Which pesticides are susceptible to pesticide damage to peach trees?

Among northern tree species such as apples, pears, peaches, and grapes, peaches have the worst resistance to pesticides. It has allergic reactions to a variety of pesticides, especially to organophosphorus preparations, copper preparations and some sulfur preparations. Among them, dichlorvos, trichlorfon, dimethoate, dimethoate oxide and other organophosphorus pesticides are sprayed in front of the peach hard core, which has a strong effect of thinning flowers and fruits, so it is forbidden to use this kind of pesticide before the peach hard core, especially during the flowering period, and if it is used in the later stage, the concentration should be appropriately reduced, so as not to cause pesticide damage, causing flower and fruit fall and leaf drop.

Bordeaux liquid is a copper preparation, which is a prohibited agent on peach trees, and it is easy to cause serious perforation and a large number of defoliation in peach leaves after use. Peach trees are also very sensitive to stone sulfur mixture and some organic sulfur preparations (such as abam), and are mostly used before the flowering period in production, such as strictly controlling the concentration of use and avoiding high temperature weather during the growth period, otherwise it is easy to cause leaf perforation and fall off, and the fruit surface is rough and atrophied; Use during the flowering period will produce a strong flower and fruit thinning effect. Peach trees are also very sensitive to atrazine herbicides, and peach orchards should not be used, otherwise it is easy to cause yellowing of leaves, and in severe cases, it will cause leaf and fruit drop.

There are many common fruit trees in China, but the most common fruit tree in my hometown is the peach tree. Peach trees are planted in a wide range of areas, and they produce a lot of fruit, and they are sold in large quantities at the beginning of June every year, making them very popular in the market. But when planting peach trees, they will also be affected by some pests and diseases, so what pesticides are better for peach trees?

1. Engine oil emulsion.

Engine oil emulsion is also known as cocoa, and its main control objects are many, including mulberry white scale nymphs, aphid eggs and hatchling nymphs, and overwintering mites. Experts explain that this pesticide has a very good control effect on these types of insects, and only needs to be sprayed once to kill these insects. We need to know that if these insects are allowed to grow on the peach tree, then the peach tree will lack nutrients, and the fruit will not be delicious, and it will also be full of insect eyes, which will also affect the wheat.

There is also a certain concentration ratio when using, after the peach buds germinate, 95% oil emulsion 100 times 150 times liquid, spraying this liquid on the surface of the peach tree, can play an effective preventive role.

2. Phanthion.

Phosphine is also known as nitrile pine and oxime thion, and the insects prevented by this pesticide are insects that are unearthed during the winter, such as beetles, which will hide in the ground in winter, and will come out when everything recovers in spring, causing certain damage to peach trees. So you have to kill these bugs when they first come out, because they are still very weak at this time. There are also some things to be aware of when using this pesticideFor example, these pesticides have contact killing, stomach toxicity, fumigation effects, and are easy to photolyze when seen in light, so they should be sprayed in the evening or on cloudy days.

It is highly toxic to fish, bees and natural enemies, and cannot be mixed with alkaline drugs.

3. Summary. There are many commonly used pesticides in peach trees, such as imidacloprid, high-efficiency chlorine, cyfluthrin, and miteThey are very effective in the pest control of peach trees, but there are also many precautions in the process of use. I won't introduce much here, if you are interested, you can check how to use them.

This depends on the growth stage of the peach tree, spray the sulfur mixture when it first sprouts, spray carbendazim before flowering, and spray cypermethrin after flowering, so as to ensure the healthy growth and development of the peach tree.

Answer: The drugs used in different stages of peach trees are also different, and the new high-lipid membrane is mainly used for sterilization and disease prevention before the peach tree germinates. Before the peach tree blooms, it is necessary to spray oxidized fruit to prevent aphids, and spray multi-effect frustration to promote the flower bud differentiation of peach trees. After the peach tree has flowered, dichlorvos can be used to remove the larvae of the red-necked longhorn beetle.

First, before germination, before the peach tree germinates, some fungicides should be sprayed, and a new high-fat film can be sprayed to achieve asphyxiating sterilization, prevent disease infection, avoid ulcers, ulcers and other cortical diseases.

Second, spraying before flowering before the peach tree blooms, after finding the disease, it is necessary to spray the drug in time for prevention and control, and find that the flow gum needs to be scraped in time, and at the same time, it is necessary to do a good job in the prevention of aphids, and choose 40% oxidized fruit for spraying. Before the plant blooms, it can also be sprayed with a multi-effect frustration solution to promote the differentiation of the flower buds of the plant and promote the fruiting of the peach tree.

Third, spraying after the flowering of the peach tree, it is necessary to remove the larvae of the red-necked longhorn beetle, you can use a cotton ball soaked in dichlorvos solution to plug the insect holes, or you can use a new high-fat film mixed with fungicide to spray, which plays a role in sterilization and disinfection and improves the resistance of fruit trees.

Fourth, after the peach tree spraying time enters March and April, the temperature slowly rises, and various germs and pests begin to move, so it is necessary to do a good job in the prevention of pests and diseases. In addition, peach trees cannot be sprayed with pesticides during flowering, which can easily affect the normal flowering of the plant.

At this time, it is necessary to choose different pesticides according to different situations, and then you can also choose a variety of pesticides to mix, and then you can also use farm fertilizer, phosphate fertilizer, potassium fertilizer, and organic fertilizer.

If you want to have a better insecticidal effect on peach trees, you can add an organic fluorine anti-anti-synergist when you apply pesticides to peach trees, which can effectively improve the effect of pesticides, eliminate insect pest resistance, and have a better control effect!

1. Imidacloprid.

Imidacloprid has a strong multiple drug effects such as contact killing, systemic absorption, and stomach toxicity to kill aphids, and also has a certain insecticidal effect on leaf curling moths. In general use, 10% imidacloprid wettable powder 3000 times solution is selected, which can be used in the autumn and winter insect egg hatching period and adult stage, and is used once every 7-10 or so, and 2-3 times in a row.

2. Scallop full of spirits.

Cocole, also known as engine oil emulsion, can be used as a contact killer to control mulberry white scale nymphs and aphid eggs, overwintering mites, etc. The use time is generally after the peach buds germinate in spring, and the concentration of 95% cocoon is 100-150 times the solution.

3. Tachycarmonone.

Tachycarone has a good insecticidal effect on red spiders, aphids, and thrips, and the use of 20% tachycarone wettable powder 3000 times liquid spray at the location where the insect infestation occurs, the general effect can last for about 30 days.

What are the pests of extended peach trees.

1. Aphids. Aphids are more harmful to peach trees and are a very common pest of peach trees. The cause of insect infestation is generally that the temperature and humidity change drastically in spring, which is easy to cause aphids to multiply, and the aphid infestation is generally most serious in May.

2. Mulberry white scale.

The female adults and nymphs of the white scale eat the new shoots and fruits of the peach tree, causing a significant decrease in yield.

3. Red spider.

Spider mites mainly damage the leaves of peach trees, causing defoliation and loss of peach fruit quality.

Peach tree pests and diseases: prevent aphid resistance, rotate pesticides to prevent aphids!

The prevention and control of peach tree perforation disease and preventive measures are as follows: 1. Pay attention to drainage in peach orchards, increase the application of organic fertilizer, avoid partial application of nitrogen fertilizer, and prune reasonably to ventilate and transmit light to the peach orchard, so as to enhance the tree potential and improve the disease resistance of the tree.

2. After germination, spray 500 700 times of 20% thiazole copper suspension and spray evenly, or spray 600 1000 times of 40% thiazole zinc suspension, or spray 600 800 times of 20% thiazole wettable powder and 200 times of 4% chunleimycin wettable powder. Fruit farmers should pay attention to the choice of pesticides to use alternately, do not always use the same formula, so as not to develop resistance and reduce the control effect.

Pesticides commonly used on peach trees.

Bacillus thuringiensis: Bacillus thuringiensis is a microbial pesticide with stomach toxicity. With 8000IU mg of Bacillus thuringiensis suspension 200 times liquid, used in the evening or cloudy day on a sunny day, evenly spray the crop leaves, the application period is the peak hatching period of pest eggs to the young larval stage, which can effectively control peach tree inchworms and heart-eating insect pests.

The agent can not be mixed with fungicides, alkaline pesticides, organophosphorus insecticides, etc., and needs to be re-sprayed in case of rain within 6 hours after application.

After the peach tree bears fruit, it is susceptible to pests and diseases, and if you want to prevent diseases such as brown rot, anthracnose and scab, you can spray fungicides such as carbendazim or chlorothalonil to prevent it. If you want to prevent insect pests such as peach leaf miner, peach aphid, tea wing bug and peach borer, you can spray imidacloprid, avermectin and difenoconazole and other agents for prevention.

The fruiting period of peach trees is between August and September, and peach trees need to be sprayed to prevent pests during the fruiting period, which can improve the yield of fruits. The pests that need to be prevented in peach trees are peach leaf miner moth, peach aphid, tea-winged bug and peach borer and other insects, and during the fruiting period, peach trees can be sprayed with chemical agents such as imidacloprid, avermectin and difenoconazole for prevention.

During the fruiting period, peach trees can be infected with brown rot, anthracnose and scabs. Brown rot can make peach trees stiff, anthracnose can make the fruit soft and rotten, and scabs will make the fruit black and rotten. During the fruiting period, peach trees can be sprayed with fungicides such as carbendazim or chlorothalonil for prevention, which is conducive to the healthy growth of fruits.

Before spraying the peach tree with trapped Chinese medicine, you can dilute the medicine with water according to the instructions, and pay attention not to be too high. Spray the diluted agent on the branches and leaves of the peach tree, generally spray the peach tree once between 10 and 20 days, which can effectively prevent pests and diseases. If the peach tree has been diseased or infestation, it is necessary to cut off the diseased branches and insect leaves of the peach tree and burn them.

If there is a peach leaf miner moth on the peach tree, the peach tree can be sprayed with pyrethrin or pyrethrin for insect control, and if there are peach aphids on the branches and leaves, the peach tree can be sprayed with methamidophos or imidacloprid for insect control. If it is a tea-winged bug, it can be sprayed on the peach tree to kill the insects or Wanling, and if it is a peach borer, the peach trees can be sprayed with trichlorfon or quick killing to remove insects.

Main pest control techniques for peach trees

The main diseases of peach trees are: peach gum disease, peach rot disease, peach leaf shrinkage disease, peach scab disease, peach perforation disease, etc.; The main insect pests of peach trees are: aphids, leaf-curling moths, leaf mites, heart-eating insects, scale insects, peach-necked longhorns, peach borers, beetles, etc.

1. Dormancy period to before germination: in autumn and winter, remove dead branches and leaves, bury them deeply or burn them; Combined with winter pruning, prune the branches of diseased insects and dead fruits; Turn over the tree tray and scrape off the old rough warped bark, diseased tumors, disease spots, etc. Before winter, spray the branches of the tree with 100 times of 5% bacterial poison water agent, and then paint the trunk and the large branches white.

Before budding in spring, the whole tree is sprayed with a baume 5 degree stone sulfur mixture.

2. Germination to flowering period: when the flower buds are white, to control aphids and scale insects, you can choose to spray 10 imidacloprid wettable powder 2500 times and 25% chlorchloride wettable powder 1500 times; To control leaf mites, spray with 2500 times of 20% mite dead suspension; For disease control, 50% carbendazim wettable powder 600 times liquid can be used for tree spraying; Manually scrape the rot disease, and apply the scar with 843** agent 10 times liquid.

3. Fruit expansion period: 15 days after leaf development, for disease control, you can choose to spray with 800 times of 70% mancozeb wettable powder or 70 methyl tobuzin wettable powder with 600 times of stove leakage; To control aphids and leaf mites after flowering, spray with 300 times of matrine aqueous solution or 20% 2000 times of emulsifiable concentrate; To control heartworms and peach borers, spray with 20% fenvalerate emulsifiable concentrate 2000 times; To control leaf curling moths, spray with 1500 times of 25% chlorpyramide No. 3 suspension. Artificial excavation of red-necked longhorn larvae;

4. Fruit hard core stage: artificial booby trapping beetles; For pest control, you can choose to spray 3000 times of acetodigin emulsifiable concentrate or 2000 times of kung fu emulsifiable concentrate; For disease prevention and control, you can choose to spray with 10% Shigao water dispersible granules 2000 times or 40% Fuxing emulsifiable concentrate 8000 times. Spray once every 7-10 days, alternately, and spray 2 times in a row.

5. Fruit ripening period: the trunk is tied with a straw rope or straw handle to trap and kill insects; Artificial digging of red-necked longhorn larvae; For disease prevention and control, use 2% pesticide resistance 120 water agent 200 times liquid spray; For pest control, spray with 48% Lesben EC 2000 times liquid or 20% hypertonic chlorpyrifos EC 1000 times liquid liquid.

Gummosis. Symptoms of gum disease: Gum disease occurs mainly in peach branches, especially the trunk and main branches of trees, which are most likely to occur.

The initial disease swelled slightly, gradually overflowing translucent gelatin, and the condition worsened after the rain. After that, the colloid gradually turns jelly, and it is yellowish-brown after losing water; It turns dark brown when dried.

Control methods: 1) Strengthen the management of water, soil and fertilizer, improve the physical and chemical properties of soil, improve soil fertility, and improve the stress resistance of forest trees.

2) Control all kinds of pests and diseases in Taoyuan in a timely manner.

3) After scraping, the knife edge and damage are coated with 843 rehabilitation agent and other protective agents and waterproof coatings.

4) After the leaves are dropped, the trunk and branches are whitened to prevent sun exposure and frost damage, and kill insects. The whitening agent is soybean juice: salt:

Quicklime:water = 1:5:

25:70。First, boil the high-quality quicklime water, add the bean juice and salt, and mix into a paste.

5) Spray stone sulfur mixture at the early stage of bud expansion to eliminate overwintering bacteria.