Why do grapes in the greenhouse get dirty?

The reason why the grapes in the greenhouse will be easily dirty is because there is often more rain in the greenhouse, and then the air inside it is not smooth, so it will cause the grapes to be dirty.

Although the grapes are in the greenhouse, there is also dust in the greenhouse, and it is normal for the grapes to have dust after a long time of dust precipitation.

Because there will be dust, dust will enter, of course, it will be very dirty, and this also depends on the hygiene of your own greenhouse, you should usually pay attention to the hygiene of the greenhouse.

Why do grapes in the greenhouse get dirty? The grapes in the greenhouse will also be dirty, because the air in the greenhouse will also contain dust, which will fall on the grapes when he lands.

The main reason for this is because there will be some dust in the greenhouse, and there will be some splashes when watering, so you must pay attention to this aspect.

Why are the grapes in the greenhouse dirty, it belongs to the outside in the greenhouse, if you want to say that you are caught, well, the pesticide or he is in the open place after all, so he must be polluted by ash and pesticides.

Because the greenhouse will not be completely sealed, there will be wind and dust, so it is normal to be dirty.

There is no such situation, there is a greenhouse to protect the grapes are very clean, if you say dirty refers to the hoarfrost on it, it is normal, the grapes are caused by natural growth, it means that it is very fresh.

Generally, no, unless it is caused by water, you usually pay more attention to it.

It may be because of some mud spots splashed on it during watering. Just wash it. It will not affect consumption.

Mainly because the pollen falls on the grapes, there is no wind and rain, rebrushing.

How can grapes in a greenhouse get dirty? There is generally no wind and sand in the greenhouse, and such grapes can't be drenched when it rains, so he shouldn't be dirty.

It is related to powdery mildew and other hazards.

Prevention: First, calcium supplementation should be given to calcium-deficient plots. Calcium fertilizers, such as potassium nitrate, not only prevent grape fruit cracking, but also increase glucose.

Foliar top dressing, such as potassium nitrate or potassium dihydrogen phosphate, can also be used. For acidic soils, such as plots below pH value 6, lime powder can also be sprinkled, which not only supplements calcium, but also has the effect of improving soil and sterilization.

: Grape powdery mildew: Powdery mildew is found in many wine-growing areas, but in general, the incidence is less frequent and milder in areas with more rain

Summary. First, it was unearthed too early.

For young trees buried in the soil to prevent cold, if they are unearthed too early, they are prone to frost damage when they encounter the cold of spring, resulting in the death of the main trunk. Some grapes are not buried in the soil to protect from the cold, and some are buried in the soil, but because the upper soil layer is too thin, they are also prone to death when they encounter severe frost damage.

2. Poor management.

Due to the poor management in the process of fertilization and growth in the previous year, especially in the autumn management, too much nitrogen fertilizer, less phosphorus and potassium, more irrigation in the growth period, slightly inadequate topping control, poor maturity of the main vine, weak drought resistance and cold resistance, and the phenomenon of dry and dead trees is easy to occur in the cold winter.

3. Climatic factors.

On the one hand, the climate is severely arid. Since last winter, there has been very little effective precipitation and dry weather, which is extremely unfavorable for the growth of fruit trees. In addition, due to the windy early spring, the temperature is unstable, and the temperature difference is large, resulting in the early activity of the grapes in the upper ground, and the ground temperature at this time is still relatively low, and the root system is not fully active, and the water required for the growth of the aboveground cannot be improved, resulting in physiological water loss, drainage, and longitudinal cracking.

Why greenhouse grapes are easy to drain.

First, unearthed too early for the young trees buried in the soil to prevent the cold, if unearthed too early, it is easy to freeze when encountering the cold of spring, resulting in the drying and death of the main celery brigade. Some grapes are not buried in the soil to protect from the cold, and some are buried in the soil, but because the upper soil layer is too thin, they are also prone to death when they encounter severe frost damage. Poor management due to poor management in the process of fertilization and growth in the previous year, especially in autumn management, too much nitrogen fertilizer, less phosphorus and potassium, more irrigation during the growth period, slightly less control of topping, poor maturity of the main vine, weak drought resistance and cold resistance, and the phenomenon of dry and dead trees is easy to occur in the cold winter.

3. Climatic factors: On the one hand, the climate is severely arid. Since last winter, there has been very little effective precipitation and dry weather, which is extremely unfavorable for the growth of fruit trees. In addition, due to the windy early spring, the temperature is unstable, and the temperature difference is large, resulting in the early activity of the grapes in the upper ground, and the ground temperature at this time is still relatively low, and the root system is not fully active, and the water required for the growth of the aboveground cannot be improved, resulting in physiological water loss, and the phenomenon of dryness and longitudinal cracking occurs.

My question is about greenhouse grapes.

Yes. Do greenhouse grapes need to be buried?

These are the general factors that rational management can reverse.

My question.

The so-called greenhouse grapes are a greenhouse environment.

Condition, shouldn't grapes be planted in the soil?

The first situation is that the temperature in the greenhouse is very fast in spring, and the temperature inside the greenhouse is easy to reach more than 30 degrees.

This condition in particular makes the shoots susceptible to water loss. At this point, the shoots should be adequately hydrated.

Do greenhouse grapes need to be buried?

What do you think of the greenhouse grapes? Ordinary grapes need to be planted in the soil.

Greenhouse grapes should be buried in the soil or on shelves.

Oh in the dirt. Grapes are usually grown in the soil, but there may also be grapes that grow on shelves.

When the grapes become dirty when they are ripe, it is necessary to pay attention to the proper management methods

1. Soil management.

Shallow tillage weeding, keep the soil loose to increase soil permeability, promote fruit coloring, inhibit the occurrence of diseases and insects, shallow tillage once after each rainfall and watering, the depth is about 10 cm.

2. Ground mulching and grass.

In plots with high temperature and low groundwater level, long-term grass mulching and grass growth can reduce ground temperature, prevent soil nutrient loss, reduce soil moisture and nutrient evaporation, and increase soil air permeability, which is conducive to the growth of root system.

3. Fertilization. The top dressing is mainly based on biological bacteria liquid with low nitrogen, phosphorus and high potassium. In order to increase the volume and weight of berries, improve the sugar content, enhance the coloration, and promote the neatness and consistency of fruit ripening, combined with spraying of disease and insect control, potassium monophosphate monophosphate can be sprayed, or 1-2% plant ash leach, sprayed 2-3 times. When spraying, rainy days and windy days can not be sprayed, dew can not be sprayed in the morning, sprayed after 5 pm when high temperature, to avoid pesticide damage when there is high temperature and dew.

The spraying is mainly on the back of the leaf and the surface of the leaf. Foliar fertilizer spray cannot replace all root fertilization, and must ensure that the soil is fertilized in order to play the role of foliar fertilizer.

4. Moisture management.

Excessive water in the berry coloring period will affect the accumulation of sugar, slow coloring, reduce quality and flavor, and are prone to white rot, downy mildew, acid rot and other diseases and insects.

Drainage, although the grapes are more tolerant, must be well drained in low-lying vineyards with stagnant water and even cloudy water. Because the grape root system can only grow vigorously when the soil oxygen content is more than 15%, produce more new roots, when the oxygen content is less than 5%, the root growth is all inhibited, the capillary roots begin to die, when the content is less than 3%, the root system will die with the kiln. When watering is too much in the later stage, it promotes the growth of greedy green and delays the ripening of berries.

When the grapes are ripe, there will be gray-white gray stains on the surface, and the ash is actually a yeast colony, which is harmless to the human body.

Nothing to do with the wind and sun?

Working in a greenhouse where grapes are grown is not harmful.

With the production of polymer polyvinyl chloride and polyethylene, plastic films are widely used in agriculture. In Japan, Europe and the United States, in the early 50s, greenhouse film was used to cover the greenbed successfully, and then the greenhouse and greenhouse were also covered with good results. In the autumn of 1955, China introduced polyvinyl chloride agricultural film, which was first used in Beijing to cover vegetables in small sheds, and obtained the effect of early maturity and increased yield.

Greenhouse was originally a special equipment for vegetable production, and with the development of production, the application of greenhouses is becoming more and more extensive.

At present, the greenhouse has been used for potted flowers and cut flower cultivation; Fruit tree production is used to cultivate grapes, strawberries, watermelons, melons, peaches and citrus; Forestry production is used for the cultivation of forest seedlings and ornamental trees; Aquaculture is used for silkworm raising, chicken raising, cattle raising, pig raising, fish and fish fry, etc.

Grape black pox disease is also known as atrophy disease, commonly known as "bird's eye spot"."Dark spots", which is an important disease of grapes.

Symptoms After leaf damage, large brown spots appear in the early stage, then develop into yellow-brown round lesions with a diameter of 1-4 mm, turn gray in the middle, and finally the diseased tissues dry up and harden, and fall off into perforations. After the young leaves are damaged, they are often distorted, shrunken and deformed.

The fruit is less susceptible to the disease after coloring. In the early stage of susceptibility, the green fruit produces brown round spots, the middle of the round spots are grayish-white, slightly concave, and the edges are reddish-brown or purple"Bird's eye"form, a plurality of small lesions unite into large spots; Later stage of the lesion hardening or cracking. The diseased fruit is sour and has no edible value.

New shoots, petioles, fruit stalks, tendrils. After susceptibility, small round brown dots are initially produced, and later turn gray-black, and the middle is depressed into a dry and cracked ulcer spot, and finally withers or dies in severe disease.

Causes] Pathogenesis The pathogen overwinters in the diseased tissues remaining in the orchard with mycelial base macrobodies, and the lesions on the fruiting mother branches and tendrils are the main ones. The following year, when environmental conditions are suitable, conidia are produced. Conidia are spread by wind and rain, and the first damage is to the new shoots and young leaves, and later to infect the fruits, tendrils, etc.

The incubation period is 6-12 days after the spores invade the beat. The disease generally begins to develop in late May to early June after the temperature rises, and the peak period of the disease is from mid-June to early July, and the disease stops developing after October. From the perspective of grape growth period, the disease occurs at the bud flowering stage.

Grape disease resistance increases with tissue maturity. For example, young leaves, young fruits, young shoots and other most susceptible leaves and coloring fruits have enhanced disease resistance, partial application of nitrogen fertilizer, new shoot growth is not full, autumn buds are vigorous development of plants and orchards with heavy soil clay, high groundwater level, high humidity, poor ventilation and light transmission.

Prevention and control methods] 1Seedling disinfection. The long-distance transmission of grape melanosis is mainly through seedlings. Therefore, the seedlings and cuttings should be strictly inspected, and the seedling cuttings suspected of carrying bacteria must be disinfected.

2.Do a good job in orchard hygiene, prune and remove diseased leaves, diseased fruits and vines.

3.Spray protection. The prevention and control of grape black pox should be sprayed once every 10 15 days after the grape leaves are developed and before the fruit is colored.

Among them, spraying before flowering and when the flowers fall 70% to 80% is the most important. The incidence is highest because the fruit is susceptible to disease during this time. It can be used with 1 Bordeaux liquid, or 65% zeb wettable powder 500 600 times liquid, or 50% carbendazim wettable powder 1000 times liquid, or 75% chlorothalonil wettable powder 600 times liquid, or polyantimycin 800 times liquid to prevent and control black pox, the effect is very good.

At the same time, it is necessary to strengthen management, top dressing should use fertilizers containing nitrogen, phosphorus, potassium and trace elements, avoid separate and excessive application of nitrogen fertilizer, and do a good job of drainage after rain to prevent water accumulation in orchards. Weeding, plucking, and vine tying between rows should be timely.