How to deal with citrus red spider in a comprehensive way?

1. Orchard grass cover, improve the environment to promote natural enemy activities, protect and disperse predator mites, and establish a stable predator mite community are very important for long-term inhibition of red spiders, which is a fundamental measure for the prevention and control of citrus red spiders. The so-called grass cover refers to the retention or planting of shallow-rooted weeds such as thistle between the citrus rows, because the pollen of the thistle and a small rodent growing on the plant are suitable food for a variety of predatory mites, which is conducive to the establishment of long-term and stable predator mite communities in citrus orchards to control the occurrence of red spiders. Moreover, covering the thistle can regulate the temperature and humidity of the citrus orchard, so that another nemesis of the red spider - bud mold can multiply and parasitize.

At the same time, it can reduce the temperature of orchard soil during midsummer, which is conducive to the normal growth of citrus roots and improves the resistance and insect resistance of the tree.

2. Chemical control is an important means to deal with citrus red spiders. When carrying out chemical control, special emphasis should be placed on the guidance of investigation and monitoring, and only when the control indicators are reached (the average number of lobates in spring and autumn is 100-200; The number of lobates per filvia is 300-400 in summer and winter), and the number of natural enemies is small, before chemical control can be decided. The available agents are 20% dicofol or 20% dicofil 800-1000 times; 20% metamidine, 20% Beleba, 5% Nisolone, 50% Tork or 50% mite for 1500-2000 times; 1000-3000 times of 73% gmite solution; or 20% tachydione 4000 times.

In addition, dimethoate, malathion, imidophos, colloidal sulfur, petroleum emulsion, etc. also have good control effects. In particular, neem oil and 1% high-lipid membrane have a good effect on spider mites, but have low toxicity to natural enemies such as predatory mites, which has positive significance for coordinating the contradiction between chemical control and biological control. <>

1. Prevention and control of citrus red spider method 1: grass covering.

Red spider and yellow spider have a large number of natural enemies, such as six-point thrips, predatory mites, etc. are their natural enemies, you can choose some white flowers and stinky grass in the orchard to cover the ground of the orchard, so as to provide the growth environment of the natural enemies of red spiders.

2.The second method to control citrus red spider spider: release natural enemies - predatory mites.

This is a biological environmental protection ** red spider, mites to control mites is particularly scientific, when the red spider grows in large numbers, put a small bag of predator mites on each tree, so that these spider insects can be killed.

3.Method 3 for the prevention and control of citrus red spider: drug control.

There are many drugs that can be used for citrus red spider, such as "green crystal" azadirachtin emulsifiable concentrate 3500-7000 times (, diesel emulsion, etc., which are very good, and can be used in both spring and summer.

4.Method 4 of citrus red spider control: consider the <> comprehensively

If the orchard releases predatory mites, it is best to use less pesticides and use some drugs that cause little harm to mites.

Citrus red spider.

Rust spiders belong to the order Tick Mites. Adult mites, mites and young mites suck the sap of citrus leaves, twigs and fruits, which affects tree strength and yield when the damage is severe.

1. Biological control.

1) Protection and utilization of natural enemies. Eradicate malignant weeds in the orchard, retain benign weeds or artificially plant white flowers, protect natural enemies, and provide habitat and breeding places for natural enemies.

2) Unleash predators. Artificially release predatory mites to control the occurrence of red spiders and rust spiders. Generally, from early April to early to mid-August, release 1 2 times, and release more than 300 predator mites per plant each time. Acaricides and broad-spectrum insecticides should not be used during mite release.

2. Chemical control.

1) Young fruit stage in spring. For the control of red spiders, 5000 times of 11% ethoxazole suspension, or 4000 times of 24% spirodifenoxil suspension, or 1500 times of 5% thioxenone EC were sprayed.

To control rust spiders, spray with 20% butyl sulfur carbofuran EC 1500 2000 times.

2) Fruit expansion period to maturity stage. For the prevention and control of red spiders, 24% spirodifen suspension agent 4000 5000 times is sprayed.

To control rust spiders, use 20% butyl sulfur carbofuran emulsifiable concentrate 1500 2000 times, or engine oil emulsion 500 times liquid.

3) Clearing the garden in winter. Use 73% alkyne mite emulsifiable concentrate 2000 3000 times, or 5% azolodifen emulsifiable concentrate 2000 2500 times, or engine oil emulsion 500 times and so on.

3. Precautions.

Citrus shoots and young fruits are more sensitive to acaricides, and improper use is easy to cause pesticide damage, so choose to use acaricides according to different periods.

The control measures for citrus red spider and rust spider are as follows:

1. Agricultural prevention and control. Reasonable pruning in combination with garden cleaning to prevent excessive shade of the canopy. Strengthen fertilizer and water management to enhance tree strength.

2. Biological control. Favorable conditions can be created for the reproduction of natural enemies by keeping shallow roots, benign weeds such as thistle or twisted mountain mung bean in citrus orchards, or planting green manure and other mulching plants. In the summer and autumn when rust spiders occur in large numbers, the use of copper-containing fungicides such as Bordeaux liquid should be avoided as much as possible.

3. Pharmaceutical prevention and control. Strengthen the insect inspection, check the back of the spring leaf or the back of the young fruit, pay special attention to the drooping inner fruit, an average of 2 3 rust spiders or leaves, when there is yellowish dust on the young fruit, the drug should be immediately controlled.

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The insect pest red spider on citrus fruit trees is a fruit tree insect pest with strong reproductive ability, generally speaking, it occurs in all the growth periods of citrus, the reproductive ability of citrus red spider and the degree of harm are related to the environmental temperature, when the weather temperature is lower than 10 degrees and higher than 32 degrees, the activity ability is significantly reduced, and the harm to fruit trees is also correspondingly weakened.

Control methods of citrus red spidersThe control of red spiders in citrus fruit trees is mainly divided into two categories: drug control and physical control. Physical control is mainly to cultivate the natural enemies of red spider to suppress its occurrence base, and at the same time enhance the tree potential of the fruit tree itself, which can effectively resist the harm of red spider to fruit trees. Only due to the changes in the natural environment and the excessive use of pesticides, relying solely on natural enemies to inhibit citrus red spiders, for most citrus orchards, the effect is not very good, in some ecological orchards, the effect of physical control is obvious, in addition to reducing the cost of pesticide use and labor costs, it also has a direct effect on improving the quality of fruits.

The pesticide control of citrus red spider is now the method adopted by most orchards, and the control agent of red spider will be added in almost all the control processes of citrus pests and diseases. Generally speaking, for each citrus red spider control drug, there will be more than 2-3 single pesticide mixtures, or single products plus compound pesticides, unlike other pest control pests that can be solved by spraying with a pesticide.

In addition to the fact that red spider mites have multiple forms of pesticides that need different insecticidal mechanisms on citrus fruit trees, the main reason is that red spider mites are highly resistant, and it is easy to develop drug resistance and affect the control effect.

For the prevention and control of citrus red spiders, there is no convenient saying that for the prevention and control of citrus red spiders, there has never been a one-and-done pesticide, and some are just constantly improving categories, from single products to compounds, from low doses to high content. The service life of various agents is not very long, generally each new product will be eliminated after 3-5 years, and only a few categories will continue to be used, the more common is a single product such as avermectin or its compound pesticides.

In the control of citrus red spider medicine, in addition to avermectin, the more convenient and continuous use of the agent is mineral oil, because it belongs to the function of physical control, red spider will not produce resistance, can be used many times continuously.

Mineral oil is a substitute for the previous oil emulsion, it has a high degree of emulsification, compared with the oil emulsion, it is easier to water, and will not be separated from water, it is a kind of insect control effect in addition to a certain disease prevention effect, and the ** is relatively low, almost can be mixed with most pesticides without affecting each other.

In short, to say that the prevention and control of citrus red spider is first of all to prevent early, less and less. In addition to containing pesticides that kill insects and eggs, the chemicals used should also be selected and used in combination with the weather temperature. Generally, most of the conventional dispensing drugs are mineral oil plus insecticides, ovicides or avermectin single products and compounds, and then combined with one or two insecticides and eggicidal pesticides.

I think that dadafen is the most convenient, because the effect of this pesticide is very great, it can remove pests and diseases very well, so many people will use this pesticide.

Citrus red spider is controlled with pesticides such as pine resin mixture, avermectin, and gite. Generally, in winter and spring, 18-20 times of pine resin mixture, 10-20 times of pine resin mixture in summer and autumn, or 20-250 times of 99% green mineral oil, 1000-1500 times of avermectin, and 2000 times of 57% gmite.

There are no pesticides, because citrus red spiders are inherently resistant and will refuse some drugs, so any drugs have no effect.

Ethoxy polytrisiloxane (modified silicone) 2,000 times, Guoguang red kill 2,500 times (kill high resistance), pyripropyl ether (kill eggs). Adults die when they dry up. None within 30 days**.

If you want the garden to be clean, don't use 70 copper hydroxide. Citrus ulcer prevention and control, our refusal of copper will make your garden fall into a strange circle of non-stop medication.

In fact, it is quite convenient to directly play pyridoxine and tetramitezine, and this is also a special medicine for the treatment of this kind of red spider.