When using drugs to kill citrus spider mites, how can they effectively kill red spiders without harm

We can choose the way of spraying, which can effectively kill the pests of the fruit trees, so that our collection is richer, and the dosage should be smaller, so that it will not harm the fruit trees.

The type of pesticide should be selected according to the weather temperature of the control time, for example, it is advisable to choose insecticides that are not sensitive to temperature during the low temperature period.

The corresponding pesticides should be sprayed in a timely manner, and the appropriate medicine should be prescribed, and these spider mites should also be caught in a timely manner.

When we go to the store to buy pesticides, we can express our demands to the merchants, and then the merchants will give you the corresponding medicines, and we will fight together, so that we will not hurt the young leaves.

Epoxy is a highly effective acaricide that kills pest mites by inhibiting the embryonic formation of mite eggs and the molting process from young mites to adult mites. Effective against eggs and larvae, but not against adult mites. Therefore, the combination of the above three components has a good control effect on adult mites, nymph mites, larval mites and eggs of spider mites.

Pest mites generally begin to die 2 to 4 hours after administration and can last more than 40 days. It also has a good control effect on pear heartworms, aphids and other pests.

The effect on male adult mites is poor, and the combination of the two has a good killing effect on adult mites, nymph mites, young mites and eggs, and the effective period can reach more than 40 to 50 days. The butyl ether urea in the formula is a new type of high-efficiency thiourea insecticide and acaricide, which has the effects of contact killing, stomach toxicity, systemic and fumigation, with good fast-acting effect and long duration of effect. Dead worms were visible 2 to 4 hours after spraying, and all red spiders died after 2 days.

And it has a certain eggicidal effect; The formula can not only effectively control various insect states of red spider, but also has a good control effect on vegetable diamondback moth, beet armyworm, Spodoptera litura, cabbage worm, rice leaf roller, cotton red spider, aphid and other pests.

The leaves are grayish-white and tarnished, and the leaves are covered with dusty molting shells, causing premature defoliation and seriously affecting the tree's strength. Pale green spots appeared on the surface, and pale yellow spots appeared on the surface after ripe fruit was damaged, with small deformation and poor quality. Due to the damage of the causal pedicle, a large number of fruits are dropped, which greatly reduces the yield and quality of the fruits. Climate change is great, and the appearance of spider mites is becoming longer.

The optimal temperature for breeding is 20-30 °C, and too high or too low a temperature is not conducive to the growth of red spiders. If there is a delay in the onset of high temperatures, or if the onset of low temperatures (< 20) is delayed, the spider mites appear for longer periods of time throughout the year. When citrus is planted in large areas, spider mites are susceptible to cross-infection.

Without the combination of prevention and control, cross-infection is formed. Excessive use of copper preparations and pyrethroids can damage the environment and reduce the natural enemies of spider mites. How do you say this?

For example, organophosphates and pyrethroid insecticides can also kill the natural enemies of spider mites. The copper preparation used to kill canker disease not only kills the natural enemies of the spider mites, but also induces them to lay eggs in large numbers. You're using too much copper and pyrethroids to make spider mites more frequent and harder to kill.

The garden was not completely cleaned and not well trimmed. The tree is too dense; Spider mites are small and relatively hidden, and it is difficult to achieve full coverage by spraying, and it is easy to reverse after the effect of the drug has passed.

Use more drugs, because such drugs are more toxic and can poison the red spider to death.

Spider mites belong to the family of mites, and unlike common pests, they require specialized acaricides to get rid of them. Moreover, spider mites can be harmed all year round, and the degree of damage caused by low temperatures in winter and spring is different from high temperatures in summer and autumn. This requires the selection of highly effective agents according to the climate temperature, because different acaricide ingredients have different active characteristics, some are more affected by temperature, and some are not affected by temperature.

For example, ethoxazole has a higher activity in low temperature climate and has a more efficient killing and inhibition effect on the egg masses of red spider spiders, while spirodifen has higher activity in relatively high temperature climatic conditions and has a better killing effect on red spider egg masses. Acetazolonitrile has higher activity under low temperature conditions, and has a relatively high killing effect on the four forms of red spider.

Citrus red spider It is distributed in various citrus producing areas in China, in addition to harming citrus, it can also harm yellow peel, fig, osmanthus, apple, grapes and so on. It is full and full, and it sucks juice on the peel and causes leaf drop, fruit drop. The affected leaves are dense gray, the size of the needle and even the whole leaf is gray, tarnishing, and finally falling off, which seriously affects the tree strength and yield.

For people who grow citrus fruit trees, it is very important to prevent citrus red spiders, today we will talk about what kind of medicine can be used to kill red spiders, and it can not affect the young leaves of citrus fruit trees.

The prevention and control of citrus red spider should consider the rational use of pesticides from the overall situation of the potato based citrus ecological park, protect and utilize natural enemies, give full play to the natural control of the ecosystem, and control the harm of pests below the allowable economic level. When choosing pesticides, you should first check the instructions for killing red spider pesticides and use them in compounds. Choose different pesticides to use alternately or directly choose the compound agent to kill the red spider, because if you only choose a single agent, the red spider will produce immunity, and slowly a single agent will not be lethal to the red spider.

At the same time, there are three types of pests in the red spider stage, such as mites, larvae and eggs, which should be removed together. So be sure to use it in combination.

First of all, the best time to control spider mites is autumn and the next spring. Use avispirofen in the spring. In winter, stone sulfur mixture is generally used, but stone sulfur mixture can not be used in high concentration in spring, because spring is the first period of citrus tree buds, and the use of high concentration of stone sulfur mixture will cause citrus damage.

While selecting pesticides, it is necessary to choose insecticides with high efficiency and low toxicity, which have a protective effect on heaven and earth or have relatively low toxicity, and are used alternately.

In addition to the use of pesticides, we must learn to use the natural enemies of the red spider, and the effect of preventing and controlling the red spider is also very good. The rational use of natural enemies has a good protective effect on the young shoots of citrus trees, and can produce pollution-free fruits, which is conducive to protecting the environment. 

That's all for me.

Summary. 1. Matrinine.

1) Matrinine has stomach toxicity, contact killing and food rejection effects, and can effectively dissolve the keratin and waxy layer of pests.

2) And the additives with Chinese herbal ingredients are added to it, which can allow the agent to quickly enter the insect body, paralyze the central nervous system of the pest, so as to coagulate the protein of the insect body, block the stomata of the insect body, and suffocate the pest.

3) Matrine has an equal effect on red spiders, scale insects, and thrips.

2. Garlic oil.

1) Garlic oil belongs to sulfide compounds, and it has a special smell (garlic smell).

2) Garlic oil has a contact killing effect on red spiders, eggs, young mites, nymphs, and adult mites, and has a direct killing effect on fungi and bacteria.

3) It also has a prevention and control effect on canker disease and resin disease of citrus trees.

3. Mineral oil.

Mineral oil is able to clog the valves, physically killing the spider mite. Spider mites have no way to develop resistance to mineral oil, and mineral oil can also treat scale insects, soot and other pests and diseases.

Which drugs are most effective in the treatment of citrus red spider?

1. Matrinine (1) Matrinine has stomach toxicity, contact killing and food rejection effects, and can effectively dissolve the keratin and waxy layer of pests. 2) And the additives with Chinese herbal ingredients are added to it, which can allow the agent to quickly enter the insect body, paralyze the central nervous system of the pest, so as to coagulate the protein of the insect body, block the stomata of the insect body, and suffocate the pest. 3) Matrine has an equal effect on red spiders, scale insects, and thrips.

2. Garlic oil (1) Garlic oil is a sulfide compound, and its odor is special (garlic flavor). 2) Garlic oil has a contact killing effect on red spiders, eggs, young mites, nymphs, and adult mites, and has a direct killing effect on fungi and bacteria. 3) It also has a prevention and control effect on canker disease and resin disease of citrus trees.

3. Mineral oil can block the valve and kill the spider mite by physical means. Spider mites have no way to develop resistance to mineral oil, and mineral oil can also treat scale insects, soot and other pests and diseases.

** plan 1 of citrus red spider and general** citrus red spider disease, it is necessary to spray 2 times with wood edge with orange matrine 1000 times + garlic oil 1000 times + mineral oil. 2. The interval between each time is 7-10 days. After spraying, the effective period can be as long as 3 months under ideal conditions.

3. However, due to the influence of the surrounding environment and climatic environment in actual production, the general effective period is about 1-2 slag base leakage months.

Citrus red spider overwinters in the back of citrus leaves, rolled leaves, branches, bud crevices or deciduous dead branches in the back of citrus leaves, and the temperature rises in March and April of the following year, and the egg development starts at the starting temperature, and the overwintering eggs hatch into adults in large quantities, migrating from the old leaves to the new leaves of the spring shoots to reproduce. From July to August, due to the high temperature and heat, it is not conducive to the growth and development of red spiders, and the number of insect populations is small. From September to October, the temperature drops, and the insect population rises again, which is the second peak of the insect population.

It is necessary to spray the drug in the areas where the red spiders are often found on the citrus trees, so that they can be eliminated from the most fundamental source.

x0d x0a It is a more scientific prevention and control method to pay attention to the rational use of drugs, cooperate with the release of the natural enemies of citrus red spiders and reduce the dosage to avoid accidental injury to natural enemies.

Spider mites are a pest of citrus that is relatively small but more harmful on its fruit trees. When the temperature rises in spring, reproductive activity begins. When the temperature is around 25 degrees, it happens and develops rapidly.

The rate of reproduction and growth is also at its peak, with overlapping generations. There are several forms of adults, nymphs and eggs throughout the year, which creates certain difficulties for prevention and control efforts. Here, according to the local red spider in the process of red spider control, the occurrence characteristics of red spider and related control experience are summarized for the reference of fruit farmers.

Citrus red spider main damage time: Although citrus red spider mites are present throughout the year, the time of year to cause damage is usually from May to June and September. Spider mites are the most abundant and most harmful at the time.

Due to the high temperatures from July to August, when the temperature exceeds 32 degrees, the number of spider mites will decrease significantly, and the degree of destruction will also be reduced.

Citrus red spider control method and time selection:

1. In the prevention and control of citrus red spider, in order to reduce the antiviral resistance of drug resistance of red spider, alternative drugs are generally selected in the prevention and control of drugs. By alternating insecticides and mite drugs with different mechanisms of action, the occurrence of resistance in spider mites can be inhibited.

2. After the temperature rises in the spring, before the citrus sprouts, combined with the cleaning of the garden, measures for the prevention and control of drugs are taken. At this time, due to the small number of citrus red spiders, it is very beneficial for prevention and control effects. Target.

As long as the population base of citrus red spider is controlled, it is possible to prevent the prevention and control of citrus red spider throughout the year.

3. Before the beginning of the severe occurrence period of citrus red spider every year, the prevention and control drugs are carried out in advance, and according to the prevention and control effect of the drugs and the changes in the weather, 1 to 2 are carried out in the middle, and the second is to strengthen the drugs.

How to effectively prevent red spider mites on citrus trees:

The specific medication time should be selected according to the actual local situation. After examination, if the density of spider mites is not high, the drug is usually started in early May and mid-June, depending on the situation. Prevention and control will be carried out once in mid-August, citrus again in late September, and then bagging fruit, and it will be more difficult to prevent and control the damage of spider mite bagging in the later stage.

Pesticides can be sprayed because pesticides can kill both the spider mites and their eggs.

In the early stage of prevention, 5 avermectin microemulsion can be sprayed 2000 times, and in the later stage, emamectin mite urea suspension, 50 phenylbutyltin suspension, 43 diphenylhydrazide suspension can be sprayed, and then 1000-1500 times of sodium renitrophenol microemulsion can be added when spraying the above agents for prevention and control, which can improve the efficacy and promote growth.