What are the symptoms of chayote leaf burn? How can it be prevented?

The disease is a physiological disease caused by high temperatures. The high temperature in the shed, at noon under the strong light, the wind is not timely and easy to cause leaf burn. In addition, the pruning near the ground of the shed should be as short as possible, so that the melon leaves are not close to the shed film.

At the beginning of the disease, the chlorophyll of the diseased part is significantly reduced, and small white patches appear on the leaf surface, which are polygonal or irregularly shaped, and appear white to yellow-white patches after enlargement.

<> melons are harvested and do not stop physiological activities, you can use a basket or cardboard box containing bananas, oranges, apples, and put newspaper around it, gently put the melons, and then put them indoors at a natural temperature to let them ripen later. Do not cover the basket with objectsChayote is a vegetable that uses whole melons as sowing material, and it is a vegetable that truly "grows melons and gets melons". Generally, the live broadcast method is adopted.

In colder areas, spring sowing can be done in a simple protected area, i.e. early seedling cultivation in a hotbed or greenhouse, where the cut fruit is peeled in the seedbed, covered with soil, and germinated in a sunny place. Seedlings are usually sown in mid to late April, and transplanted seedlings can be sown in the conservation facility about a month in advance.

In the south, sowing is generally done in February-April; In the Yangtze River basin, sowing is from early March to late April; In the northern region, seedlings are transplanted directly from early to mid-April to early to mid-May, and seedlings are raised in greenhouses beforehand. In the cultivation of chayote, it is also necessary to pay attention to top dressing, nitrogen fertilizer during the growth period, foliar fertilizer should be added during flowering, and of course, boron fertilizer should be used when the fruit grows, so that it can grow better.

Chayote is both barren and fertilizer-tolerant, and the female flower differentiation is dominated by side vines, with a wide range of branches, and if you want to have a high yield, you must supply rich nutrients for a long time. About a month before sowing, the sowing place should be selected, dig a deep melon pit, the pit is 50 cm deep chayote pests are very few, generally do not need to spray, chayote flowering and fruiting are more concentrated, and have a greater impact on the growth of stems and vines. To pick in time, it is conducive to the growth and development of the stubble melon, chayote is generally ripe in about 25 days after flowering.

Small white patches appear on the leaf surface, polygonal or irregularly shaped, enlarged to white to yellowish-white patches, and chlorophyll is significantly reduced. Pay attention to timely ventilation and cooling, and strictly control the temperature and time of the stuffy shed to prevent leaf burning.

When chayote gets leaf burn, the leaves will be yellow, curly, and appear with dense brown spots. It can be dissolved with white vinegar and salt every three days, dissolved in a ratio of 1 to 1, and sprinkled on the leaves to prevent it.

Why does the planted chayote have leaf spot? How do I deal with it?

Bergamot grandmelon (leaf spotted mold) leaf spot disease is a common fungal disease in the period of chayote mold chain planting. The harmful fungus is Punctum round-leaved, which belongs to the type of fungus of the subphylum Semi-Knowitives. It is mainly manifested by the appearance of round spots on the surface of the leaves, which eventually lead to the shedding of the leaves.

This disease can be prevented and controlled by applying pesticides, etc.

If there is no worm, the upper part of the disease, affecting the growth of the detoxification leaf exhibition or green exhibition two or three times, there is a special formula is faster.

Chayote hail mold.

To burn your hands, you need to rinse your hands with clean water.

Chayote's mucus mainly exists in its simple skin, which contains a resin component, if it comes into contact with the mucus, it will absorb the water in it, giving people a feeling of burning hands. Therefore, it is necessary to wear disposable gloves before handling chayote to prevent mucus contact**.

If the mucus of chayote comes into contact with **, you need to rinse your hands with water and wash the mucus with dry pants. If it cannot be cleaned, it can be coated with alcohol or vinegar and then washed repeatedly. After washing, you can apply a moisturizing hand cream and your hands are ready to recover.

Proper shade and regular fertilization.

The yellowing of the leaves of bergamot can be caused by four conditions. One is that if you water too much, the water is too large and it is easy to dip the roots, and the leaves will turn yellow. It is necessary to stop the water first, and loosen the soil frequently to allow the water to evaporate quickly.

The second is that the light is too strong and not sun-resistant, and the strong light in summer must be blocked. The third is the lack of nutrients, the growing season needs to be fertilized regularly, once the lack of nutrients will be yellowed. Fourth, the temperature is too low, low temperature will frostbite the plant, and it must be moved to a warm place indoors as soon as possible after the winter cooling.

Chayote yellowing causes and prevention measures.

1. Watering too much.

Although bergamot prefers a relatively humid environment, it is not tolerant of waterlogging. If it is watered frequently during the management period, the soil is moist or even waterlogged, it is easy to root and the leaves will turn yellow. It should be treated with drainage, multi-ventilation, and pine the surface of the soil to evaporate the water.

Pay attention to the appropriate amount of watering in the later stage and control the amount of water.

Second, the light is too strong.

Bergamot is a plant that loves light, but it is not tolerant to sunlight. If you bask in the strong sun for a period of time, you will get sunburned, and the leaves will become soft, yellow, and even dry up. The yellow leaves should be cleaned up as soon as possible, and they should be moved to a cool place, and the leaves should be sprinkled with water frequently to cool down, so that they will slowly recover.

3. Lack of nutrients.

Bergamot consumes more nutrients during the growing season, so fertilizer should be applied regularly. If you do not give fertilizer for a long time during the management period and let it grow, it is easy to have yellow leaves due to lack of nutrients. It is necessary to supplement the water-soluble fertilizer of Ribery Yanwo as soon as possible, which is absorbed quickly and the plant recovers quickly.

Fourth, the temperature is too low.

The cold tolerance of bergamot itself is very poor, if it is in a low temperature environment for a long time, it is easy to be frostbitten, the leaves are easy to yellow, and even dry up and fall. Note that after the winter cooling, you must move indoors as soon as possible, and the minimum temperature must be above 10 degrees.

There have been quite a few cases in Guangdong this year, and the yellowing leaf curl virus has returned to normal after three doses. Is the incidence high now? Chayote common mosaic disease, yellowing, curling leaves and other viral diseases, rapid treatment methods

In the early stage of the disease and after rain, 500 times of 50% pumpkin copper fertilizer wet powder, 300 times of 14% bile ammonia cave self-preparation, 600 1000 times of 50% chlorobromoisocyanuric acid humidifier, 20% Kuijundong 1000 1500 times of self-preparation and other agents can be used for prevention. Seeing this, the question arises, how to identify and prevent diseases with bergamot? In the following article, I will share with you the identification and preventive measures of bergamot disease based on my years of cultivation experience.

Powdery mildew is one of the main diseases that affect the healthy growth of Bergamoeae, powdery mildew mainly affects the leaves of Bergamotaceae, from seedlings to plant maturity, and it is possible to get sick during this cycle. In the middle and late stages of the growth of Buddha watermelon, the probability of getting disease is relatively high.

The identification of white powder is relatively simple. Because its main site of onset is on the leaves. Diseased leaves are also easy to spot.

Therefore, the identification process is not difficult. Let us analyze what are the characteristics of the early, middle and late stages of infectious diseases. Friends who grow bergamot can judge whether their bergamot is infected with downy mildew according to the characteristics of early, middle, late and stage 3 of downy mildew.

If there is a similar situation, it should be strengthened** so as not to affect production and economic benefits.

There are two main ways to deal with downy mildew, the first is to strengthen prevention. This method is mainly for bergamot that is not infected with downy mildew. The second is the use of drugs**, which mainly targets plants infected with downy mildew.

Downy mildew prevention measures should mainly strengthen field management. Downy mildew is caused by a fungal infection, so it is transmissible to a certain extent, and it must be blocked during the planting process in order for bergamot to grow healthily.

Chayote can reach 60 70 m2 per plant, so the main meal should be large, the diameter of the pot is suitable for 40 60 cm, 6 parts of potting soil, 2 parts of non-staple food hot compost, 2 parts of sand, supporting production. It is strictly forbidden to give 1 2 kg of rice cake fertilizer or 3 5 kg of rotten chicken manure per pot, kg of bone meal, to fertilizer that is not fully fermented. Because bergamot and seedlings are very sensitive to ammonia and are prone to burns, there are 1 1 trees per pot.

The main meal time is preferable before and after Qingming. It can be placed on the balcony in advance, and after planting, the seedlings can be covered with plastic film, and a small hole can be opened in the gap for ventilation. The soil for planting should be watered in advance, and a small amount of water should be sprinkled after planting, and it is absolutely not possible to water more.

It is necessary to prevent root rot from occurring at high humidity and low temperature.

Because of the high planting density, poor ventilation and light transmission, poor drainage, soil acidity, etc., it is necessary to remove the residual plants and leaves in time, watering reasonably, and spraying in a timely manner.

Leaf spot is a common fungal disease during chayote cultivation. The harmful fungus Umbela xanthera is a fungus of the subphylum Hemiptera. It is mainly manifested by the appearance of round spots on the surface of the leaves, which eventually lead to the shedding of the leaves.

The application of fully decomposed organic fertilizer, the use of formula fertilization technology, the application of 400 ml of Manfeng multi-compound liquid fertilizer per 667 square meters, dilution of 500 times water, foliar spray can enhance disease resistance.

Leaf spot disease is a condition in which the leaves are infected with the disease at first, forming small water-stained spots on the leaf surface, and then expanding into nearly round to irregularly shaped lesions. Increase the application of fully decomposed organic fertilizer, adopt formula fertilization technology, use Huimanfeng multi-element compound liquid fertilizer, dilute and spray the foliar surface with water, which can enhance disease resistance. Irrigation is controlled in a timely and appropriate amount of watering, drainage is timely after rain, and the lower leaves are removed if necessary to increase permeability.

Chayote leaf spot disease is a common fungal disease during the cultivation of chayote. The harmful fungus is Pontidophyllum orthodophylla, which belongs to the type of fungus of the subphylum Semi-Knowitives. It is mainly manifested by the appearance of round spots on the surface of the leaves, which eventually lead to the shedding of the leaves.

1) Implement crop rotation for more than 2 years, and mulching can reduce the initial infection.

2) Increase the application of fully decomposed organic fertilizer, adopt formula fertilization technology, apply 400 ml of Manfeng multi-element compound liquid fertilizer per 667 square meters, and spray the foliar surface with 500 times dilution of water, which can enhance disease resistance.

In summer, the high temperature chayote rhizome rot is leaf blight. Bordeaux liquid can be sprayed.

Bordeaux liquor is an inorganic copper bactericide. It is a sky blue gelatinous suspension formulated from about 500 grams of copper sulfate, 500 grams of hydrated lime and 50 kilograms of water. The ingredient ratio can be appropriately increased or decreased as needed.

It is generally alkaline and has good adhesion properties, but it is suitable to be used for a long time or made of dehydrated Bordeaux powder, and then mixed with water when used.

The solution is a protective bactericide, which inhibits the spore germination or hyphal growth of pathogenic bacteria by releasing soluble copper ions. Under acidic conditions, when a large amount of copper ions are released, it can also coagulate the cell protoplasm of pathogenic bacteria and play a sterilizing role. In the case of high relative humidity and dew or water film on the leaf surface, the efficacy is better, but it is easy to cause pesticide damage to plants with poor copper tolerance.

It has a long effective period, and is widely used to prevent and control a variety of diseases such as vegetables, fruit trees, cotton, hemp, etc., and has a particularly good effect on downy mildew, charcoal disease, potato late blight and other leaf diseases.

Bordeaux liquor is a protective biocide. The active ingredient is basic copper sulfate, which can effectively prevent the germination of spores, prevent the infection of pathogens, and can promote the leaf color to be dark green, grow robustly, and improve the disease resistance of the tree. The preparation has the characteristics of wide bacteriological spectrum, long duration of effect, no resistance to pathogens, low toxicity to humans and animals, etc., and is a fungicide with the longest application history.

Bordeaux liquid itself does not have a bactericidal effect, and when it is sprayed on the surface of the plant, it is adsorbed on the surface of the crop due to its adhesive properties. In the process of metabolism, plants will secrete acidic liquid, coupled with the acidic substances secreted by bacteria when invading plant cells, so that a small amount of basic copper sulfate in Bordeaux solution is converted into soluble copper sulfate, thereby producing a small amount of copper ions (Cu2+), Cu2+ enters the bacterial cells, so that the proteins in the cells coagulate. At the same time, Cu2+ can also destroy a certain enzyme in its cells, so that the metabolism in the bacterial body cannot be carried out normally.

Under the influence of these two effects, the bacteria can die.

Prevention and control objects. To prevent and control early apple defoliation, charcoal disease, and ring pattern disease, you can start spraying lime multiplier Bordeaux solution 200 to 240 times after apple flowering, spray once every half month, and alternately use it with other fungicides, a total of 3 to 4 times. To prevent and control apple rot disease (ring pattern disease, charcoal and disease), you can spray lime double or multi-amount Bordeaux liquid 200 times 10 to 15 days before the appearance of diseased fruit in previous years, spray 1 time every 15 to 20 days, spray 3 to 4 times, and stop using 25 days before fruit picking.

To prevent and control apple mildew heart disease, 200 times of lime multiple-type Bordeaux solution should be sprayed at the beginning of the apple budding period. To prevent and control apple and pear rust, you can spray 160 times of lime equivalent Bordeaux liquid on the juniper cypress around the apple orchard. To prevent and control grape black and disease, charcoal and disease, downy mildew, you can spray a small amount of lime Bordeaux liquid 160 times, spray once every 12 to 15 days, a total of 2 to 4 times.

After the rainy season, Bordeaux juice is used to control grape diseases.

I can't see, I can't hear, all the time has passed, there are a few cities between you and me, in fact, to put it bluntly, in a blink of an eye, if you are really willing, you will use time to fill the vacancy that you are unwilling to do, and then you will spend another day in the garden and dig for research.

You can spray some pesticides to prevent leaf class disease at ordinary times, so that you can prevent the appearance of leaf class disease very well.

In the event of such a plant disease, you can only choose to spray some chemical pesticides to prevent it, which is indeed a very effective fruit.