What pesticides are used to control fruit tree diseases and pests?

1. Remove the dead branches and fallen leaves, and cut off the diseased and insect branches.

Many of the pathogens and pests that harm fruit trees overwinter in dead branches and leaves and wild grasses, and then breed on the trees the following year. For example, the overwintering sites of germs such as apple brown spot, gray spot and pear scab are among the stumps and weeds.

Most of the pathogens of apple anthracnose, grape white rot and peach brown rot overwinter on the residual fruits, and the larvae of pear tumor moth and apple apical leaf curl moth mostly overwinter on branches.

Therefore, it is necessary to remove the fruit trees and their nearby dead branches, fallen leaves and other garbage and debris, concentrate or burn, and combine winter pruning to effectively eliminate these overwintering pests and diseases, and take the cut diseased and insect branches to the orchard to be made or burned, so as to eliminate pests and diseases from the source.

2. Scrape the bark and white.

After leaf drop, apples, pear rots, ringworms, pear heartworms, apple moths, and hawthorn spider larvae and adults mostly overwinter in the rough bark and cracks of the trunk.

Scraping off rough skin, warped skin, and diseased skin can receive good results in the prevention and control of pests and diseases.

The best time to scrape the skin is in late autumn and early winter, and the depth of scraping is to scrape the rough skin and diseased skin, exposing the light brown cortex, and then apply lime fluid on the trunk.

When scraping, a plastic sheet is laid under the tree to collect the scraped bark so that it can be taken out of the orchard for making or burning.

3. Deep ploughing of tree trays and winter irrigation.

The tree disc refers to the soil that is centered on the trunk of the tree and enclosed by the canopy.

By deep ploughing the orchard soil in autumn and winter, bacteria and pests hiding in the soil for overwintering can be turned out of the ground, allowing birds to peck at and freeze to death. At the same time, it can also bury the dead leaves and dead grass pests on the ground, and these pests are not easy to get out of the soil and suffocate the following year. The ploughing depth should be about 30 cm.

Winter irrigation in the orchard can cause the soil temperature and oxygen content to drop sharply, which is very beneficial for killing root eggs and reducing the degree of pupal emergence.

Precautions when scraping the skin.

First of all, the tools should be disinfected, and every time the bark with disease spots is scraped, the tools should be disinfected with alcohol before use, so as to avoid the spread of germs caused by humans.

Secondly, the bark should be scraped properly, the bark of large trees should be scraped white, and the small trees should be green, and should not be scraped to the xylem.

After scraping, the trunk is painted white, which on the one hand kills the insects and diseases that overwinter in the cracks of the bark, and on the other hand, prevents the plants from frost damage.

Apply the main stem and the lower part of the main branch to be even, and whiten it twice for better results, once in late autumn to early winter, and the other in late winter to early spring of the second year.

When coating the trunk, it is appropriate not to run, not to warp or fall off after drying. In this way, it is conducive to the prevention and control of sunburn, and also to treat trunk diseases and pests. Whitening should be done on sunny days, and whitening in rainy and snowy weather will reduce the effect.

Hello, the main thing is to see what kind of fruit trees, what pests and diseases, targeted pesticide application is effective.

Fruit tree aphids can be used pesticides such as imidacloprid, pyrethroid, thiamethoxam, dichlorvos, acetamiprid, pymetrozine, fast kill, etc. Aphids are very common insect pests, it not only has the ability to fly, but also has a strong ability to reproduce, which will seriously harm the branches and leaves of fruit trees. In winter, the orchard should be cleaned of weeds and dead leaves to reduce the incidence of pests in the coming year.

Fruit tree aphids can be controlled with pesticides such as imidacloprid, pymetrozine, acetamiprid, thiamethoxam, and ethyl spinosad.

Peach aphid, in the early stage of peach tree germination, use 5% anthracene oil emulsion, spray fruit trees; In May, I sprayed 2000 times of 48% Lesben EC.

Pear aphid, when the pear tree has just rolled its leaves in spring, spray it with 3000 times of 20% pyrethrin emulsifiable concentrate to ensure uniformity.

For apple aphid, in mid-May, use 3% of 2000 3000 times of emulsifiable concentrate or 35% of 2500 times of aphid king.

Apples, pears and other crops flower dew red period of the use of medicine is mainly to prevent and control powdery mildew, flower rot, mildew, black and red spot disease and other diseases and gold tortoise shells, red spiders and other pests, this medicine can be good to eliminate all kinds of pests and diseases in the bud, for the whole year to lay a good foundation for pest control.

Urine lotion to kill red spiders, aphids generally use 300-500 grams of urea plus 100 grams of washing powder per mu, mix with 50 kg of water, mix and stir well, make urine lotion mixture for spraying, can effectively control red spiders, aphids and other pests on fruit trees, and can play a certain top dressing effect.

Under general conditions, there are four methods for controlling fruit tree diseases and pests, namely manual control, biological control, physical control and chemical control methods, and their specific contents are:

Artificial control refers to the combination of cultivation management, through fertilization, soil turning, pruning, thinning flowers and fruits to eliminate pests and diseases, or according to the characteristics of pests and diseases to eliminate pests and diseases by manual killing, removal, scraping. This method is used a lot in production, and almost every pest and disease control is used. For example, in winter, clean up the fallen leaves and fruits, scrape the rough bark, cut the diseased branches, and kill the longhorn beetle, tea-winged bugs, beetles, and scaphoid caterpillars in the growing season.

Biological control refers to the biological control of pests and diseases using living natural enemies. At present, China is mainly used for the prevention and control of pests, and the natural enemies that can be artificially propagated and released in large quantities are Bacillus thuringiensis, microsporidia, entomopathogenic nematodes, insect viruses, Beauveria bassiana, red-eyed wasps, ladybugs, lacewings, predatory mites, etc. Physical control uses various physical factors (light, electricity, heat, wind) or equipment to control pests, including trapping, trapping, blocking, and the use of irradiation technology.

For example, black light attracts insects, fruit trees are painted white to repel pests from laying eggs, and sweet and sour liquid and sexual attractants are placed in moth trap vessels. Chemical control is a method of using various chemical substances to control pests and diseases. At present, it mainly refers to the prevention and control of chemical pesticides.

There is no one-size-fits-all clever way, only prevention is the mainstay, timely prevention and control, such as removing deciduous weeds and dead branches in the orchard in winter, spraying 5 Baumé stone sulfur mixture before germination, spraying Bordeaux liquid before the rainy season, and paying attention to observation during the high incidence period of the high temperature season in the rainy season, so as to prevent the damage.

1. If the rainfall is heavy in early autumn, some unbagged orchards are prone to rot disease, and after the onset of the disease, 600 times of the liquid 50% carbendazim plus 600 times of the liquid Plague Frost plus 1000 times of the liquid to help kill, spray once every 7 10 days.

2. In early autumn, pear orchards are prone to scab, prevention and control methods: spray 2000 times of Teprazole or 25% difenoconazole 8000 times every 7 10 days. Orchards that have not yet developed the disease should be sprayed with absorbent fungicides immediately after rain, such as 50% carbendazim 600 times liquid, 80% epidemic frost 600 times liquid, 70% methyl tobuzine 800 times liquid, Fuxing, etc.

3. Peach fruit is prone to scab and gum disease, and should be prevented by using cythycozone 800 times solution or 50% dysen zinc 500 times solution. 7 to 10 days before picking, spray phenoxycarb perchlorine to control pear heartworm and peach borer. After fruit picking, the leaves should be protected, and the perforation disease should be prevented with zinc ash solution, and the stinging moth and leaf roller moth should be sprayed with 1500 times of cypermethrin and 2000 times of Lesben for control.

Fruit tree pest control needs to vary from fruit to fruit, and different fruit tree varieties and different pest types need to be treated at different times. In general, the following points can be used as a reference:

Regular inspections: Regular inspections are required during the growth and development of fruit trees to find pest problems in a timely manner. For the pest problems that have been discovered, corresponding control measures should be developed as soon as possible.

Weather conditions: Weather bars are also an important factor in preventing pests and pests in fruit trees. Generally speaking, in Hyochong, the number of insect infestations may increase during the dry, warm season. At this time, you should pay attention to insect pest control and try to avoid spraying pesticides under conditions such as high temperatures, strong winds or rain.

Control cycle: Fruit tree pest control needs to follow the control cycle, and choose the appropriate control method according to the life cycle of the pest. For example, insect borer pests need to be sprayed during the hatching period of their eggs; Citrus pests need to be sprayed before flowering to avoid affecting fruit formation, etc.

Occurrence of pests and diseases: Fruit tree pest control also needs to be selected according to the occurrence of local pests and diseases. For example, there may be more serious aphids or borers in some areas, and corresponding prevention and control measures need to be taken before they appear.

Note: Fruit tree pest control needs to be combined with the actual local situation and the characteristics of fruit tree varieties, and it is necessary to pay attention to the safe use of pesticides to avoid harm to the environment and human body.

Summary. Thioophanate-methyl, also known as methyl tobuzin, is a broad-spectrum systemic low-toxicity fungicide, which has a preventive and first-class effect, which can be quickly absorbed through the leaves and roots of plants and conducted in the body and evenly distributed, hindering the formation of pathogenic fungal biofilms and leading to the death of pathogens. It is used in cereals and fruit tree crops very much, and is used for fruit tree spot defoliation, various rusts, brown spots, anthracnose, gray mold, root rot, etc. and wheat mildew.

What medicine to use when planting fruit trees to prevent pests and diseases?

Thioophanate-methyl, also known as methyl tobuzin, is a broad-spectrum systemic low-toxicity fungicide, which has a preventive and first-class effect, which can be quickly absorbed through the leaves and roots of plants and conducted in the body and evenly distributed, hindering the formation of pathogenic fungal biofilms and leading to the death of pathogens. It is used in cereals and fruit tree crops very much, and is used for fruit tree spot defoliation, various rusts, brown spots, anthracnose, gray mold, root rot, etc. and wheat mildew.

Difenoconazole is a broad-spectrum systemic fungicide, which can be quickly absorbed by plants after application and has a long-lasting effect. It has a control effect on a variety of pathogenic fungi such as ascomycetes, basidiomycetes, semi-known fungi, etc., and is widely used in fruit trees, vegetables and other crops, mainly used as a foliar treatment agent and seed treatment agent thiamethoxam as the second generation of nicotinoid insecticides, with stomach toxicity, contact killing and systemic activity, can be used for foliar spray or soil root irrigation treatment, and is quickly absorbed after application, and conducts to all parts of the plant, and has a good control effect on sucking pests such as aphids, planthoppers, leafhoppers, whiteflies, etc. It can be used to control aphids, whiteflies, thrips, scale insects, etc. on fruit trees.