Fruit trees that grow fruit are sprayed with pesticides and take several days to eat

The safety interval for general pesticides is 7-14 days.

What are the commonly used fruit tree pesticides for fruit trees? Here are a few of them.

1. Avermectin.

It is a suitable insecticide for fruit trees in the current pollution-free fruit production. It has a strong medicinal effect against pests and mites. It has a strong contact killing and stomach toxicity effect, and the drug effect is rapid and the prevention and treatment is thorough.

It can effectively control aphids, spider mites, heart-eating insects, pear psyllids, spiny moths, beetles and other leaf-eating pests.

2. Chlorpyramide.

It is a biomimetic pesticide, and this fruit tree insecticide is mainly stomach toxic, and has contact killing effect. It is resistant to rain erosion, has an effective period of up to 20 days, and is safe for natural enemies. It can control the larvae of lepidopteran leaf-eating pests that damage fruit trees.

3. Marine.

It is a broad-spectrum plant insecticide, with low toxicity to humans and animals, contact killing and stomach toxicity, and can effectively control lepidopteran larvae and spider mites.

4. Mites die.

It has special effects on and eggs, harmless to natural enemies, has the advantages of strong permeability and long efficacy, and is an ideal fruit tree insecticide to replace dicofol and other acaricides.

5. Green Willy.

It is a contact microcapsule, the active ingredient is avermectin, which can effectively control the adult worms of longhorn beetles and gildingworms. It has good systemic properties, is a protective and high-quality agent, can prevent and control a variety of diseases such as ring pattern disease, defoliation, white rot, etc., and is an ideal fungicide to replace carbendazim and methyl tobuzin.

6. Agricultural streptomycin.

It is a fruit tree fungicide for the prevention and control of bacterial diseases, which can be used to prevent and control bacterial perforation diseases of peaches and apricots.

On the tree: apples, pears, peaches, walnuts, sand fruits, kiwis, bananas, grapes (vines), pomegranates, plums, chestnuts, apricots, dates, persimmons, lemons, cocoa.

On the ground: watermelon, strawberry, cantaloupe, melon, melon.

That's all, I really can't think of it.

Coconut, pineapple, apple, pear, peach, walnut, sand fruit, kiwi, banana, grape (vine), pomegranate, plum, apricot, lemon.

Two consecutive insecticides on fruit trees have an effect on fruit trees.

Fruit trees must be in accordance with the insecticide packaging instructions for the dosage and strict operation, once excessive or improper use, <>

It is easy to produce drug damage.

Influential.

Insecticides have an expiration date, and if the insecticide is applied twice in a row, the expiration date overlaps, which may reduce the effectiveness of the drug, or directly affect the fruit tree. Hope.

1. Fruit trees can be sprayed in sunny and windless weather, and the appropriate time is 8-10 am or 4-6 pm.

2. It is not advisable to spray at noon, because the light at noon is strong and the temperature is high, the pests will hide in the backlight, and the amount of activity will be reduced, and the high temperature will also cause the effect to be decomposed.

2. Precautions for spraying fruit trees.

1. Especially for apple trees at the seedling stage.

When spraying, try to use less or no Bordeaux liquid.

pesticides, which are conducive to reducing the incidence of fruit rust.

2. Fruit trees are more prone to aphids and red spiders.

and other insect pests, the back of the leaf needs to be evenly sprayed when spraying.

Summary. If the selected insecticidal product clearly lists the fruit tree as a registered object, its main active ingredient is relatively safe for the fruit tree and within the standard dose, and the fruit tree is not in the critical growth period or the safety interval of the product can be satisfied, then the use of the product may be more appropriate. But on the contrary, if the product does not include fruit trees or there is a large hazard, the dosage exceeds the standard or the safety interval is not satisfied, then it is best not to use it on fruit trees to avoid losses.

If the selected insecticidal product clearly lists the fruit tree as a registered object, its main active ingredient is relatively safe for the fruit tree and within the standard dosage range, and the fruit tree is not in the critical growth period or the safety interval of the product can be satisfied, then the use of the product may be more appropriate. However, on the contrary, if the product does not include fruit trees or there is a great harm, the dosage exceeds the standard or the safety interval is less than the lack of skin foot, then it is best not to use it on fruit trees to avoid losses.

Whether insecticidal sprays can be sprayed on fruit trees requires consideration of several paralytic aspects:1Objects and scope of registration of insecticidal products.

Many insecticide products are registered with a specified range of crops that can be applied, and if it is stated that fruit trees are not included, then it is generally not recommended to use them on fruit trees as this may cause some damage to the tree and fruit. 2.The active ingredient of insecticidal products and their effects on fruit trees.

If the main active ingredient of the product is a permissible and appropriate insecticide for fruit trees, it may be safe to use in standard doses. However, certain ingredients may increase the risk of more serious fruit tree disorders, depending on the specific product formulation.

3.The period between the development of the fruit tree and the safe interval between the brother of the product. Insecticide products usually cover different growth stages of different crops and give recommended safety intervals depending on the actual application.

If the fruit tree to be sprayed is in the critical growth period and the safety interval of the product cannot be met, then the use of the blind pants insecticide may cause some harm to the fruit tree and fruit, so it needs to be carefully considered. 4.The dosage and concentration of the pesticide used.

As long as the dosage and concentration are controlled within the recommended or allowable range of the product, it is generally safe. If the standard dose is exceeded, it is likely to pose a serious threat to the fruit tree, which needs to be strictly avoided.

Before use, it is recommended that you carefully read the instructions of the insecticidal products, and judge carefully according to the specific conditions of the fruit tree. If you still have doubts, you can refer to the correction to consult an agricultural technician. Hopefully, this information will be helpful to you.

If you have any other questions, please feel free to contact us and we will be happy to provide you with detailed answers. <>

Summary. Dear, I'm honored to have your question The information that the teacher found for you here is: Does it have an effect on fruit trees to be sprayed with pesticides twice in a row?

Fruit trees have the impact of two insecticides in a row: pesticides mainly include insecticides, fungicides, herbicides and plant growth regulators, in production practice, most of the pesticides are not allowed to be sprayed repeatedly, if repeated spraying, will cause pesticide damage because of the increase in the amount of pesticides, so that the crop yield is greatly reduced, and some pesticides repeated spraying may cause the serious consequences of death, or even no harvest, so the pesticide residue can not be re-sprayed. Insecticides cannot be sprayed continuously to have an effect on the plant.

Dear, I'm honored to have your question The information that the teacher found for you here is: Does it have an effect on fruit trees to be sprayed with pesticides twice in a row? Fruit trees have been affected by two consecutive insecticides for:

Pesticides mainly include insecticides, fungicides, herbicides and plant growth regulators, in production practice, most pesticides are not allowed to be sprayed repeatedly, if repeated spraying, will cause pesticide damage because of the amount of drug increase section contains a large amount, so that crop yield is greatly reduced, some pesticides repeated spraying may cause death, hold the smile roll away and even the serious consequences of no harvest, so the pesticide residue can not be re-sprayed. Insecticides cannot be sprayed continuously to have an effect on the plant.

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1. Temperature: pests and diseases are more active in 20-30 hours, high temperature in summer, spraying before 10 o'clock in the morning or after 4 o'clock in the afternoon; When the temperature is low in spring and autumn, the medicine is sprayed at noon.

2. Fruit tree growth: before the fruit tree blooms, the fruit preservation drug is used to improve the fruit setting rate and increase the yield of the fruit tree; One week after flowering, it is necessary to inject pesticides to prevent pests and diseases to reduce the possibility of pests and diseases; During the period when the fruit is enlarged, you can spray it once, which can make the fruit pedicle thicker and increase the amount of nutrient transport.

Characteristics of pests and diseases: such as the control of whiteflies (fly away as soon as they are touched), spray pesticides in the morning when the dew is not dry; To control flower thrips, spray in the morning when the flowers bloom; Control of leaf thrips, spraying in the evening or at night, etc. Diseases are usually spread by rain, and when preventing and controlling, pesticides can be applied before and after rain, before watering, before cloudy days, and at the beginning of the disease.

Before it blooms, it is necessary to inject fruit preservation medicine, which can increase the probability of fruit setting and increase the yield of fruit trees, and the type of medicine can be used as a growth regulator. Within 7-10 days after the flowers have withered, it is necessary to apply a pesticide to prevent pests and diseases. During the period of fruit expansion, you can spray a strong fruit to prevent the fruit from falling, or it may cause deformed fruit.

Before the fruit tree blooms, it is necessary to take fruit preservation medicine, which can increase the probability of fruit setting, increase the yield of the fruit tree, and reduce the probability of fruit drop. 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. In addition to the use of growth regulators, it is necessary to supplement trace elements, the most important of which is boron, which can effectively promote the germination of pollen, help to complete fertilization, and can also be mixed with sugar in the 7-10 days after the flowers wither, it is necessary to inject a pesticide to prevent pests and diseases, 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, which can be more selective, such as stone sulfur mixture, which has a good effect and is not high in cost.

After eating a fruit that has been sprayed with pesticides, the seizure is traceable, basically fine, but the amount is too large or excessive, and the seizure occurs immediately. This kind of problem must be paid attention to, when choosing fruits, we must pay attention to the relevant hygiene and health, different fruit pesticide stay degree is not the same.

1. The top three pesticide residues are: cucumber, containing 4-13 different pesticide residues; strawberries, containing 1-13 species; rape, containing 1-12 species; This is followed by cowpeas, sugar oranges, snow peas, lentils, mustard greens, baby tomatoes and spinach. Although the Ministry of Health responded to this, pointing out that the pesticide residues in these vegetables and fruits did not exceed the national standards, they still left some doubts and shadows in the hearts of the people.

2. More than 90% of the vegetables and fruits on the market meet the national pesticide residue standards.

3. In the cultivation of vegetables and fruits, it is true that for various reasons, some use slightly more pesticides, and some use slightly less. Carrots, potatoes, cabbage, Chinese cabbage, lettuce, and coriander are less pesticides; Cowpeas, onions, leeks, cucumbers, tomatoes, rape, and eggplants use more pesticides. Generally speaking, leafy vegetables have more pesticide residues than root vegetables because their leaves are soft and watery, and insects love to eat them; Rhizomes are buried in the ground and are not easy to attract insects.

Cherries, early peaches, and apricots are all fruits that are less pesticides. However, due to the origin, variety and other reasons, the amount of pesticide residues in each vegetable and fruit is very different, and it cannot be generalized.

Pesticide residues do not show symptoms very quickly unless the amount of pesticide residues is very high. The harm of many residues to the human body is very slow, such as self-cancer, blood diseases, liver diseases, cardiovascular and cerebrovascular diseases; Deformity, mental retardation, dementia, underdevelopment and other manifestations of offspring are caused by the accumulation of pesticide residues.

It is best to spray fruit trees with insecticides at night.

Insecticides are a class of chemical agents that can repel sanitary pests, thereby preventing insect-borne diseases and protecting human health. When pesticides are used at night, the temperature and humidity can be lower, and various pests are also in a resting period, which will cause the pesticides to adhere for a longer period of time and can exert the best effect.

However, the timing of application of insecticides for fruit trees is not set in stone and should be considered in a variety of different contexts. Fruit farmers need to reasonably choose the best pesticide application time according to the comprehensive judgment of fruit tree varieties, climate, pest hazards, etc., in order to achieve the best control effect. At the same time, follow the pesticide publicity and use instructions, abide by the limit of pesticide application amount, ensure the market safety and personal safety of fruits, so as to contribute to the sustainable development of agriculture.

Introduction to insecticides

Insecticides are characterized by wide application and quick effect. Methods such as sprinkling eggplant cloth, spraying, fumigation, and attracting are often used to make the insecticide penetrate into the insect body to play a contact killing effect, enter the digestive tract of the insect body to play a stomach toxicity effect, and invasibly absorb and cultivate the insect body through the body surface stomata to play a fumigation effect; Or the insecticide is first absorbed by the domestic animal or plant, and when the insect bites the blood of the domestic animal or the juice of the plant's stems and leaves, the drug enters the insect body. Poisoning insects to death through these modes of action.

Pesticides should be safe for humans and animals, and less toxic. The insecticidal effectiveness is manifested in the ability to poison insects and the speed of knockdown. For different pests, precise application is required.

For example, for a variety of fruit tree herb-loving pests, we can determine the application time according to the time when the pest is cracked.

The above content refers to Encyclopedia - Insecticides.