The planted pumpkin has silver leaf disease, what harm will it cause to the pumpkin?

Pumpkin is one of the most common crops in our country, Shandong people call pumpkin papaya, Hebei people call pumpkin, pumpkin likes drought, deeply loved by consumers, so pumpkin is planted all over the country, February - March is the spring sowing season of pumpkin, 90 days after the main meal can be harvested. In the previous sentence, we talked about the basic skills of planting pumpkins: selecting the land, raising seedlings, and planting.

Today we delve into pumpkin seedlings and management, these two stages are very important. Related to the yield of pumpkins, in order to cope with the needs from time to time, the friends hurry up and write notes, and now we go straight to the topic.

First, choose a sapling. About half a month after the pumpkin seeds are officially eaten, the pumpkin sapling digs the soil, and the pumpkin sapling grows three leaves, so we have to select the sapling. There are often about three saplings growing in a hole, so integrate the seedlings.

It's not that pumpkin saplings can be planted. These saplings also have technical requirements, and the saplings cannot be blindly integrated. The first is to "look", to see the growth of the seedlings, leaving the seedlings that look strong, and the others can be removed, and the removal force should not be too large, and it should be integrated and formalized.

There should be at least 2 pumpkin seedlings per blood, and no more than 4 seedlings.

2. Management. The day-to-day management of pumpkins is inseparable from pests, fertilizers, flooding, diseases, weeding, etc. These things have been accustomed to in the heart of the farmer uncle, who can be said to be the best "doctor" of crops.

Today, let's talk about what problems and solutions may arise in the daily management of pumpkins. Vermin. Because plants experience different degrees of insect pests, and crops are also plants, pests have become a "habit" in crops.

Because many insect pests are regional, it is also easy to control them. Pest infestations can lead to reduced pumpkin yields, and more seriously, they can directly lead to the death of pumpkin seedlings.

The most common pest we encounter in the south can be said to be the ground tiger, which can bite off the roots of seedlings and cause them to die, spraying poisoned milk to prevent it. The second is the maple leaf spider, the maple leaf spider, every year in June and July is the most active time for the red spider, mainly attached to the surface of the pumpkin leaves, so that the pumpkin wilts, when encountering the red spider, you can use leaf mite webs, anchovy shrimp for prevention.

Revise. Pumpkins should be topdressed at least 3 times until the harvest is harvested. Poor land will increase the number of top dressing, fertilization is directly related to whether pumpkin seedlings can thrive, and it will also affect the yield of pumpkin, so fertilization is the key.

The first batch of fertilizer can be given about 10 days after the main meal. This time it will be fine to apply a thin nitrogen fertilizer. After entering the flowering period, a second fertilizer can be applied, and corroded organic fertilizer can be applied, mainly phosphorus and potassium fertilizer.

Pumpkins can be used as a third fertilizer, mainly farmhouse fertilizer. 3. Soak in water.

Severe immersion can cause the roots of pumpkin seedlings to rot. The right way to do this is to try to choose some land when choosing a plantation. This helps with natural drainage, and in the case of level ground, ditches are dug in advance of the pumpkin plantation for drainage.

Disease. Pumpkin is a relatively disease-resistant crop, but it is not disease-free. The disease will directly cause the pumpkin to wilt, and it is not a serious infection that the pumpkin planted will wilt.

At the beginning of the disease, blotchy white spots appear on both sides of the veins or at the tips of leaves, and the veins at the front of some leaves become white and reticulate. After the disease is damaged to a certain extent, the lesions spread to the entire leaf surface, and the front of the whole leaf seems to be coated with a silvery-white film, which can reflect light. The mesophyll under the silvery epidermis of the leaf and the back of the leaf were observed, and the color was normal.

The surface of the leaf appears to have a layer of wax, which is thickened and stiff, and the petioles of vines, heart leaves and functional petioles are green and slightly translucent. The chlorophyll content of leaves decreases, photosynthesis is seriously hindered, plant growth is slowed down, and diseased plants do not produce melons or cause melons. After the onset of the disease, young melons and commercial melons have yellow and green spots and lose their commercial value.

Silver leaf disease is an important disease of pumpkin, which occurs widely. Once it happens, it will soon form a large area of surface damage, affecting the yield. The growth of the victim pumpkin plants was weak, the plant type was short, the leaves drooped, the leaves at the growth point were shrunk, the semi-stagnant state, the upper end of the stem was shortened, and the stem, young leaves and functional petioles were greened.

First, watering too wet is easy to cause pumpkin leaves to turn yellow, the main reason is that the symptoms of yellowing of leaves caused by root rot caused by moisture, it is best to water less usually, not too wet, do a good job of watering after drying, do not dry and do not water is conducive to the normal growth of the root system, when watering too wet, you can use loosening tools to properly loosen the pot soil can reduce the discharge of water in the pot is conducive to the normal growth of the root system, reduce the appearance of yellow leaves.

Second, the potted pumpkin has not been loosened for a long time, resulting in the hardening of the potting soil, the water after watering should not be absorbed by the potting soil, but flows out from the side of the pot, the potting soil is too dry for a long time, resulting in the root system can not absorb water, and the leaves are yellow and dry.

Third, the symptoms of yellow leaf dryness caused by excessive fertilization, usually fertilization should be carried out according to the amount of fertilization, the amount of fertilizer is too heavy to cause the leaves to burn yellow and dry down, when the excessive fertilization can be replaced by one-third of the pot soil, and then watered thoroughly to reduce the harm of fertilizer, such as buried organic fertilizer can be dug up to reduce the harm of fertilizer.

Pumpkin leaf yellows can be caused by lack of light, overwatering, or pests and diseases. If there is a lack of light, increase the amount of light and let it bask in the sun. If you water too much, reduce the amount of water and ventilate the soil more.

If it is infected with pests and diseases, it is necessary to spray and treat it in time, and the specific use of drugs and dosage should be carried out in accordance with the instructions.

Pumpkin Growing Techniques:

1. Land selection and land preparation.

Pumpkin has a strong drought resistance, but the requirements for water are stricter, and the water can not be too much, so when selecting the land, we should pay attention to choosing the land with better drainage and irrigation on higher terrain, and can not be planted in the soil that is easy to accumulate water and water is not easy to discharge, and finally an appropriate amount of Cuim water-soluble fertilizer can also be applied to the soil.

2. Seeding technology.

The technology of pumpkin high yield generally adopts the method of multi-plant parallelization, that is, when the pumpkin seedlings grow to about fifty or sixty centimeters, the main seedling tip of the adjacent two seedlings is cut off with a knife, and then the two seedlings with the tip cut off are tied tightly, and new seedlings will grow after two or three days.

3. Field management.

When the melon seedlings grow up to about two meters, we should remove the top of the melon vine in time, so that it will grow more vines, which is conducive to improving the yield.

4. Disease prognosis.

Pumpkin usually has fewer symptoms, the most common is powdery mildew, but its harm is very large, it will directly affect the growth of pumpkin, resulting in poor quality of pumpkin, so to carry out in time, we generally use spraying powder rust Ning emulsifiable concentrate 2000 times, % agricultural resistance 120 water agent 200 times liquid or spraying bacteria special 1500 times solution.

This is pumpkin wilt disease, pumpkin seedling stage, vine extension stage, fruiting stage will occur this disease, pumpkin flowering fruit setter and fruit expansion period for the peak period of this disease, the typical symptom is wilting.

In the early stage of the disease, root irrigation can be used with medicinal solution, carbendazim or 25% benzelat wettable powder.

Prevention and control methods: 1. Soil treatment: the soil is deeply turned, and the heavy stubble field is exchanged with the ditch removal method, and the medicinal soil is applied to the sowing hole for soil disinfection. Seedling soil should be selected non-vegetable land, non-melon field soil, fertilizer with nutrient soil, good use of nutrient bowl seedlings, seedling survival rate is high.

Second, the implementation of crop rotation: with non-cucurbitaceae crops for crop rotation, can also implement water and dry field rotation, melon field should be selected as far as possible neutral or slightly alkaline sandy loam planting.

3. Strengthen cultivation management: level the land before sowing, apply enough rotted high-quality organic fertilizer as base fertilizer, irrigate the bottom water, sow early in a timely manner, should master the seedling period less watering, the growth period according to the seedling conditions using trickle watering, it is strictly forbidden to flood irrigation, string irrigation, and the water in the field should be discharged in time.

Nitrogen, phosphorus and potassium fertilizer should be reasonably matched or applied melon special fertilizer, spraying foliar fertilizer can enhance plant disease resistance, it is recommended to apply Hai and Weihai Dianwo potassium dihydrogen phosphate, fast dissolution, high absorption and utilization rate. Reasonable pruning and pruning to prevent excessive wounds to reduce the invasion of pathogens in the soil.

For rust and frost, first apply two or three fungicides to the symptoms to see the recovery effect, and if it doesn't work, spray it with foliar fertilizer.

Its main hazard is the deformation of the fruit. The most important thing about pumpkin is to have an elephant, which must look good, at least in line with the relevant shape of the pumpkin. If the pumpkin planted becomes deformed, concave and convex, then such a pumpkin is generally unpopular in the market, and everyone will not choose this kind of pumpkin when buying.

Judging people by appearance, taking things by appearance, has already formed an inertial consensus, we have to buy pumpkins to buy looks like pumpkins, we want to buy watermelons to look like watermelons, if you want to buy a pumpkin, the result grows into a bitter gourd, I think many people will feel nondescript, they will definitely refuse to buy such pumpkins, so once there is this bridge eggplant virus disease, then it will lead to fruit deformation, which will directly affect the economic benefits of growers. After all, it doesn't look good, and it can't be sold at a good price. <>

The virus also affects leaf deformation. There are two types of pumpkins that can be sold, one is pumpkin seedlings and the other is pumpkin. This virus will cause the leaves of pumpkin to deform, some will curl, some will be irregular, if you want to pick melon seedlings to sell, then for this kind of deformed melon seedlings is basically no one wants to buy.

Because there is more than one pumpkin seedling on the market, it is natural to choose to sell better under the same ** same sticky stupid piece, even if the deformed melon seedlings are sold cheaper, people may not accept it, after all, buy this kind of noodles back, and worry about being laughed at by others. <>

Because many people pay attention to this appearance when buying vegetables, they will feel that they have lost face if they don't look good, and for growers, the deformed melon seedlings will also affect their income, after all, they can't sell much when they are sold.

You can choose to use some pesticides for treatment, but it is best to use fungicides together when preventing and controlling, because if we can kill some bacteria while killing insects, then we will naturally get twice the result with half the effort.

Mostly black rot! The disease can occur from near ripeness to storage. When the disease occurs in the field, the symptoms are mostly manifested close to the ground.

Side. The symptoms vary depending on the pumpkin variety, and in some varieties, the lesions are lighter, bronze-colored, irregularly shaped, and slightly raised. In some varieties, it is manifested as reddish-brown spots, and gradually turns grayish-white, and there are rings on the lesions in the early stage of the disease, spraying 50 thiophanate-methyl wettable powder 800 times solution plus 75 chlorothalonil wet.

800 times of sex powder, or 800 times of 50 carbendazim wettable powder plus 800 times of 75 chlorothalonil wettable powder, or 500 times of 36 thiophanate-methyl suspension, or 80 times of anthrax Fumei wettable powder, or 2 antimycomycin water 200 times, or 2 wuyimin water 150 times, every 7 10 days, 2 3 times of continuous control.

Pumpkin is one of our common crops, its adaptability, disease resistance is stronger, and the damage of pests and diseases is less, but with the development of a series of products, it has also promoted its planting area to a certain extent. This also provides favorable conditions for the occurrence of diseases, which occur more frequently year by year, so, what are the common diseases of pumpkin? How to prevent common diseases of pumpkin?

Let's find out together.

1. Pumpkin blight.

The disease mainly harms the seedlings, stems, leaves and fruits of pumpkin, and the brown disease appears in the diseased part in the early stage of the disease, and spreads rapidly when the air humidity is large, and the soft rot area in the form of water stains appears, and white mold appears around the diseased part, which then causes the fruit to wilt and rot or the plant to rot and die.

Control method: choose plants in higher terrain, loose soil and well-drained areas, and use wheat or corn as crop rotation. The disease mainly adopts prevention and control methods, disinfection and sterilization of seeds and soil before planting, and strengthening management to control temperature and humidity.

2. Pumpkin powdery mildew.

Powdery mildew mainly harms the stems and leaves of pumpkin, the leaves appear white dots at the beginning of the disease, slowly spread, the disease gradually expands, and the good disease is covered with a layer of white powder, resulting in yellowing and death of the leaves.

Prevention and control methods: select varieties with strong growth and strong disease resistance, strengthen fertilizer and water management, enhance the disease resistance of plants, disinfect before planting, isolate the infection of pathogens, and spray carbendazim wettable powder or chlorothalonil in the early stage of the disease.

3. Pumpkin anthracnose.

Anthrax mainly harms leaves and fruits, and the leaves appear water-stained when they occur, and then spread into brown diseases, and pink sticky substances appear at high temperature and high humidity; When the fruit is infected, it is also water-stained, which gradually expands, and the lesion becomes black and rotten.

Prevention and control methods: Seed dressing and disinfection with Fumei double wettable powder to eliminate the germs carried by the seed epidermis, and it is recommended to rotate crops such as corn and wheat to reduce the occurrence of diseases. At the onset of the disease, spray with chlorothalonil wettable powder or mancozeb, spray once every other week, and then 2-3 times in a row.

4. Pumpkin downy mildew.

Downy mildew is one of the main diseases of pumpkin, mainly affecting the leaves, when the leaves appear water-soaked yellow spots, gradually spread, and then lead to the formation of yellow-brown irregular polygonal disease on the leaves. In a humid environment, the disease will grow gray-black mold, and when the disease is severe, the entire planting field will be yellow.

Prevention and control methods: downy mildew prevention is the main thing, choose varieties with strong disease resistance, and use carbendazim wettable powder dressing and disinfection treatment during planting to strengthen field management and enhance plant disease resistance. Strictly control the temperature, strengthen the ventilation conditions, and use chlorothalonil, carbendazim and other agents to spray for chemical control.