What are the latest pesticides used in fruit trees in each season and how to use them

The plant-derived suspension fertilizer for the treatment of crop viruses can be hit with a few leaves, and it is mainly a series of products for the prevention and treatment of viral diseases.

Due to the different types of flowers, the difference in growth and development stages, often make some common flowers in the use of pesticides when the drug damage, the light of the appearance of fallen leaves, flowers, fruit drop, heavy cause plant death, resulting in great losses. Therefore, for ornamental plants that are sensitive to pesticides, it is particularly important to choose pesticides correctly. The following is an introduction to the pesticide damage caused by common pesticides.

Dimethoate, dimethoate: kiwifruit is particularly sensitive and should not be used; It can produce obvious pesticide damage to ornamental plants of the family such as plum blossom, cherry blossom, peach, elm leaf plum, begonia, apricot, pear, etc.; Dimethoate is also very harmful to shrimp and coral flowers of the family of the family of Jue Bed, if it is sprayed in June and October, it often causes the petals to wither and roll, and the leaves, inflorescences and small schools fall off, and lose their ornamental value; In addition, dimethoate also has a certain effect on melons. Therefore, the above-mentioned ornamental plants should not use dimethoate and oxidized dimethoate.

Dichlorvos: Dichlorvos has obvious pesticide damage to ornamental plants such as plum blossoms, cherry blossoms, peaches, apricots, elm plums, twentieth century pears, and Jingbai pears, and other kinds of pesticides should usually be used instead. Dichlorvos also has different degrees of pesticide damage to rhododendron, mantou willow, kiwifruit, acacia, walnut and melon, etc., and should be very cautious when using pesticides to prevent and control insect pests of these plants, so as not to cause unnecessary losses.

Trichlorfon: It has a pesticide effect on cherry blossoms and plum blossoms.

Stone sulfur mixture: stone sulfur mixture is harmful to peach, plum, plum, pear and other plants of the Rose family, if the stone sulfur mixture is used on these plants, it is best to spray it in the deciduous season, do not use it in the growing season or flower and fruit period; Stone sulfur mixture has a certain pesticide damage to kiwifruit, grapes, cucumbers and leguminous flowers.

Pine borer: The use of pine borer in the high temperature season to kill insects has serious pesticide damage to pomegranates, and has certain damage to cruciferous flowers.

Bordeaux liquid: sensitive to peaches and plums during the growing season; When the amount is lower than the amount, pears, apricots and persimmons are prone to pesticide damage, and when the amount is higher than the amount, grapes are prone to pesticide damage.

Pine resin counter: The use of pine resin mixture in summer has obvious pesticide damage to persimmons, and has adverse effects on citrus in spring and summer.

In order to prevent pesticides from causing pesticide damage to many ornamental plants, one is to purposefully switch to other high-efficiency and non-harmful pesticides; the second is to reduce the concentration as much as possible; the third is not to spray under high temperature and high humidity conditions; In this way, losses can be avoided, and attention should be paid to the rational use of pesticides.

Fungicides are commonly used. Planting fruit trees, especially in the rainy season or when they are about to bear fruit, will inevitably have some bacterial diseases, once bacterial diseases are found, then it is necessary to spray pesticides for control. There are many fungicides on the market, such as this barium polysulfide, which can have a good bactericidal effect.

Of course, some people will also choose to use Bordeaux liquid.

This drug is a broad-spectrum fungicide, which can have a good effect on a variety of bacterial diseases. <>

Insecticides will definitely be used next, and there are many types of insecticides, and you can choose this avermectin insecticide drug. When the fruit in the orchard is about to ripen, there will inevitably be some insects, so we should spray some pesticides to kill insects or even prevent them. Generally speaking, spraying some pesticides in advance for insect control is the best, when the insect pest occurs to spray, it may have a certain impact on the fruit, and some may cause the fruit to be unsightly, affecting the pulse, so it will directly affect our economic benefits, so it is best to choose to prevent in advance in the high season.

CypermethrinIt is also a commonly used insecticide in orchards. Some insects in the orchard will ovulate, and ovulation from the inside will generally choose on the roots or leaves, if some drugs are not used to effectively kill, then it is likely to lead to frequent harm, and even insect flooding. In addition, pesticides are used for too long and frequently, and insects will become resistant to this drug.

Therefore, when using pesticides, different varieties should be replaced. <>

ImidaclopridIt is a strong insecticide, with strong systemic absorption on the leaves, and the effect is particularly long, and it can have a good killing effect for some insects that bite the leaves. Like caterpillars, for example.

Ah, or rather, like this scale worm.

Ah, it can have a good killing effect, because this time the insect will gnaw some leaves, and it just so happens that this pesticide is strong and will remain on the leaves.

The more common pesticides in the orchard are stone sulfur mixture, avermectin, imidacloprid, acetamiprid, chlorpyramidale, fipronitr, spiromethyl, and kung fu methrin.

Fungicides, herbicides, growth regulators, insecticides, fiprofenon, these are very common and have a wide range of applications.

For example, there are insecticides, herbicides, and then acaricides, rodenticides, and fungicides, and these five pesticides are commonly used in orchards.

In recent years, the wrong use of pesticides on fruit trees has not only caused some pollution to the orchard environment, but also brought many troubles to fruit farmers. So what are the effects of pesticides on fruit trees?

Immediate impact

The direct effect of pesticides on fruit trees comes from the fact that after the use of pesticides, part of them penetrate into the tissues and are transported in the plants, causing different degrees of pesticide damage. Minor pesticide hazards can affect the normal growth of fruit trees, resulting in yield loss and severe fruit tree death. Pesticide poisoning can affect the normal physiological function of a person and even endanger life.

Acute pesticide damage can cause spots, yellowing, loss of green, wilting, leaf rolling, leaf fall, fruit drop, etc., which generally occur quickly and the symptoms are obvious.

Chronic critical effects of pesticides can impair photosynthesis.

Delay the formation of flower buds, delay the ripening of fruits, deteriorate taste and color, and even lead to the death of fruit trees. Symptoms appear only for dozens of days after application, and the symptoms are not obvious.

Indirect impacts

The indirect effects are mainly pesticides entering the orchard soil through a variety of ways, killing soil microorganisms, affecting soil maturity and permeability, destroying soil structure and soil fertility, causing soil compaction, affecting the growth and development of fruit trees, and reducing fruit quality. Although the biggest ecological effect of pesticides is their impact on natural enemies, they also cause damage unknowingly.

So how to use pesticides correctly?

First of all, there are a few things to masterPesticide common sense。The physicochemical properties of these pesticides are most closely related to fruit trees. Generally speaking, small molecule water-soluble inorganic agents are the most likely to cause drug harm, so drugs with weak water solubility are safer.

WP is the next best option, while milk powder and granules are relatively safe.

In the process of spraying pesticides, it is necessary to pay attention:Alternate use of different agentsBecause due to the influence of various reasons in the production process, fruit farmers will habitually increase the use of pesticides, and unreasonable increase in the amount will cause unnecessary damage to fruit trees.

Spraying pesticides should be followedStandard operating mode, including the selection of a sprayer with a high degree of atomization, carefully spraying on the surface of the blade and the back of the blade, and not repeating the spraying. Only by doing it correctly can we ensure the effectiveness of spraying pesticides.

In order to make the environment of the orchard better and the profits of the fruit growers better, the correct use of pesticides is indispensable.

It has a particularly important impact, which can improve the normal growth of fruit trees, increase the yield of fruits, prevent pests and diseases, achieve the effect of insecticide, and ensure the quality of agricultural products; Don't use pesticides when it's windy, rainy, or snowy.

The impact on fruit trees is very large, after all, pesticides will have a certain amount of destructiveness, and will also limit the growth of fruit trees, we must pay attention to dilution when using pesticides, and then should be modulated in accordance with the relevant proportions, so as to reduce the damage.

It is true that pesticides must be used to prevent pests and diseases during the growth of fruit trees, and pesticides are added to dilute the sprayed roots with water.

1. Before the fruit tree blooms, it is necessary to take fruit preservation medicine, which can improve the probability of fruit setting, increase the yield of fruit trees, and reduce the probability of fruit dropping. The type of agent can be a growth regulator, which can regulate the growth of the fruit, the main ones are gibberellin, naphthalene acetic acid, etc., and the concentration does not need to be too high.

2. In the 7-10 days after the flowers wither, it is necessary to inject a pesticide to prevent pests and diseases to reduce the possibility of pests and diseases and remove hidden dangers. The specific type of medicine needs to be based on the type of fruit tree, and there are many options, such as stone sulfur mixture.

3. In the period of fruit expansion, you can spray a strong fruit stem, which can make the fruit pedicle thicker, and can also increase the amount of nutrient transport, which can prevent the fruit from falling or cause the possibility of deformed fruit in the later stage.

I haven't been dark last year, so please tell me what medicine to take. It won't drop fruit,

Not every period must be sprayed, different types of fruit trees, the occurrence of pests and diseases in each period is not the same, even if it is the same kind of fruit tree, in different areas or different orchards in the same area, the occurrence of pests and diseases is not exactly the same, should be based on the specific occurrence of fruit tree pests and diseases, timely use of medicine to prevent and control.

There are insects to treat insects, there are diseases to treat diseases, and in late autumn, combined with pruning and garden medicine.

On fruit trees, spraying is the most commonly used method of application, requiring small droplet diameter and high density so that the liquid is more suitable. Good coverage, most sprayers are to press the medicine to the nozzle hole with a certain pressure to be conical, such as the nozzle hole can be sprayed out of a large caliber, long range, but the droplet is large and the density is small, not easy to spray, and the control effect is poor. Because a large number of diseases and insects on the back of the leaves are very harmful, and the current use of pesticides is mainly contact killing and stomach poison, there are few systemic agents, and there are few pathogens, and the harmful organisms must be in contact with the pesticides to be killed, so when spraying, it should be sprayed in the crown and on the back of the leaves, and then the ceiling to avoid missing spraying or respraying.

Move the nozzle frequently, do not flow the liquid downward, and take the spray as the target for wetting. <>

When dispensing, a small amount of water should be put in the sprayer to add the required amount of medicine, and then add enough water to stir fully before spraying; WP should be mixed into a paste with a small amount of water, poured into a spray container, add the required amount of water, and then spray do not pour the powder directly into the water or container. The distribution water should be clean water from rivers or ponds, mineral-free, high-fertilizer water containing a lot of spring water or humus. The water temperature should not be higher than the ambient temperature when preparing the liquid, and the <> should not be used

Know when to take your medication. If the disease is spread by rain, it is effective to take medicine before, after rain, before watering, and before cloudy days. If the pest flies after colliding with the whitefly, the pest must be applied before the dew dries.

Dilution should be moderate. Pesticides must be bought back for dilution use. The reduction concentration should be increased as indicated.

The concentration of the pesticide cannot be changed arbitrarily. Under normal circumstances, when the insect infestation is serious, the concentration can be adjusted appropriately, but it cannot be doubled. Stir reasonably.

Pesticides have certain properties. This should be paid attention to mixing, otherwise the efficacy of the drug is easy to decrease, and even cause drug damage. Copper agent should not be mixed with alkaline pesticides, and acidic preparations should not be mixed with alkaline agents to avoid pesticide damage.

The main pesticides for the prevention and control of fruit tree diseases are: Bordeaux liquid, zebze, tobuzin, carbendazim, antibacterial special, ethylphosphine aluminum, promethine, powdery rust, etc., this kind of pesticide is called fungicide, the main role is to inhibit or kill all kinds of germs; The main pesticides for the control of fruit tree seedling pests are: pine borer, phosphine, dimethoate, dicofol, mite, amidophos, deltamethrin, and butyl.

This kind of pesticide is called insecticide, and its main role is to kill pests through different poisoning methods such as stomach poisoning, contact killing, internal absorption, and fumigation. There are also concomitant pesticides, such as stone sulfur mixture, which can prevent diseases and treat insects.

The following pesticides should not be mixed: Bordeaux liquid and stone sulfur mixture should not be mixed. Because these two pesticides will undergo chemical changes after mixing, copper polysulfide will be generated, which will not only reduce the efficacy, but also cause pesticide damage.

When these two pesticides are used sequentially, they should also be used at intervals. Stone sulfur mixture is used first, and Bordeaux liquid can be sprayed after an interval of 20 to 25 days; Spray the concentrated liquid first, and it needs to be separated by 25 to 30 days before using the stone sulfur mixture. Bordeaux liquid and stone sulfur mixture and most insecticides, such as phosphine, phosphosphos, dichlorvos, dicofol, carbaryl, carbaryl, etc., can not be mixed, and the mixed use will lead to the decomposition of the agent and invalid.

Microbial insecticides, such as Beauveria bassiana and green worms, should not be mixed with microbial fungicides, such as well-gangmycin and chunleimycin, otherwise the microorganisms will be killed and reduce the efficacy. Oil emulsions, soaps and most insecticides and fungicides should not be mixed, and the mixed use will cause the decomposition or precipitation of the agent and reduce the efficacy. Organophosphorus pesticides are mixed with deltamethrin, which can increase the insecticidal effect, but also increase the toxicity to humans.

The principle of pesticide selection for fruit trees is not to harm the growth of fruits, as well as the growth of fruits and vegetables, in fact, they must be used in accordance with these principles, otherwise it is difficult to have a large fruit yield.