How to treat the dry rot of begonia trees, and what medicine to use for begonia tree diseases

Begonia bark opens from early June to form a scaly natural falling cortex; In early to mid-July, the tissues of the fallen cortex gradually change color and die. Summer is the active growth period of trees, and it is not a favorable time for the spread of pathogens and diseases. However, the litter layer provides good conditions for the invasion of decay pathogens into the bark, and the pathogens that invade the bark of Begonia trees expand first, resulting in some superficial ulcer spots in the litter. From late October to November, the begonia tree gradually enters the period of eye rest, the vitality is weakened, the activity of the fungus is strengthened, and on some surface ulcers, the bacteria penetrate the lower periderm and invade the healthy tissues, forming several necrotic points.

**Method: 1. Drug treatment.

In severe cases, the necrotic tissue of the diseased part of the trunk is scraped first, and then the lesions are coated with 50 times of 50 times of antibacterial special solution or the antiseptic agricultural antiseptic 120 made of biological agents. At the same time, you can refer to the drug prevention and control methods of apple tree rot disease.

2. Mud application prevention and control.

Take fresh soil and mix it with water, the degree of wetness is that the hand is kneaded into a ball to adhere to the bark, apply 3 5 cm on the scar of the fruit tree, and then wrap it tightly with plastic film to prevent evaporation and soil shedding. After 1 year, the plastic film and mud are removed. In this way, the good gas germs will suffocate and die due to long-term lack of oxygen.

The rate of this method is above 90.

3. Sterilization of garlic liquid.

Mash the garlic into garlic puree, add 10 salt water in a ratio of 1 to 1 to prepare garlic liquid. When using, first scrape the scar, and use a small brush or brush to apply garlic liquid to the scar wound, and the surrounding area should exceed the scar 3 5 cm. Apply 1 more time after 10 days.

The rate of this method can reach more than 95.

Begonias mainly have rot disease, flower rot, scab disease, aphids, canopy caterpillars, red spiders, etc.

Prevention and control measures. 1. Hang out the rot disease area and apply 100 to 300 times of arithmetic and liquid calcium fertilizer.

2. Cut off diseased fruits, diseased branches and diseased flowers on the canopy, and spray insecticides such as larvaurea, gonggong methrin, imidacloprid and fungicides such as allicin, chlorothalonil, azoxystrobin, difenoconazole and so on.

From mid to late March to mid-April, it is necessary to prevent rot disease, scab disease, gidding worms, red spiders, and moths from begonias.

Prevention and control measures: 1. Scrape off the diseased spots or seriously injured bark. It is used to apply the arithmetic to the diseased area, and after one week, it is applied with 10% alkaline water.

2. Use 500 times of 80% dichlorvos emulsifiable concentrate to smear chicken bites and insect spots to kill overwintering larvae.

3. Use avidafen, avermectin, difenoconazole, etc. to control red spiders, gray star disease and other pests and diseases.

Late April to early May. It is mainly used to control the rot disease, aphids, canopy caterpillars, leaf roller moths, and red spiders of begonias.

Prevention and control measures: 80% dichlorvos emulsifiable concentrate, 1500 times liquid or 3000 times of kung fu pyrethrin solution or 20% 3000 times of rapid dichloride dichloride can be sprayed. Or spray 20% chrysanthemum emulsifiable concentrate 2000 times. There are also chlorvaluron, pyridoxine, and full of special can be used.

Mid-to-late May is only mid-to-mid-June. Mainly rot diseases of begonias, beetles, spider mites, gray spots, brown spots and wheel spots.

Prevention and control measures: It is still necessary to dig out the decaying parts and apply fungicide. For insect pests, it can be sprayed with thimethrin, Ruijinte, fiprofenin and dinotefuran. For diseases, chlorothalonil, difenoconazole, amicida, etc. can be used.

Late June to September. The main control objects are heartworms, scab, yellow thorn moths, caterpillars, noctuidae and other pests.

Control measures: In early June, phosphine powder can be sprinkled on the ground. The tree can be sprayed with 25% chlorpyramide, 30% peach spirit, 20% pyrethrin, 5% cypermethrin, kung fu emulsifiable concentrate and the use of sweet and sour liquid booby-trap.

This question is the same as "what medicine do people use when they are sick": people should be prescribed the right medicine when they are sick, and peanut insects should also be prescribed the right medicine! Only by taking a picture of the insect can we know what kind of insect it is and design a control method. By the way:

This question belongs to "agricultural science".

Rose begonias, the most susceptible diseases, can be solved by going under water.

Summary. Choose a good nursery site. It is advisable to choose plots with loose soil, fertile, good irrigation and drainage conditions for seedlings, try to avoid heavy cropping nursery land, and plots that have been planted with vegetables, beans, melons, cotton, and potatoes for a long time are not suitable for Eucommia ulmoides nursery land.

Increase the application of organic fertilizer and soil disinfection. In winter, before the soil freezes, apply enough fully decomposed organic fertilizer, and at the same time add tons of ferrous sulfate (alum) per hectare to fully disinfect the soil. Acidic soil can also be disinfected by sprinkling tons of lime per hectare.

Pesticide control: seedlings should be sprayed in time at the beginning of the disease to control the spread of the disease, with 50% methyl tobuzin 400 800 times solution, antibacterial special 500 times solution; 25% carbendazim 800 times liquid irrigation, all have good disease prevention effect. Young trees should also be sprayed in time after the onset of the disease, for the seedlings or young trees that have died, they should be immediately dug up, the plants should be burned, and the disease should be fully sterilized and disinfected.

How to treat the root rot of begonia seedlings.

Hello, I am helping you to inquire about the relevant information and will reply to you immediately.

The main cause of root rot of begonia is soil clay weight, excessive water, poor aeration, etc., to strengthen water management, do a good job of loosening the soil, aeration, to ensure the normal development of the root system, the use of 600 times of the Jiasto, Dixon, etc. to irrigate the roots, the root system has been completely rotten plants to uproot, and the soil is treated with pesticides to kill the rot bacteria.

It is a weeping begonia, and now there are six or seven males, field seedlings.

Choose a good nursery site. It is advisable to choose plots with loose soil, fertile, good irrigation and drainage conditions for seedlings, try to avoid heavy cropping nursery land, and plots that have been planted with vegetables, beans, melons, cotton, and potatoes for a long time are not suitable for Eucommia ulmoides nursery land. Increase the application of organic fertilizer and soil disinfection.

In winter, before the soil freezes, apply enough fully decomposed organic fertilizer, and at the same time add tons of ferrous sulfate (alum) per hectare to fully disinfect the soil. Acidic soil can also be disinfected by sprinkling tons of lime per hectare. Pharmaceutical prevention and control:

At the beginning of the disease of seedlings, spraying should be done in time to control the spread of the disease, with 50% methyl tobuzin 400 800 times and 500 times of antibacterial; 25% carbendazim 800 times liquid irrigation, all have good disease prevention effect. Young trees should also be sprayed in time after the onset of the disease, for the seedlings or young trees that have died, they should be immediately dug up, the plants should be burned, and the disease should be fully sterilized and disinfected.

What disease does the begonia tree have and how should it be treated?

Hello, dear, begonia trees mainly have rot disease, flower rot, scab disease aphid, canopy caterpillar, red spider and so on. The measures to prevent and control late drafts are: 1. Hang out the rot disease site and apply 100 to 300 times of arithmetic and liquid calcium fertilizer.

2. Cut and crack the diseased fruits, branches and flowers on the canopy, and spray insecticides such as larvaurea, gongfu pyrethrin, pyramaprid and fungicides such as allicin, chlorothalonil, azoxystrobin, difenoconazole and so on.

This is begonia rot, also known as rot skin disease, which is more common on apples in the Rosaceae family. It can cause the trunk and treetop cortex of begonias and other trees to rot.

**You can scrape off the diseased spots, taking care to scrape them clean until you scrape off some fresh bark around them. The wound is then smeared with 40% formamine arsenic wettable powder, 843**, 5 Baumé stone sulfur mixture, or fresh cow dung.

The trunk is whitened in March-April and August every year, which can have a certain control effect, and the trunk should also be whitened before the arrival of winter.

The network buffer has been buffered for a long time and I haven't seen a big picture. Most of the trees are fungal infections, and I don't know how to treat them.

What is branch rot disease?

Rot disease is also known as rot disease, and fruit tree rot disease is also known as rotten skin disease, stinky skin disease, etc., which occurs all over the world. The rot disease mainly harms fruiting trees and old trees, and young trees and seedlings can also be harmed, but the incidence is less. In the early stage of the disease, it is not easy to identify from the outside, if the epidermis of the branch is lifted, you can see dark brown reddish-brown moist spots or yellow-brown dry spots, and sometimes, the internal lesion area is large, and it is still difficult to identify from the outside.

When the damage is severe, the cortex decays and dies, and it sinks when pressed with the fingers. The diseased skin is very easy to peel off, the rotten skin layer is reddish-brown, and the wet rot has a distiller's lees smell from time to time. In the later stage of the disease, the diseased part loses water and shrinks, becomes black-brown and sags, and produces small black-brown dots, that is, the conidia of the pathogen, which becomes the source of infection for recurrence.

In addition to the branches, sometimes the fruit is also infected. The lesions on the fruit are dark red round or irregularly shaped, with ring lines and clear edges. The diseased part is rotten and soft, with a slight smell of sake lees, and the skin of the diseased fruit is easy to peel off.

As the tree grows older and bears more fruit, the incidence of rot disease increases year by year.

Prevention method: Before the onset of the disease, dilute the main stem and branches with pepper (30% allicin) at 100-300 times.

1) Strengthen operation and management, timely pruning and thinning, ventilation and light transmission, and improve plant stress resistance.

2) Cut down the diseased plants and burn them in time to reduce the pathogens.

3) Select local tree species with strong stress resistance to create mixed forests.

**Scheme: When the lesions and mycomas on the branches are slightly ill, carefully scrape off (except for peaches, apricots, and plums, only a few vertical and horizontal scrapes are required), when scraping off, it is required to scrape 1cm horizontally, and scrape off 3 cm more longitudinal skin, and then use the original solution of exacerbium (30% allicin) to evenly coat, calcium and selenium are diluted and sprayed according to 800 times of the solution, and the drug is used once every 10-15 days; When the condition is severe, the interval is about 7 days, apply it again with the original solution of Jihe (30% allicin), after the cutting and sawing is treated into a smooth plane, it can be applied directly, and the thiamyone is diluted with 800 times the solution, and sprayed once every 7-10 days.

1. Reasonable load, need to sparse flowers and fruits.

2. Apply more organic fertilizer, control the amount of nitrogen fertilizer, and reasonable topdressing and watering.

3. Scraping: the preferred drug - methionaphthalene acetic acid, followed by bacterioclear, 843** agent, etc.