About the diseases of pomegranates 5, about the diseases of pomegranates

That's because the small bugs crawled in through the opening (as shown in the picture, the blackened bottom of the pomegranate is caused by the damage of the insects, and the inside is rotten). I also have a pomegranate tree at home, and many of the pomegranates that were produced last year are like this, which are caused by small flying insects with wings that crawl into it. My mother bought a little insecticidal powder, mixed it in the mud, and then plugged the hole with mud, which worked.

The internal decay of pomegranate fruit is mainly caused by rainwater entering the peel after being damaged by the "peach heartworm". The prevention and control of "peach heartworm" is fundamental, and it is generally necessary to spray peach spirit emulsifiable concentrate and other prevention and control.

The main pest control of pomegranate trees.

1 Pomegranate dry rot.

1 1 Symptoms.

The disease mainly harms the fruit, but also infects the branches, the young fruit is susceptible to the disease generally around the calyx tube bean grain size light brown lesions, gradually expanding, until the whole fruit rots, 7-9 months the fruit sticking to the leaves under the lesion is prone to disease spots, after the fruit of the disease loss into brown stiff fruit. During the storage period, the fruit can rot, and dense small black spots can be produced on the fruit surface; The branches are damaged, the bark becomes dark brown and dry, and the small black spots on it are dense, and the junction between the sick and the healthy is often cracked, and the diseased skin is warped, so that it is peeled off, the diseased branches are weakened, the leaves turn yellow, and the upper part dies quickly.

1 2 Prevention and control measures.

1) Strengthen cultivation management and improve the disease resistance of trees;

2) Clean the orchard, and prune it in winter to remove diseased branches and rotten fruits; In summer, the diseased fruit should be removed at any time, buried deep or burned;

5) Scrape off the diseased spots on the branches and bury the lesions deeply, and apply pesticides to protect them, such as Fumei arsenic;

6) Pharmaceutical prevention and control, spray 3-5 ° stone sulfur mixture in early spring, spray 1:1:160 Bordeaux solution between May and August, 80 Dasheng m-45 solution, 40 carbendazim solution, etc., spray once every 15-20 days, the effect is better.

2 Pomegranate brown spot disease.

2 1 Symptoms.

The leaves are small black-brown spots at first, nearly rounded after expansion, and the edges of the lesions are black to black-brown, slightly convex, and gray-brown in the middle; The symptoms on the back of the leaf are the same as those on the front, the lesions on the fruit are nearly round or irregularly shaped, black and slightly concave, and there are also gray velvety small spots, and the outer edge of the lesions is pale yellowish white after fruit coloring.

2 2 Prevention and control measures.

1) Strengthen cultivation management, reasonable pruning, and enhance tree potential;

2) Clean the orchard, burn or bury the fallen leaves and fruits in the orchard after the leaves are dropped;

3) For the prevention and control of pesticides, use 140 times the equivalent Bordeaux liquid or 80 ultra-micro carbendazim solution to spray once in the early stage of the disease, and the control effect can reach more than 80, and the effect is better if sprayed 3 times in a row.

3 Peach borer.

3 1 Biological characteristics.

This insect occurs in 2 to 3 generations in 1 year, and has a long occurrence period, and the larvae of the first generation damage the pomegranate the most, and the fruit of sunflower and corn begins to damage from the second generation. Overwintering with mature larvae, overwintering in May of the following year for adult emergence, lying in the shade during the day, active at night; The eggs are mainly laid in the pomegranate calyx, and the hatched larvae mostly eat in the calyx tube or in the double fruit or the leaf or burrow into the fruit. The larvae have the characteristics of turning into the main harm, and the larvae mostly form cocoons in the damaged fruit or between the fruits and in the cracks of the bark after they are old and mature, and pupate in the cocoon.

pharmaceutical prevention and control; During the adult occurrence period, 50 pesticides of pine borer emulsion were sprayed, and the insecticidal rate was more than 90 on the 5th day after field application. In the first generation of eggs and larvae incubation stage, spray 50 octathion or 90 trichlorfon solution 1-2 times, the effect is better.

Pomegranate pest control can be sprayed. Pomegranate stem window moth: also known as flower window moth, borer (also known as two borer, three borer), is one of the main pests of pomegranate trees, larvae borer as a damage to new shoots and perennial branches, affecting fruit yield and quality (character), serious can cause the death of the whole plant.

The way to prevent it is to spray a pesticide, such as Jia Meiling wettable powder, some to go, but it is best not to use dimethoate or dichlorvos pesticides for pomegranate trees, because it is a relatively sensitive plant.

After the pomegranate tree enters the winter, it is generally the winter pruning stage, after the pruning of the pomegranate tree, for the wound part of the pruning of larger branches, some protective agents can be applied to protect the wound healing and prevent the infection of germs. Strengthen tree management, improve the ability of trees to resist diseases, clean the orchard, and do not leave diseased branches and rotten fruits. Winter pruning will clean the diseased branches, and the wound will be protected by medication; In summer, the diseased fruits are removed in time, buried deep or burned.

Pomegranate dry rot, pomegranate dry rot is a fungal disease, which occurs more in Shandong, Henan, Anhui, Sichuan, Shaanxi and other places in China's pomegranate producing areas. The most suitable temperature for pomegranate dry rot is 24 28 degrees, and it is easy to get sick under high temperature and high humidity environmental conditions. After the pomegranate has set the fruit, it is necessary to bag it.

After fruit set, bagging strengthened cultivation management, balanced fertilization, artificial pollination, erasing bell-shaped flower buds, reasonable pruning and other measures to improve the disease resistance of trees, promote fruit preservation and disease prevention, clean up orchards, and remove infection sources. The method of mulching the tree disc is used, that is, before the overwintering larvae are unearthed, the ground of the tree disc is covered with mulch, and at the same time, the mulch is tied around the trunk. Mulching prevents the overwintering adults from flying out to lay eggs, thus preventing the fruit from being damaged by the adults.

Use 140 times the equivalent amount of Bordeaux solution or 80% ultra-micro carbendazim solution to spray once at the beginning of the disease.

In the process of pomegranate growth, the prevention and control of pests and diseases is the main task, so how to prevent pests and diseases of pomegranate trees?

The main focus should be on two consecutive fruiting periods, the first for insect control and the second for disease resistance. Pomegranate trees are prone to pests such as moths, bugs, and twill fluttering moths from the end of April to the beginning of the month and the middle of the month. The main diseases after fruit set are white rot, black pox and anthracnose.

1.Control before results.

Apply twelve milliliters of diluted tri-tri% methoprimem emulsifier on the front and back of the pomegranate tree. If there are still insects every other three to five days, spray the front and rear leaves with 1,500 times diluted 1,500 grams of 2.5% aphid wettable powder, and then cross-spray every two weeks. June and July of each year is the peak period for the occurrence of peach heartworm in pomegranate trees, which is very harmful to pomegranate trees if not controlled in time.

When the fruit is eaten by the peach heartworm, it will be hot and rainy, and the wormhole will be full of water, causing the pomegranate to gradually rot, and the damage rate will reach more than 60%. At this time, it is necessary to use 50% octathion emulsifiable concentrate, dilute 800 times and mix it with mud on the flower stalk, or use dichlorvos to spray 2,000 times. To avoid the spread of the peach heartworm parasite, the leaves around the pomegranate fruit should be removed.

2.Control after results.

Spray trichlorfon, pyrethroid, etc. Control of borers and putrescine.

chlorpyrifos, chlorpyrifos, etc. It can effectively control moths.

After the leaves fall to March of the following year, remove the fallen leaves in the garden, remove the diseased fruits, dead fruits, and dead leaves on the trees, and burn or bury them in a centralized manner, so as to remove the source of overwintering diseases. Scrape off the dry rot spots on the branches and bury them deeply, and apply a protective coating, as in general tree care.

Additional Knowledge:Good winter garden cleaning to remove overwintering pests and diseases is the key measure to reduce pomegranate pests and diseases. Prune pomegranate trees in winter, after the leaves fall and before budding.

Focus on removing rootstocks and long, dense, weak, diseased, and insect-rich branches, drooping branches, crossed branches, and overlapping branches. Wounds caused during pruning can be coated with a healing and antiseptic film to form a protective film on the tree, protecting the healing tissue from growth and preventing disease invasion.

1. Disease: Mainly for prevention, spray a dose of Bordeaux liquid solution every half a month, which can play a preventive measure. When the disease is serious, fungicides such as antibacterial and carbendazim can be used.

2. Insect pests: When found, they should be manually removed in time, and then cut off the insect branches and spray according to the types of pests.

First of all, when planting, we must choose the soil is more fertile and broad land, and we must use farmhouse fertilizer when fertilizing, do not use the fertilizer bought outside, and often water the plants, but also to prevent the occurrence of pests and diseases, if there are small insects, then we must spray insecticides in time. I think that if we can do a good job in these aspects, we will definitely be able to prevent pomegranate trees from showing pests and diseases.

We must ensure soil fertility, water and fertilize as soon as possible, prune branches and leaves in time to prevent pests and diseases, and use pesticides after pests and diseases appear.

Symptoms Dry rot can occur from budding until fruit ripening, with the peak incidence in May and June. When the disease occurs, it harms the flowers, flower stalks, and fruits, and when the disease is severe, it will cause the pomegranate flowers to fall off early. The diseased part becomes grayish-black, fluffy, and gradually loses water and shrinks, and many small black spots will appear in the later stage, causing the fruit to rot.

Control methods Strengthen maintenance, increase phosphorus and potassium fertilizers to improve the disease resistance of pomegranates.

Clean and prune in time, and cut off diseased branches and rotten fruits in time to avoid bacterial infection. Keep warm in winter to avoid frostbite.

If the disease is found, the diseased plant should be removed in time, and the stone sulfur mixture should be sprayed, and 1:1:160 Bordeaux solution should be sprayed from May to August, once every 15-20 days.

Symptoms Coal stain disease mainly harms leaves and fruits, black hyphae will appear on leaves and fruits, and a layer of bituminous coal will stick to the leaves, affecting photosynthesis. The main cause of coal pollution disease is insect feces and secretions, which occur in an environment with poor ventilation, high temperature and high humidity.

Prevention and control methods During the maintenance period, proper pruning, timely ventilation, ensure good light transmission, appropriately reduce humidity, and avoid stuffy environment.

Do a good job of prevention, spray stone sulfur mixture during the overwintering of pomegranates, and eliminate the source of overwintering. Spray dimethoate 1000 times liquid in a timely manner to prevent pest breeding.

When the plant is diseased, spray 500-800 times of ammonium dyssen, spraying 4 to 5 times.

Symptoms Pomegranate brown spot is a fungal disease that mainly damages leaves and fruits, resulting in flower and fruit drop. After the leaf is damaged, small brown spots appear at first, which gradually spread to a round shape, the edges are black, and the back of the leaf is also covered with diseased spots. Black-brown lesions will also appear on the fruit, and the outer edge of the lesions will be pale yellowish-white after fruit coloring.

Prevention and control methods Remove diseased leaves and dead branches in time and burn them intensively to reduce the source of bacteria.

Strengthen maintenance, reasonable watering, keep the potting soil slightly moist, and enhance the disease resistance of plants. Spray Baumé 5 degrees stone sulfur mixture before germination in spring, and spray 140 times the same amount of Bordeaux liquid after new shoots germinate to take precautions. Spraying began in late May, with an interval of 10 days for 6 to 8 sprays.

Pomegranate flower dry rot.

Symptom. Dry rot can occur from bud break to fruit ripening, with a peak in May-June. When diseases occur, they damage flowers, peduncles and fruits.

In severe cases, pomegranate flowers fall off early. The disease turns grayish-black, softens, and gradually loses water, and many small black spots will appear in the later stage, causing the fruit to rot.

Prevention and control methods. Strengthen maintenance, increase the application of phosphorus and potassium fertilizers, and improve the disease resistance of pomegranates. Clean up and prune in time, and cut off diseased branches and rotten fruits in time to avoid bacterial infection.

Keep warm in winter to avoid frostbite. When the disease is found, remove the diseased plant in time, spray the stone sulfur mixture, and press 1:1 from May to August

Spray Bordeaux liquid at 160 percentages every 15-20 days.

Pomegranate flower coal stain disease.

Symptom. Coal stain disease mainly affects leaves and fruits. Black hyphae will appear on the leaves and fruits, and a layer of bituminous coal will stick to the leaves, affecting photosynthesis. The main causes of coal pollution disease are insect feces and secretions, which occur in poorly ventilated, high temperature and humidity tremors.

Prevention and control methods. During the curing period, prune properly, ventilate in time to ensure good light transmittance, appropriately reduce humidity, and avoid stuffy environments. Take precautions.

During the overwintering period of pomegranates, stone sulfur mixture is sprayed to eliminate the source of overwintering. Spray dimethoate 1000 times in time to control insect pests. When the plant is sick, spray 500-800 times of ammonium dysony, and spray 4-5 times.

Pomegranate brown spot disease.

Symptom. Pomegranate brown spot is a fungal disease that mainly damages leaves and fruits, causing flower and fruit drop. After the leaf is damaged, small brown spots appear at first, which gradually spread into round, the edges are blackened, and the back of the leaf will be covered with diseased spots.

Dark brown spots will also appear on the fruit, and the outer edge of the spots will be yellowish-white after the fruit is colored.

Prevention and control methods. Remove diseased leaves and dead branches in time, and burn them intensively to reduce the source of bacteria. Strengthen maintenance, reasonable watering, keep the soil in the pot slightly wet, and enhance the disease resistance of plants.

Spray Baumé 5 degrees stone sulfur mixture before germination in spring, and spray 140 times the equivalent Bordeaux liquid after germination of new branches to take preventive measures. Spraying began in late May, with 6 sprays every 10 days.

Summary. Pro, the control and medication of pomegranate tree pests and diseases: aphids:

Before fruit set, spray the front and back of pomegranate leaves with 33% chlorinated emulsifiable concentrate. 2. Peach borer: In June and July every year, use 50% phosphine emulsifiable concentrate, dilute 800 times and mix with mud to paste on the flower stalk.

3. Peach heartworm: pick up the insects and fruits on the trees and the ground and bury them deeply. 4. White rot:

Spray an equal amount of Bordeaux solution every half month or so, diluted 200 times.

Control and medication of pomegranate tree pests and diseases.

Pro, the control and medication of pomegranate tree diseases and pests: aphids: spray the front and back of pomegranate leaves with 33% chlorinated emulsifiable concentrate before fruit set.

2. Peach borer: In June and July every year, use 50% phosphine emulsifiable concentrate, dilute 800 times and mix with mud to paste on the flower stalk. 3. Peach heartworm:

Pick up the insects and fruits on the trees and the ground and bury them deeply. 4. White rot: spray the same amount of Bordeaux solution diluted 200 times every half month or so.

What is this disease.

Dear, it's white rot.

After the pomegranate tree sets fruit, the main diseases are white rot.

Sickness. Is it a drug hazard?

It's not a drug hazard. How**?

White rot: Spray an equal amount of Bordeaux solution every half month or so to dilute 200 times.

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