What s the matter with a lot of black spots on the surface of pears?

Pear black spot disease mainly occurs in the calyx depressions, stem depressions and carcasses of pear fruits. At the beginning of the disease, small black dots the size of pinpoints appeared around the calyx, and as the disease progressed, the black dots gradually expanded, and by mid to late July, they developed into nearly circular black spots with a diameter of 1 2 mm. The number of black dots varies, and there is a white gelatinous substance on the black dots.

The lesions are brown in the middle, corked, and cracked to varying degrees. The outer edge of the lesion is black with a green halo around it. With the severity of the disease, sometimes several lesions are connected into patches, and the dark spots on the fruit surface are slightly concave.

Disease spots only occur on the skin of the fruit, do not penetrate deep into the pulp, taste the flesh without bitterness, and will not cause fruit rot. In the late growth stage and fruit storage period of pear fruit, the lesions will not continue to spread and expand.

What's going on with the blackening of the surface of the pear1If the skin of the pear has black spots, and the black spots have been dented after pressing, it means that the pears have begun to mildew, producing a large number of microorganisms, even if the black spots are dug out, other flesh parts may be infected, so this kind of pear should not continue to eat. 2.

In addition, pears will also undergo oxidation reaction after being bumped or scratched and turn black, if only the skin is blackened, the flesh inside has not rotted and can continue to be eaten.

There are many black spots on the surface of the pear, and the black spot press has been dented to indicate that the pear has not changed, producing a large number of microorganisms, dig out the black spot part in time, and other flesh parts may also be infected, this ion should not continue to eat, the pear will also oxidize and blacken after being bumped or scratched, if only the epidermis turns black, the flesh inside has not rotted, you can continue to eat.

In fact, there is a kind of insect that crawls on the surface of the pear when the pear is about to ripen, and the pear has this kind of black spot, in fact, this kind of pear crawled by the insect is sweeter than others!

There are many black spots on the surface of the pear to prove that they are ripe, and the black spots are a sign of overripeness.

I guess it's been too long, right?

Can you still eat these small black spots on the surface of pears? You'll understand after reading it.

It is a natural phenomenon that there are spots on the epidermis of pears! If it is not caused by diseases and pesticides, it is caused by pigmentation in the respiratory pores of the pear epidermis, which can also prevent the evaporation and loss of water.

1. Symptoms.

This black spot disease is generally referred to as black spot disease, which generally occurs on bagged pears. In the early stage of the disease, there will be various black spots of different sizes on the surface of the pear, and these black spots will gradually spread, and finally many spots will spread together to form plaques. However, this black spot is harming the peel and has no effect on the pulp and leaves, nor does it affect the taste, so it will not cause problems with dog meat.

Although none of this has any effect, it destroys the appearance, affects the aesthetics, and makes it impossible to sell.

2. Pathogenesis.

If the young fruit is infected before bagging, it will not become ill. It generally starts around the beginning of summer, and the pear fruit swelling period begins in July, when the pear fruit needs a lot of breathing. The temperature and humidity inside the bag will increase, which is more conducive to the growth of black spot germs.

If there is continuous rainy weather, the permeability in the bag is seriously reduced, resulting in an increase and more serious incidence of black spot disease, and the high temperature and humidity of the paper bag will lead to an increase in the incidence of black spot disease.

3. Causes of the disease.

There are many causes of the disease, such as mealworms and other insect pests invading the peel of the pear fruit in the paper bag and eating the peel, causing the immune system of the peel to fail, unable to absorb nutrients, and the peel turns black. In addition, germological diseases such as Alternaria can parasitize the soil and disease residues, and are transmitted through rain and wind, affecting the development of the peel. The last reason is the bagging reason, which may be due to the poor quality of the bagging, poor permeability, and high temperature, which leads to the necrosis of some cells in the peel.

4. Prevention and control measures.

When the pear tree grows too tall or too large, it is necessary to prune the tall branches reasonably and appropriately, strengthen the ventilation and light transmission of the orchard, disinfect the soil, and concentrate on cleaning up the diseased and diseased bodies. Appropriately reduce the temperature in the garden and choose high-quality fruit bags. According to professional data, the highest incidence rate of plastic film is as high as the incidence rate, and the lowest is the double-layer non-waxed newspaper, with an incidence rate of only 7%.

After bagging, set up several more vents in the fruit bag to ensure the temperature and humidity in the bag. Pest control is carried out by spraying pesticides before each stage of the pear tree.

If it is a raw pear, remove the black spots from the inside, and the flesh part can be eaten.

There are black spots inside the pear generally because:

1. There are black spots in the inside of ripe pears, first see if they are the seeds of the fruit, if the black spots are the seeds of pears, pick out the seeds, and the others can still be eaten.

2. If the inspection is not the fruit seed, it is that the production process carries other foreign substances or insect pests of the fruit itself, if it is other foreign substances and pests, then it cannot be eaten, and the ripe pears are directly discarded.

If you have a lot of black spots, don't eat it. Generally, don't eat a part of the fruit that is rotten or diseased, and some people will think that as long as the diseased part is cut off, it will not affect the disease, which is wrong.

Generally, if a part is diseased, the whole fruit has been affected, but it is not visible to the human eye

Don't eat it, generally don't eat a part of the fruit that is rotten or diseased, some people will think that as long as the diseased part is cut off, it will not affect the disease, which is wrong.

Generally, if a part is diseased, the whole fruit has been affected, but it is not visible to the human eye

Those black spots are rotten parts, chemically speaking, oxidized, you should have bought them that are not fresh, or you have been buying them for a long time.

The skin of the pear or the heart is black and not suitable for consumption, the blackening indicates that it has mildew, which produces a large number of microorganisms, which will cause gastrointestinal discomfort after use, resulting in diarrhea and other symptoms.

After living for more than 30 years, I realized that the black spots on the pears were still edible, so I reminded my family quickly.

Can you still eat these small black spots on the surface of pears? You'll understand after reading it.

It is recommended not to eat it, probably spoiled or something.

Yes, just remove the spoiled parts.

Yes, but it's best to be careful.

If you have black spots, you can't eat them.

It's better not to eat, not knowing what it is.

Are there many black spots? If you have too much, don't eat it.

Thank you for your patience, the following is the information compiled for your reference, please consider it according to the actual specific situation, so as not to affect you There may be the following reasons for the appearance of black spots on the surface of pears:1Gray macro mildew:

Botrytis is one of the most common pear tree diseases and causes black or grey spots on the surface of the pear. Pathogenic bacteria mostly grow in humid environments, and it is recommended to strengthen ventilation and light during the growth period of pear trees to reduce the occurrence of humid environments. 2.

Soot pollution: If a pear tree grows in an area with high levels of air pollution, it is prone to black spots on the surface of the pear. 3.

Mechanical damage: During picking, transportation, and storage, the surface of the pear fruit may be subjected to mechanical damage, resulting in black spots on the surface. 4.

Acids or other chemicals: Exposure to acids or other chemicals during pear tree growth can also cause black spots to appear on the surface of the pear. It is recommended to pay attention to the protection and management of pear trees in the process of planting which row to cultivate, so as to avoid the occurrence of the above reasons and ensure the quality of the surface of pear fruits.

Thank you very much for your question, I can give you some advice about the appearance of big black spots on the pear tree. Please note that the following recommendations are for reference only and actual processing methods may vary depending on the environment and specific circumstances.

1.Understand**: First, we need to determine if these large black spots are caused by a fungal infection. Common fungal diseases on pear trees include pear black spot and black spot disease. By observing the symptoms of diseased leaves and fruits, it is possible to better judge**.

2.Cut off the infected part: When an infected leaf or fruit is found, Lao Rang will cut it in time and clean it thoroughly to reduce the spread of pathogens. Be sure to burn or dispose of the severed parts thoroughly to avoid further transmission of pathogens.

3.Strengthen the plant's resistance: It is very important to keep the pear tree in a healthy state. Give the pear tree plenty of sunlight, proper irrigation and proper fertilization, and ensure good ventilation. This will help to improve the resistance of the pear tree and reduce the occurrence of potential diseases.

4.Use of chemical control agents: If the condition is severe and other methods are ineffective, consider using appropriate chemical control agents. Please ensure that you follow the recommendations on the product leaflet and follow the safety operating procedures.

5.Close monitoring and prevention: Regularly inspect the pear trees and keep an eye out for any disease symptoms. Prompt action can prevent further deterioration of the condition.

Finally, I recommend getting in touch with a local horticultural expert or agricultural agency for more accurate and personalized advice when dealing with plant diseases. Hope you find this information helpful!

Pear scab is the main disease of pear trees, the disease is mainly harmful to the young tissues of pear trees (young leaves, young fruits, tender slightly, etc.), the disease part produces black mold, the leaves are damaged, the lesions mostly occur on the back of the leaves, it is a faded green irregular shape, the leaf veins and petioles are elongated and oval, the black mold layer appears soon on the lesions, the leaves turn yellow and red, and it is easy to fall off early. The lesions of young fruits begin to be pale yellow dots, and then expand into round, and the black mold layer is gradually concave, hardened or cracked, and is easy to fall off early. The lesions on the young shoots are oval or nearly round, with black mold, depressions, cracks, and scabs.

The young shoots extracted from the diseased shoots have lesions mostly at the base of the shoots, and the bud scales are loose and do not fall. Growing branches and autumn shoots are susceptible to disease, and in severe cases, they die. The lesions of the inflorescence are mostly at the base of the peduncle, which gradually withers and wilts.

Pear scab disease can occur from the flowering stage to the fruit ripening stage, mainly harming all green and tender tissues in the upper part of the pear tree such as scales, leaves, petioles, leaf marks, new shoots, flowers, fruits, etc., and invade from the flowering stage, resulting in flower and fruit dropping, and the fruit heart becomes black during the fruit harvest and storage period in August after the invasion of the pathogen in March.

Prevention and control methods: lAfter the pear falls flowering, combined with thinning flowers and fruits, pruning the diseased shoots has a great effect on controlling the onset of the disease throughout the year.

2.7-10 days after flowering, 1000 times of 20 dysenammonium, 8000-10000 times of 40 Fuxing, and 167 grams of Xiansheng were used for control. 3.

At the peak of the disease, in mid to late June, 40 Fuxing 8000-10000 times, Xiansheng 167 grams, and 80 Dysen zinc 800 times were used for prevention and treatment.

How to put an end to pear black spot disease.

The main problem of bagging pear is the problem of black spot disease, at the beginning of the disease, small black spots with large needle tips appear around the calyx of the fruit and gradually expand, and grow into a nearly round black spot with a diameter of 1 3 mm in July and August, less than 1 2 and more than 3 5, the black spots are often attached to white gum but only occur on the surface of the peel and do not penetrate deep into the pulp. In the late growth and storage period, it does not expand and spread, and has no effect on the internal quality, but has a great impact on the appearance quality and selling price.

Spraying the film-free bag before the pear tree paper bag does not affect the light and coloring, and can prevent the occurrence of black spot disease after use, so that the surface of the fruit is smooth, the color is bright, the taste is pure, the shelf life is long, and the invasion of germs is effectively prevented, the external air is isolated from the invasion of the fruit, and the quality of the fruit is improved.

1. The pulp cells are destroyed, and the air oxidizes the enzymes in the cells. The chemical reaction that occurs when the flesh turns dark brown helps the cells heal. Therefore, this will cause the flesh to look black, and the fruit itself is not a problem and will not cause harm to the body.

2. Pear, usually a deciduous tree or shrub, a very small number of varieties are evergreen, belonging to the angiosperm phylum Dicotyledonous class Rosaceae apple subfamily. The leaves are mostly ovate and vary in size depending on the species. The flowers are white, or slightly yellowish or pink, with five petals.

The shape of the fruit is round, and there are also those with a thinner base and a thicker tail, which is commonly known as "pear-shaped"; The peel color of different varieties is very different, including yellow, green, yellow with green, green with yellow, yellowish brown, greenish brown, reddish-brown, brown, and some varieties also have purple-red; Wild pears have smaller fruit diameters of between 1 and 4 cm, while cultivated varieties can reach 8 cm in diameter and 18 cm in length.