What are the common diseases of pomegranates? What are the pests and diseases of pomegranate trees,

Common diseases of pomegranate and prevention, coal stain disease This disease has little impact on the overall fruit tree, but if it occurs in a large area, it may affect the growth of the fruit or cause the yellow leaves of the pomegranate.

In fact, strictly speaking, coal pollution disease cannot be regarded as a disease, and the specific manifestation of coal pollution disease is that there will be some black substances on the surface of the fruit or leaves, just like coal pollution, but it can be wiped off by hand. The impact on fruit trees is that what are the common diseases that can affect pomegranate cultivation when they occur in a large area?

The main reason for the emergence of this disease is that there is an insect carrier that stays on the branches of trees or is transmitted through feces. Generally, we can use the method of catching pests to control coal sludge disease, and in the case of not serious cases, we can spray clean water to treat it.

Dry rot pomegranate disease is mainly seen in the environment of high humidity, when the humidity is high, the photosynthesis and respiration inside the fruit will be affected, so that the fruit will rot and necrosis, at the beginning, this disease is manifested in the fruit softens or turns into water, and the fruit slowly begins to dry up in the later stage. This disease has a huge impact on the yield of pomegranates, especially during the flowering period, which may lead to large areas of fruit drop or failure to set fruits, which will lead to reduced yields and affect the profitability of the year.

For dry rot, we should first clean up the orchard. After the winter picking, the garden should be cleaned and pruned in time, and the diseased branches, weak branches and dead branches and fallen leaves should be cleaned and burned or buried deeply. Because most of the diseases of dry rot are hidden on these, this can effectively reduce the number of pests and diseases in the second year.

In addition, the fruit should be cut off and treated in a timely manner after the disease is discovered.

From the name, we can also see that brown spot disease mainly makes the branches and leaves of fruit trees appear a lot of brown spots, and these spots will continue to expand, slowly, the whole leaf will wither and die, so that a large area of fallen leaves and fruits will be formed, affecting the growth of fruit trees. Especially for young fruits, the impact of brown spot is very large, so we must pay attention to it. The prevention and control of brown spot disease is basically the same as that of dry rot.

In addition to spraying the corresponding pesticides in the later stage of discovery, it should also be noted that after the winter harvest, the orchard and fruit trees are managed, and the fruit trees enter dormancy in winter, and many pests and diseases will hide in the dead bark and fallen leaves and dead branches.

In the process of pomegranate tree growth, pomegranate dry rot and pomegranate brown spot are the most common diseases, mainly I harm the fruits and leaves of pomegranates, and you must pay attention to the selection of garnets.

Dry rot pomegranate disease is mainly seen in the environment of high humidity, when the humidity is high, the photosynthesis and respiration inside the fruit will be affected, so that the fruit will rot and necrosis, at the beginning, this disease is manifested in the fruit softens or turns into water, and the fruit slowly begins to dry up in the later stage.

First of all, the common diseases of pomegranates are the insect pest called the stem window moth, which is very harmful to pomegranate branches. Secondly, there is dry rot caused by germs. There is also black spot, which is manifested by many black spots on the leaves, which can cause the pomegranate tree to wither in severe cases.

1.Symptoms of coal stain disease: The object of coal stain disease is the leaf fruit, and a layer of obvious black unknown substance will appear on the leaf surface in the early stage of leaf disease.

However, this layer of unidentified material can be easily erased by hand, and a layer of bituminous coal is attached to the leaves, causing the leaves to be unable to photosynthesize. The main transmission is due to the fact that insects carry the virus and stay on the leaves, leaving excrement, etc., and the incidence is higher in fruit trees with poor permeability and high temperature and humidity. The disease of fruit is similar to that of leaves.

2. Symptoms of dry rot: Dry rot has the possibility of onset in the whole growth period of pomegranates, and it generally occurs more before and after the Dragon Boat Festival. The environment with high humidity is the best environment for dry rot, which will affect flowers and fruits after the onset of the disease, and the flowers will appear dark sunken lesions on the infected area in the early stage of the disease.

In severe cases, it can cause flower drop. After the onset of the fruit, the diseased part becomes rotten, and the water gradually loses and dries out in the later stage, and many small black dots appear at the diseased site. If not treated in time, it will lead to decay during harvest and storage.

3. Symptoms of brown spot disease: The harmful part of brown spot disease is leaf fruit, which will lead to a large number of leaf and fruit drop in fruit trees. When the leaf is infected, it will produce many small dark spots on the surface, and these spots will gradually enlarge and then form lesions of different shapes.

There is a slight depression in the center of the lesion. After the fruit is diseased, similar to the leaves, some black spots will appear on the lesions, and the rotten fruit will fall in the later stage.

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.

Pomegranate flowers, also known as Anguava traces, sea guava, pomegranate, Danruo, Shanli leaves, are dead-leaf shrubs or shrub plants. Pomegranate flowers are a flower species that is the favorite of small bugs. Although pomegranate bonsai is kept at home, there are fewer pests and diseases, and poor maintenance will also attract:

Budworms, budworms, stem window moths, etc. Let's take a look at the pests and diseases of pomegranate flowers and their control methods!

How to take care of pomegranate flower pests after they dry up, pomegranate flower insect pests, pomegranate flower pest control, pomegranate flower common pests and diseases, pomegranate flower pests and diseases: today I will explain to you the cultivation methods and precautions of pomegranate flower and pomegranate flower pests and control methods.

Pomegranate budworm disease.

Budworms are often pests and diseases that often arise when raising flowers at home, and the larvae are key to adhere to the leaves or new shoots, inhale the branches, and metabolize the mucus, cause coal pollution disease, harm plant photosynthesis, slow down the growth and development of guava, cause the leaves to fall, and may cause the death of the flowering tree in more serious cases.

Ways to prevent it. If you find a small number of budworms on the branches, you can wipe them off with soap.

Spray the drug immediately, spray it every 7 10 days, spray it 2 3 times in a row, and you can manipulate the hazard.

Guava stalk window moth.

Disease. It is also called the flower window moth, and it is rarely found in the home. The larvae will damage the new branches and the branches that have grown for many years, so that the growth and development of the plant will be alleviated, and the bloom and fruit will be harmed, and in more serious cases, all the plants will die.

Ways to prevent it. In the growth and development season of guava, often check the growth and development of the branches, if the new branches are found to grow and develop weakly, and sediment, immediately cut off the branches to kill the larvae.

Spray the drug immediately, and use special tools such as waste injection needles to introduce 400 500 times of dichlorvos into the insect tract, or immediately spray on the branches.

Pomegranate flower cotton aphid disease.

Nymphs and nymphs cluster on the young shoots, young leaves, young stems, flower bones and petals of the host, and inhale the branches, causing the leaves to turn yellow and wither, and in more serious cases, the whole tree dies.

Ways to prevent it. Pay attention to spray Baumé 5 degree stone sulfur mixture before entering the house in winter to prevent it.

When the plant has pests and diseases, it is more reasonable to immediately spray 1500 times of 50% aphid ecmulsifiable concentrate or 800 times of 25% imithion emulsifiable concentrate.

Through our introduction, I believe you have a deeper understanding of the common insect pests of pomegranate flowers.