high yield.

Then, tomato seedlings, to be properly watered, the fertilizer diluted, generally need to be watered 3 times in a row, so that the fertilizer dissolves in the soil as soon as possible, and reduces the concentration of fertilizer, which is conducive to the absorption of tomato cracks. If it is a solar greenhouse, do not let the temperature be too high, and loosen the soil. Ventilation of the tomato to trap the spine to avoid the emergence of high temperature release of ammonia to hurt the seedlings.

Pepper seedlings, 15 to 20 days before planting, combined with watering and flushing a small amount of urea, to promote the growth of seedlings, the amount can not be too much, to prevent seedlings from growing.

All land, cabbage, persimmons, cucumbers, beans, peppers.

What do you need to do?

Do you understand the first few questions?

Cabbage seedlings, cabbage planting process, not easy to be infected with diseases, disgusted to reduce the frequency of spraying in the later stage, so that the mold can be cultivated to help the growth of cabbage, pay attention to fertilizer and water when management, Qin Zhonghui to apply foot fertilizer, and then top dressing.

Before planting, there was a lot of fertilizer in the field, and now the crops are planted in the ground. It's not long.

I'm not asking you before the seedlings, I'm asking what to do after the seedlings are planted.

I know, have all the seedlings been planted?

Now the seedlings are all in the ground. How to remedy it.

Hello, watering in the morning, the amount can not be too much, 2-4 days watering is appropriate, continuous dilution, scouring the harmful substances around the root system, to avoid aggravation of root injury.

As long as it's not serious, it's fine for a while, and you don't have to worry too much.

Just watering is fine, don't you need to pop some pesticides, or flush some pesticides.

Do not use pesticides. Then some pesticide seedlings will die directly.

Watering is fine, this is normal, we also have a lot of them here, this is the case in my house, watering in the morning.