How to control pear tree dry boring pests? What medicine is used to treat pear tree insects

The pests of pear tree dryness mainly include star beetle, large brown wood stupid moth, blue and yellow-eyed longhorn beetle, and pear pattern gilding worm.

1. Prevention and control methods of star-stard beetle and large brown wood stupid moth:

1.Adult worms during the adult development stage.

During the period when the adult worms lay eggs, the trunk is examined frequently. If you find a saliva-like glue, immediately pick out the eggs and crush them with a knife. At the same time, carefully spray 50% phoxanthion EC 1000 times or 20% fenvalerate EC 3000 times, or 3000 times and dichlorvos 1000 times around the trunk to kill the eggs and larvae that have just hatched but are not swallowed by the tree.

3.After the larvae have eaten into the trunk of the tree, there must be live larvae inside where there is fresh droppings outside the cavities. Use thin steel wire and bamboo poles to stab the larvae to death.

If you can't stab it, dip a cotton ball in 400 times dichlorvos and insert it into the cavity, or use 1 spirit to stuff it into the cavity, and then apply the outside with soft mud to suffocate the pest in the hole.

Second, the prevention and control methods of blue-eyed longhorn beetle:

1.Adult worms during the adult development stage.

2.During the oviposition period and larval hatching period of adults, spray 1000 times of 80% dichlorvos emulsion or 2000 3000 times of dichlorvos emulsifiable concentrate every 10 days, or spray insecticides such as phosphine, difluorobenzylurea, fruit rinse and other insecticides to kill adults, eggs and larvae.

3.Whenever you find a tobacco-like floc on a tree, immediately cut it with a knife and stab the larvae to death.

3. Prevention and control methods of pear-striped gilding:

1.During the oviposition period, 1000 times of 80% dichlorvos EC or 2500 times of deltamethrin EC are sprayed once every 10 days, especially on the trunk and branches, to kill the adults, eggs and larvae that have just hatched but are not swallowed by the branches.

2.When the pupa is about to emerge into an adult and does not dry, scrape off the outer layer of coarse warped bark, burn it intensively, and then use 1 part of acetamide powder or imidacloprid powder, mix 300 parts of cement or sticky mud, carefully paint the trunk, and seal it and poison it in the bark.

Choose the right varieties for planting, try to choose some disease-resistant varieties, check the trunk for some special items, need to clean up in time, sprinkle pesticides, and be sure to pay attention to fertilization.

If you want to control pests, you need to spray pesticides several times in the spring and summer, and pay attention to the sun exposure, so that you can control the pests.

You can go to the agricultural material station to buy some pesticides and spray them on the pear tree, you should also prune off the branches and leaves with insect pests, water more, and you should also increase the time of sun exposure so that you can prevent insect pests.

Summary. Pro, the drugs used to treat insects in pear trees are: emamectin chlorpyrifos, perchloroemectin benzoate, cypermethrin, cyhalothrin, chlorpyramide No. 3, insect mite light, etc.

In the selection of insecticides for the control of pear heartworm, 3000 times avermectin, 1500 times chlorpyramide 3, 1000 times cyhalothrin, 3000 times matrine, 2500 times bromopermethrin, 3000 times chlorantranid, 3000 times sulfurozide, chlorantraniliprole, filupidamidide, benzamide, etc.

Pro, the drugs used to treat insects in pear trees are: emamectin chlorpyrifos, perchloroemectin benzoate, cypermethrin, cyhalothrin, chlorpyramide No. 3, insect mite light, etc. In the selection of insecticides for the prevention and control of pear heartworms, 3000 times avermectin, 1500 times chlorpyramide No. 3, 1000 times cyhalothrin, 3000 times matrine, 2500 times bromopermethrin, 3000 times chlorantran, 3000 times thuringizid, chlorantraniliprole, sulfluramide, benzamide, etc.

Are these okay?

Yes.

The insect is a major leaf-eating pest of pear trees, and its larvae damage leaves, flower buds and flower buds twice a year. The prevention and control measures are as follows:

1. Usually once in March and April and once in August and September.

2. Common agents such as 50% phoxanthion emulsion 1000 times, or 20% pyrethrin emulsion 3000 times, or 50% malathion emulsion 1000 times and 50% pyridoxine emulsion 1000 times can be used for spraying control.

There are also common names such as flower drills, white diamond insects, etc. The insect only harms pear trees, generally in mid to late May, and the larvae eat the fruit. A generation is produced every year, and the adults emerge and lay eggs between April and May, and the peak of pear spawning is when the inflorescence of the pear tree separates and the flower buds are ready to be released.

The specific prevention and control are as follows:

1. Take advantage of the feigned death characteristics of the adult insects, receive a cloth order under the canopy of the pear tree, and vibrate the adult insects to kill;

2. During the spawning period of the pear fruit peak, manually remove the young fruit with eggs and insects;

3. About 10-15 days before the pear tree blooms, that is, when the adults are about to emerge, it is necessary to use 25% parathion 300 times liquid, or you can choose Lesben emulsifiable concentrate 600 times liquid and other agents to be controlled by ground spraying, focusing on the range within 1 meter around the trunk.

The insect will cause harm to the leaves and shoots of pear trees, and will also induce soot disease, resulting in leaf loss, fruit drop, and fruit degradation of pear trees, which will have a greater impact on the yield of pear trees. The prevention and control are as follows:

It can be controlled by 1250 1500 times more insect mites, or 3000 times more.

1. Prevention and control of scab in pear trees.

Pear scab, also known as scab disease, is highly prevalent, pear scab is the main disease of pear trees, and the young tissues of pear trees are particularly susceptible to infection. It is an important disease that occurs in the northern and southern pear areas of China and has a large loss, from the flowering stage to the fruit ripening stage.

Prevention and control: the combination of thinning flowers and fruits and pruning diseased shoots can prevent the disease of pear trees to a large extent; 7-10 days after the pear tree falls to flower, use 40% Fuxing 8000-10000 times for control; For already diseased pear trees, it is necessary to spray 800 times with 80% mancozeb.

2. Prevention and control of pear rust in pear trees.

Pear rust is also known as red star disease, and rust on pear trees can damage pear leaves, new shoots and fruits. The leaves of pear rust begin to show small yellow spots, which gradually expand into oval shapes, and in the later stage of pear tree infection, the leaf spots of pear trees turn black and die.

Control: From the leaf development of the pear tree to the young fruit stage, spray 40% Fuxing diluted 8000-10000 times solution every 10 days or so, and 2-3 times can restore the pear tree's health.

3. Control of pear psyllids in pear trees.

Under normal circumstances, the disease species of pear psyllid does not cause serious harm, and only in the scenic areas and urban suburbs where more juniper trees are planted near the orchard, and the damage is serious, and it occurs in the north and south of China. It can not only harm pear trees, but also cause harm to plants such as begonia pear stems, begonias and hawthorns. Adult pear psyllids can damage the leaves and shoots of pear trees, and induce soot disease in pear trees, resulting in leaf loss, fruit deterioration and even a decrease in fruit yield of pear trees.

Control: Spray pear leaves and branches with insect mites 1250-1500 times** 3000 times more. It is also possible to use the method of artificial insect trapping on pear trees.

4. Control of pear tree pear yellow mealy aphid.

The larvae and adults of P. pearis mainly feed on the fruit of the pear tree and reproduce in the fruit of the pear tree. The affected pear tree fruit will have small yellow and sunken spots, which will gradually turn dark brown.

Control: From March to May, the overwintering eggs hidden on the pear tree can be eliminated by scraping the bark of the pear tree; After the overwintering eggs hatch and in late June, the pear trees can be sprayed with 25% fast killing 1500-2000 times.

Hello dear, pear trees can be threatened by a variety of pests during the growing season. When treating pests in pear trees, we need to choose the right medicine according to the type and severity of different pests. Here are a few common pesticides for pear tree pests:

1.Sky blue slime: This is a broad-spectrum insecticide, mainly used to control pests and pathogens such as peach seedling aphid, disinfection root aphid, and yellow warbler.

2.Dichlorvos: It is an organophosphate insecticide.

The agent can simultaneously kill pests such as a variety of inchworm insects and citrus red spiders. 3.Dythocarb:

Also known as imidacloprid, it is a new and highly effective insecticide suitable for the control of pests such as green blind bugs. 4.Carbofuran:

It is a broad-spectrum fungicide that can be used to prevent and ** fruit black spot and other fungal diseases. It is important to note that all agents should be used correctly according to the instructions on the instructions and follow the principles of safe administration of agricultural Class B agents. When using the agent, care should be taken to avoid unnecessary harm to the environment and human beings, and thorough cleaning and treatment should be carried out after use to prevent residual chemicals from causing certain pollution and loss to the pear tree and the surrounding environment.

1. Pear scab: When preventing and treating diseases, it is necessary to choose pear tree varieties with good disease resistance. 2. Pear ring disease:

In autumn, remove fallen leaves and spray pear trees with potassium permanganate. 3. Dry rot: Cut and thin the branches and leaves of the pear tree that grow too densely.

4. Pear rust: spray water on pear trees for humidification in hot weather.

1. Pear scab

The pests and diseases of pear trees are pear scab, pear scab is a quarantine disease, this disease will parasitize in the bud scales of pear trees in the form of spores and mycelium, and when preventing pear scab, it is necessary to choose plum tree varieties with good disease resistance when planting, so as to reduce the probability of infection of plants.

2. Pear ring disease:

Pear ring disease is a weak parasitic bacteria, with the characteristics of fast onset and great harm, it will make the pear tree appear a large area of fruit rot, the prevention and control of pear tree pear ring disease, it is necessary to clean up the fallen leaves and fruits in autumn and winter, and scrape off the old skin of the plant, and then spray potassium permanganate for disinfection.

3. Dry rot

Pear trees will be infected with dry rot, dry rot will make long strips of black-brown lesions appear on the branches of the plant, and will cause the trunk of the pear tree to die, when preventing dry rot, it is necessary to cut the branches and leaves of the pear tree that grow too densely to improve the light transmission and ventilation between the plants.

4. Pear rust

Pear rust, also known as red star disease, is the most harmful pathogen of pear trees, which will cause a large number of leaves and fruit deformities of the plant, when preventing and controlling pear rust in pear trees, it is necessary to spray water mist around the plant in high temperature weather to humidify, and spray fungicides every 10-15 days to make the pear tree grow healthily.