What are the guidelines for the selection of citrus acaricides?

We must pay attention to the rational use of drugs, we must choose the right type according to the situation of the crop, we should pay attention to the appropriate use time, do not pay attention to the appropriate dosage on windy days or rainy days, and do not use them with other pesticides.

You should choose some acaricides with better effects, and you should also prescribe the right medicine, choose some cost-effective, and at the same time, you should also let some professionals recommend them, and you also need to look at the ingredients of the acaricides, and choose acaricides that are not harmful to the environment.

The more common acaricides are avermectin, pyridafen, alkyne mite, foreign products such as spirodilate, for vegetables and fruit trees, spirofen, mainly for field crops, and Bayer's patent compound spiromethane ethylester, mainly for all stinging and sucking mouthparts pests.

There are Japanese friends, gold mite branches, mite ke, etc.

There are 5 types of precautions: 1The duration of the effect of alkyne mite is extended with the increase of the dose per unit area. 2.

In hot and humid weather, spraying young crops with high Xianghui concentration of alkyne mites (gmite) may have slight pesticide damage, making the leaves bent or spotted, but there is no effect on the growth of crops. For citrus, sweet oranges and apples under 25 cm, the concentration should not be less than 2000 times. 3.

This product can not be mixed with Bordeaux liquid and strong alkali pesticides, but can be mixed with general pesticides. 4.Alkyne mites are especially contact pesticides, which have no tissue penetrating effect, so they need to be evenly sprayed and sprinkled on both sides of crop leaves and fruit surfaces.

5.This product should be protected from moisture, exposure to sunlight and heat, and should not be mixed with food, drinking feed and seeds.

When it comes to acaricides, growers will certainly often handle it with caution. Acaricides are mainly used to control herbivorous mites. There are not many acaricide products on the market at present, so which acaricide is better?

What are the precautions for the use of acares? In hot and humid weather, acaricides are sprayed on young crops, which can cause bending or spots on the leaves of young crops, which is less harmful but has no effect on crop growth. Citrus, tangerine, apples in the twig stage of less than 25 cm, the concentration should not be less than 2000 times.

Acaricides can cause damage and cause distortion, deformities and spots on the leaves. For flowers and fruits larger than 25 cm, it should be controlled with a drug concentration of 1500 times. Pesticides are very safe for citrus, pears, grapes, grapes, apples, watermelons, melons, and some other types of citrus, among others.

Citrus agricultural diseases are generally mainly pesticide damage, mainly due to the inhibition of ethephon and gibberellin in plant cells, and the inability of plants to secrete ethylene, resulting in the onset of the disease. For the prevention and control of citrus agricultural diseases, it is necessary to choose high-efficiency, low-toxicity and pollution-free pesticides, which are easy to cause pesticide damage if they are not used carelessly. Secondly, it is necessary to strengthen the monitoring of plant pathogenic microorganisms, improper use will cause an increase in plant pathogenic microorganisms, leading to the occurrence of diseases.

Citrus agricultural diseases mainly include powdery mildew, black spot and anthracnose.

Powdery mildew is caused by the hyphae of pathogenic bacteria that produce a large number of hyphae, causing the spread of the disease. Citrus agricultural diseases usually cause the occurrence of diseases, which are mainly caused by infection and infection of pathogenic bacteria. Among the citrus agricultural diseases, sclerotinia sclerotinia is the main disease, followed by anthracnose.

The main reasons for the occurrence of this disease are: the storage temperature of citrus fruits is too high, which leads to fruit rot; Citrus fruits are stored for too long, resulting in deformity and discoloration of the stored fruits in the later stages of development. Citrus agricultural diseases are mainly caused by bacteria and fungi in citrus fruits, which cause the fruits to turn brown.

In the prevention and control of citrus agricultural diseases, it is necessary to pay attention to the principle of pesticide prevention and control at the right time and in the right amount.

Be careful with the use of acaricides, not on food. Because this potion is harmful to the human body, if sprayed on food, it will affect the human body after being consumed.

Keep away from water sources, pay attention to the frequency of spraying, also pay attention to the time of spraying, grasp the choice of agents, and also pay attention to the composition of agents.

The personal information obtained from the use of acaricides is as follows, first of all, try to choose in the early stage of the pest mite outbreak, when the population density and quantity are small, so as to increase the effective time of the acaricide and reduce the number of uses. Secondly, when the adult mites, nymphs and larval mites of pests coexist at the same time, acaricides with good quick killing and high efficacy that are effective against all insect states of mites should be selected, such as 20% pyridoxin wettable powder, 34% or 41% diesel pyridafen emulsifiable concentrate, 73% gmite emulsifiable concentrate, etc.

Pay attention to the dosage, but also pay attention to the method of spraying, spray evenly, pay attention to the critical situation, and dilute in advance, and also pay attention to the content of the ingredients.

Acaricide refers to the agent used to control herbivorous mites, agricultural mites include red spiders, leaf mites and tea yellow mites, etc., so it is necessary to use acaricide pesticides to prevent them, but what are the pesticides of acaricides? Let's take a look.

1. Butyl etherurea.

Butyl etherurea is a new type of insecticidal acaricide, also known as acaricide, Baolu, etc., with good fast-acting effect and a lasting effect of more than 20 days. Butyl etherurea interferes with the energy metabolism of the nervous system, destroys the basic functions of the nervous system, inhibits chitin synthesis, and generally sees dead insects 2 to 4 hours after application, and red spiders can all die after 2 days.

2. Ethoxazole.

Ethoxazole mainly kills eggs and young mites, is ineffective against adult mites, but has a good effect on female adult mites, the best time for its prevention and control is in the early stage of mite damage, its rain resistance is strong, the effect is slow, the effective period can be as long as 50 days, it is a necessary acaricide at present, usually used as a dispensing agent for egg killing.

3. Alkyne mite special pants reed.

Alkyne mite has contact killing and stomach toxicity effect, effective for adult and if mites, the egg killing effect is relatively poor, if the temperature is above, it can improve the efficacy, alkyne mite is not easy to appear resistant in the current acaricide, and the efficacy is stable.

4. Da mite.

Pyridoxalin is a spectral and contact acaricide, which can be used to control a variety of plant pests. It has a good effect on the whole growth period of mites, namely eggs, young mites, nymphs and adult mites, and also has an obvious quick killing effect on adult mites in the mobile period. The drug is not affected by temperature changes and can achieve satisfactory results regardless of whether it is used in early spring or autumn.

5. Spirodilate.

Spirodiphilol has a contact killing effect, but there is no systemic property, mainly to inhibit the fat synthesis of mites, block energy metabolism, have a good killing effect on young mites and mites, and have a certain egg-killing effect, ineffective for adult mites, but has the effect of inhibiting the hatching rate of female mites laying eggs.

6. Phenylbutyltin.

Phenylbutyltin is a contact type long-acting special acaricide, which is effective against red spiders and rusty ticks, and the effect of other mites is not ideal. The lethality of the adult mite is larger, and the efficacy is poor when the temperature is lower than 22, so the efficacy can be fully exerted when used at high temperature, and the effect is long, and it is relatively safe for natural enemies.

7. Dicofol.

Dicofol is a nerve agent that is effective against adult mites and if full. The drug decomposes slowly, and there is still a small amount of residue one year after the drug. At present, the active ingredient content on the market is: Wild Pure Bright.

Summary. The safe use of acaricides containing alkyne mites at the tender shoot, flowering and young fruit stages of citrus depends on the market drug habits.

The safe use of acaricides containing alkyne mites at the tender shoot, flowering and young fruit stages of citrus depends on the market drug habits.

1) The use of alkyne mites in the tender shoot stage, the flowering stage and the young fruit stage can easily cause pesticide damage and produce flower cracking and teasing fruit. (2) It is forbidden to use special acaricides containing alkyne mites during the whole growth period of oranges and Hongjiang oranges (except for winter garden clearing). Ponkan and Xinhui oranges should be used scientifically in the tender shoot stage, flowering stage and young fruit stage.

Therefore, alkyne mites can be used in the citrus fruit stage, but we must pay attention to the dosage and concentration, and apply the pesticide scientifically.