Persimmon anthracnose is more serious, what are the symptoms of persimmon anthracnose?

The optimal temperature for the development of the bacterium is about 25, lower than 9 or higher than 35, which is not conducive to the spread of the disease. The pathogen mainly overwinters in the branches and lesions in mycelium, and can also overwinter in diseased fruits, leaf scars and winter buds, and can produce conidia for initial infection in the early spring of the following year. Conidia are mainly spread by wind and rain and insects, and attack new shoots and young fruits.

Germs invade through wounds, stomata, etc. Anthrax generally begins to develop its onset after budding and leaf-spreading, and the diseased fruits begin to fall off in June, and anthrax appears at its peak in the rainy season.

Therefore, the temperature is already high, there is a lot of rain, the air humidity is high, and the light is insufficient, which is conducive to the development of germs. Every time 1 rain will produce 1 conidia, infected 1 time, become an outbreak disease, anthrax bacteria like high temperature and high humidity environment, the temperature rises after rain, easy to appear the peak of disease, heavy disease in rainy years in summer, light disease in dry years, heavy soil clay, poor drainage, partial application of nitrogen fertilizer, poor growth of tree potential, serious disease and insect damage persimmon orchard disease is also serious, canopy canopy, no ventilation and light transmission, extensive management, weak tree is prone to disease.

There will be yellowing of the leaves, black spots on the surface of the peel, lots of small black spots on the leaves, root rot, or irregular leaves.

The leaves will turn yellow, have black spots, or dark brown spots, and cause root rot or leaf wilting.

There will be a lot of round spots on the branches, which will gradually expand and cause the branches to die. There will also be some spots on the persimmons, and there will also be some stickiness.

There are black spots on the surface of the leaf hair, and there are many small black spots on the leaves, rotten roots or leaf unequal phenomena.

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Persimmon in the growth, there will be the occurrence of pests and diseases, especially anthracnose, because of improper maintenance and management, or the growth environment is too stuffy, the bacteria will generally invade through the wound, and then harm the fruit, anthrax prefers a high temperature environment, the greatest harm when the temperature rises after the rain, and it needs to be used in a timely manner.

Causes of persimmon anthracnose.

Persimmon in the preparation of scattered growth, there will be the occurrence of pests and diseases, especially anthracnose, because of improper maintenance and management, or the growth environment is too stuffy, the bacteria will generally invade through the wound, and then harm the fruit, anthrax prefers a high temperature environment, and the temperature rises after the rain is the most harmful.

Persimmon anthrax symptoms.

Persimmon in the occurrence of anthrax, the most harmful is the fruit and new shoots, the leaves are generally rarely diseased, in the early stage of the disease, the fruit will appear brown spots, in the later stage will gradually expand, showing a round, and the petiole will also turn yellow, even black.

Persimmon anthracnose**.

Persimmon in the occurrence of anthrax, need to use the agent in a timely manner, a front will be sprayed with Baumé stone sulfur mixture or Bordeaux liquid, the effect is relatively good, need to be sprayed in the early stage of the disease, if it is in the later stage, the effect will not be very good.

After the occurrence of anthracnose, persimmons can gradually recover if they use drugs in a timely manner, but in the later stage, it is more difficult to recover.

Persimmon anthracnose prevention and control methods.

Persimmon in the usual maintenance, it is necessary to strengthen the management of the park, and to reasonable fertilization, enhance the tree potential, improve the tree disease resistance.

In normal times, it is necessary to prune properly, some diseased branches, diseased fruits and diseased leaves need to be pruned, and in the event of anthrax, it is necessary to imitate the timely use of pesticides**.

Persimmon trees in the growth, there will be the occurrence of pests and diseases, especially anthracnose, the harm is relatively large, because of improper management of fertilizer and water, or the environment is too stuffy, generally in June, in the rainy season belongs to the peak of the disease, after the discovery of the need for timely **, you can use antibacterial special 1000 times the solution **.

Causes of anthracnose in persimmon trees.

Persimmon trees in the growth, there will be the occurrence of pests and diseases, especially anthracnose, the harm is relatively large, because of the improper management of the vertical fertilizer water, or the environment is too stuffy, generally in June, the disease is in June, in the rainy season belongs to the peak period of the disease, after the discovery of the need for timely **.

Persimmon dust filial piety anthracnose symptoms.

Persimmon tree in the occurrence of anthracnose, the most harmful is the fruit and new shoots, the leaves are generally rarely diseased, in the early stage of the disease, the fruit will appear brown spots, in the later stage will gradually expand, showing a round, and the petiole will also turn yellow, even black.

Persimmon tree anthracnose**.

Persimmon tree in the occurrence of anthracnose, need to use the agent in a timely manner, generally spray Baumé stone sulfur mixture or Bordeaux liquid, the effect is relatively good, need to be sprayed in the early stage of the disease, if it is in the later stage, the effect will not be very good.

Persimmon trees can also use some special drugs with good effects, such as antibacterial special 1000 times liquid, the effect is very obvious.

Methods for the prevention and control of anthracnose in persimmon trees.

Persimmon trees in the usual maintenance, need to strengthen the management of the park, and to reasonable fertilization, enhance tree potential, improve the ability of the tree to resist disease, in ordinary times to properly prune, need to prune some diseased branches, diseased fruits and diseased leaves, and in the event of anthracnose to use the agent in a timely manner**.

Summary. Prevention and control measures of persimmon tree anthracnose: Preventing the spread of the disease is a prerequisite for the prevention and control of anthracnose, and timely and appropriate drug prevention and control is the key to the prevention and control of the disease.

In this regard, we must do the following work: 1. Scrape off the necrotic tissue on the persimmon tree scar in time and bury the necrotic tissue in a concentrated and deep manner, and apply the "tree protection general" for disinfection and sterilization after scraping off the diseased skin. 2. Prune off diseased branches, fruits and leaves in the garden at any time.

In the whole growing season, the persimmon orchard with serious disease should be cut off once every 10 days or so, and the persimmon orchard should be burned or buried deeply. The wound caused by pruning is protected with a "callus antiseptic film" to prevent dryness and disease infection. 3. Cut off or uproot the diseased trees that have died or are seriously infected and difficult to save from the ground, and take them out of the persimmon orchard to burn them in a centralized manner.

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We'll be happy to answer for you. The method of the quality bond of persimmon tree anthracnose is as follows: according to the precipitation situation, spray 2 3 times a month, and generally spray 1 500 times of Bordeaux liquid or 1500 2000 times 50 prochloraz and other protective agents before rain.

Spray 2000 3000 times 25% propiconazole EC or 3000 4000 times 80% zebaconazole wettable powder after rain.

Prevention and control measures of persimmon tree anthracnose: Preventing the spread of the disease is a prerequisite for the prevention and control of anthracnose, and timely and appropriate drug prevention and control is the key to the prevention and control of the disease. In this regard, we must do the following:

1. Scrape off the necrotic tissue on the persimmon tree scar in time and bury the necrotic tissue deeply, and apply "Tree Protector" for disinfection and sterilization after scraping off the diseased skin. 2. Prune off diseased branches, fruits and leaves in the garden at any time. In the whole long season, the persimmon orchard with serious disease should be cut off every 10 days or so, and the persimmon orchard should be burned or buried deeply.

The wound caused by pruning is protected with a "callus antiseptic film" to prevent dryness and disease infection. 3. Cut off or uproot the diseased trees that have died or are seriously infected and difficult to save from the ground, and take them out of the persimmon orchard to burn them in a centralized manner.

1. Choose disease-resistant varieties: Generally, persimmon varieties with smooth leaves, thick waxy layer, robust growth, and strong land in Changchun have strong disease resistance, so it is also necessary to follow such conditions in the selection of varieties, which can greatly reduce the probability of persimmon release. 2. Reasonable pruning of branches:

Anthrax mainly occurs in June and July, and the pathogen is used to parasitic on the branches, so it can be removed by proper pruning to reduce the occurrence of the disease. 3. Orchard cleaning and reasonable fertilization: orchard cleaning focuses on removing dead branches and leaves, diseased and insect branches and fruits, etc., and carries out centralized treatment.

In terms of fertilization, do not apply too much nitrogen fertilizer in order to over-pursue the growth effect of persimmon trees, which is easy to cause persimmon trees to grow, weaken the tree, and reduce the ability to resist pests and diseases. 4. Agent**: When the orchard is slightly ill, spray 600 times of 80% mancozeb wettable powder for spraying; When the damage is serious, spray 100 times of 25% prochloraz once, and the spraying time should be after 5 p.m., or cloudy and foggy days.

Summary. Anthrax: The initial lesion is pale yellow and nearly round, and the later lesion** is broken.

In severe cases, the leaves die, the petioles appear light brown stripes, the fruit is infected with light green water stains, and then the middle depression nearly round dark brown lesions appear, and sometimes the surface overflows orange sticky matter or rots. You can choose one of the 600 times dilution of 70 tobuzin, 75 chlorothalonil 500 times dilution, 600 times dilution of chlorothalonil, clomycoline L000 times dilution, 1000 times dilution of Fenghu ammonia, and 500 times dilution of sulfur suspension.

Spraying control Before the persimmon tree germinates, spray 1 time 3 5 Baumé stone sulfur mixture in the whole garden. During the growth period and fruit development period of new shoots, 65% mancozeb wettable powder 600 times, 75% chlorothalonil wettable powder 500 times, 50% methyl tobuzine wettable powder 700 times can be sprayed, and sprayed 2 3 times in a row, which can effectively control the infection of the disease.

After the fruit harvest of the infected source is eliminated, the dead branches, fallen leaves and fallen fruits in the garden are completely removed, the diseased shoots and diseased fruits are cut off, and they are burned intensively. During the growing season, the diseased shoots should be cut off in time, the diseased fruits should be removed, and the ruler should be changed to reduce the source of reinfection.

Fire gourds are prone to what diseases, how to prevent them.

Anthrax: The initial lesion is pale yellow and nearly round, and the later lesion** is broken. In severe cases, the leaves die, the petioles appear light brown streaks, the fruit is infected with light green water stains, and then the middle concave land depression nearly round dark brown lesions, sometimes the surface overflows orange sticky matter or rot.

You can choose one of 70 tobuzin 600 times dilution, 75 chlorothalonil 500 times dilution, 600 times dilution, clochloryl l000 times dilution, 1000 times dilution of fenghu ammonia, and 500 times dilution of sulfur suspension to control imitation heads.

Thanks for the answer. I don't understand the following medication.

If you want to use the medicine, you can buy it back and follow the instructions. Oh.