Red spider is also known as cotton red spider, commonly known as big spider, big dragon, sand dragon, etc., the scientific name is leafhopper. In recent years, the red spider is very serious and the prevention is very difficult. If the prevention and treatment method is wrong, it will be more and more preventive. Why? So how should Red Spider control it? There are many areas that use physical methods to control and chemical methods. One is to use the return ( contact 13203809264 ), which is a granular silicon fertilizer, which kills the red spider by piercing the red spider epidermis. There is also a kind of predation cockroaches, but the time to put on the predation cockroaches is too slow, chemical drugs should pay attention to the replacement of drugs, spraying should be complete, Xiaobian today to tell everyone about the reference.
Why is Red Spider difficult to fight?
1. Starscream is not an insect, so many insecticides do not work for it.
2. It is difficult for a red spider drug to cover four forms of red spider at the same time.
Red spider has a large reproductive coefficient and frequent generations. There are four forms of eggs, cubs, nymphs and mites on one leaf. There is no acaricide that can be effective and effective for all four forms at the same time.
3, the size of the red spider is relatively hidden, it is difficult to achieve full coverage of the spray, the effect is easy to rebound after the past
4. Environmental and management model factors
There are many generations of pests and diseases in the southern producing areas of citrus, and high-frequency pesticides are needed to prevent Huanglong disease. Some orange gardens must use copper preparations to prevent ulcer disease, and the natural enemies of the mites are killed. The large amount of pesticides also makes the mites available. Extremely high resistance, so the southern producing areas are more difficult to manage than the northern producing areas.
5. Practitioners do not have the relevant technology
The above table lists 51 kinds of pesticides that are effective in selling spider mites in the market. How many people can know what kind of mites are these pesticides? What kind of mites are there? What are the advantages and disadvantages? How is resistance classified? Which is the distribution? Month use? How to match other drugs?
6. Market behavior factors
The episodes of seizures can cause serious losses. The growers hate it and like to smash the red spiders; pesticide manufacturers add hidden components to seize the market's outstanding effects; pharmacies worry that the products are not exaggerated and the growers will no longer patronize them. The sale of multi-complexed acaricides has resulted in the popularity of large prescriptions on the market. One bottle can't hold multiple bottles of multiple ingredients, and ** accelerates the arrival of red spider resistance.
Solution
1. General guiding principles
Minimize the number of pesticides and the number of deliveries under the premise of ensuring the control effect
The use of red spider drugs in the northern citrus producing areas is obviously less than that in the southern producing areas, but it must not be attributed to the fact that the growers in the northern producing areas have higher levels of drug use than the southern growers. The northern citrus producing area is highly manageable because it has been used for a long time. Less, the red spider has low resistance, and the orchard ecology has not been seriously damaged.
No grower can kill the red spider. After the drug is applied, the spider will return with resistance. Therefore, it is better to use the drug. The drug must be scientifically organized under the premise of ensuring the effect. Minimize delivery. ** Going to the money, all the lungs are poisonous.
Use mineral source acaricides such as mineral oil as much as possible
Mineral oil is relatively easy to toxic, and should be cautious in high temperature, drought, weak tree, flowering period, physiological fruiting period, color change period and compounding other pesticides. However, Starscream has no way to resist mineral oil. At the same time, mineral oil can treat both pests and soots and soots. The stone-sulfur mixture winter and spring gardens can be combined with disease and disease, and they should be included in the use plan as much as possible.
Protect the use of natural enemies as much as possible
Musk sinensis is a good transgenic host of the natural enemies of the orangery. The cultivation of Huoxiangyu in the orangery can provide rich pollen as a foodstuff for the predatory carp, thereby increasing the number of beneficial mites in the orange grove and reducing the harm of mites to some extent.
(藿香蓟)
Spray quality is the premise of all effects
No matter what medicine or technique you use, the quality of the spray is guaranteed. The red spider drug basically has no systemic conductivity. The drug does not directly touch the insect egg, and the effect is not effective. The place where the red spider occurs most is the leaf stalk at the back of the blade, which is difficult to spray, so the spray must be Careful and thoughtful, to ensure full infiltration, otherwise it will be laborious and ineffective.
2, master the drug and resistance, to achieve reasonable application
The characteristics of the spider nectar drug (including the hidden components of the pesticide) must be mastered by the practitioner. Only by mastering the characteristics of the drug can it be used with half the effort.
List of Acaricides (partial)
Managers know very little about the resistance of this orchard to the drug, and naturally it is impossible to use the drug accurately. Therefore, it is very necessary to investigate the resistance of orchard red spiders, and to understand the resistance of red spiders. What kind of medicine is used in their own orchards? This is especially the case for large orchards.
(drug test)
3, some tips
Reasonable gradual compounding ------- Ethylcarbazole alone is not enough, then we can use carbendazole together with avermectin, the killing effect will be significantly improved. If you are not satisfied, you can use the carbendazole * avermectin in combination with the insecticide profenofos, the killing effect will be better, and the worms will cure both;
If the snail is not used alone, then we can use avermectin at the same time as the snail, and the killing effect will be significantly improved. If you are not satisfied, you can use the snail* avermectin together with the insecticide triazophos, the killing effect will be better, and the worms will cure.
When the above ternary compounding is not enough to control the red spider, it can be combined with the fungicide mancozeb, insects
Both the disease and the disease. It should be noted that such a large prescription is more likely to cause phytotoxicity, and it is necessary to select high-quality pesticides and avoid using them as much as possible during the young fruit period.
According to the regular occurrence of spider mites, the occurrence of red spiders is related to temperature. In the case of normal management, there will be two high-incidence periods in one year, and the long-term acaricides will be used to prevent and control at the beginning of the high-risk period. It has a multiplier effect.
List of Acaricides (partial)
It can also be re-protected once the temperature of the red spider is lowered at the beginning of May and the beginning of June, and then only the rust wall cockroaches need to be controlled during the high temperature season. The rust wall cockroach can be treated with the insecticide butyl thiocarbamate or the fungicide Dyson. Manganese and zinc are taken care of together, so that the overall cost of prevention will be reduced.
Small changes in the spraying mode - ------- If you think that the conventional control effect is not ideal, you can use the carbine tactics: first hit the quick-acting acaricide, and when the medicine drops, the cockroach eggs gradually hatch. In the day, you can get a quick-acting + long-acting acaricide to get better control results.
Red spider features:
In the first generation of 13 generations, the eggs overwinter, the wintering eggs generally begin to hatch in early March, and all hatching is completed in early April. After the winter, the first to third generations mainly breed on the ground weeds, and after 4 generations, they begin to harm the fruit trees and vegetables. In mid-to-late October, it began to enter the wintering period.
Reasons for Red Spider Control
1. Red spider has a large reproductive coefficient, frequent generations, and there are four forms of eggs, cubs, nymphs and mites on one leaf. There is no acaricide that can be effective and effective for all four forms at the same time.
2. Red spider is very small, like to hide in the back of the leaf to suck the juice to be carefully seen to see, and wait until the front of the leaf shows symptoms, often the situation is already more serious.
3. There are many generations of pests and diseases in the greenhouse, and the use of pesticides for high frequency is needed. Some vegetable gardens must use copper preparations to prevent ulcer disease. The natural enemies of the pests are killed. The large amount of pesticides also makes the alfalfas extremely high. Resistance.
4. A large number of red spiders and silkworms can protect against pesticides and adverse environment, which is one of the reasons why red spiders are difficult to cure.
5. Long-term single use of a small number of acaricides can cause resistance or drug resistance.
Red spider agricultural control method
1. Rational application of chemical fertilizers, reasonable proportion of nitrogen, phosphorus and potassium, avoiding partial application of nitrogen fertilizer, excessive nitrogen leaves and long shoots, frequent new shoots, providing an ideal breeding ground for spider mites, and excessive red potato orchard often occurs seriously.
2. Remove the bottom yellow leaves, old leaves, diseased leaves and sick fruits in time to ensure adequate nutrient supply.
3. Do a good job of clearing the garden and pruning in winter, so that the tree body is ventilated and light-transmitted, reducing the source of insects and facilitating the coverage of pesticides. The stone-sulfur mixture can be used for winter and spring clearing, so that both diseases can be taken care of.
Red spider biological control method
In the pollution-free, green and organic agricultural production bases, it is best to release predatory mites, which should be released at the initial stage of red spiders. The temperature of the greenhouse is kept at 15 °C ~ 35 °C, humidity is 60% ~ 85%, and pesticides are prohibited in the whole process. Avoid killing natural enemies.
Try to lower the number of red spiders before releasing the predatory mites, and use the butyl fluoride to carry out pest control. After 5-10 days of treatment, the predatory mites are released according to the benefit ratio of 1:10 to 1:30.
A predator can prey on 300 to 500 red spiders in a lifetime, and also sucks on the eggs of the mites, which can effectively control the red spiders.
Red spider chemical control
The plants with red spiders are sprayed with chemical pesticides alone to ensure the elimination of the insect source and block the spread between it and other plants.
The effective agents are: butyl fluoride resin, biphenyl oxime ester, acetazol, thiazolone, spiro sterol ester, avermectin, ketone and the like.
Use 99% mineral oil 200 times plus 1.8% avermectin 2000 times, or 5% thiazolone 1500 times liquid spray, or add 43% biphenyl phthalate suspension 2000 times; 7 days control, continuous control 2 ~3 times, the effect of alternating multiple drugs is better
Mineral source acaricides such as mineral oil are preferred as much as possible. Mineral oil is relatively easy to toxic, and should be cautious in high temperature, drought, weak tree, flowering period, physiological fruiting period, color change period and compounding other pesticides. However, Star Spider has no way to produce resistance to mineral oil, and mineral oil can treat both pests and soots and soots.
Precautions:
The red spider drug basically has no systemic conductivity. The drug does not directly touch the insect egg, and the effect is not effective. The place where the red spider occurs most is the leaf stalk at the back of the blade, which is difficult to spray, so the spray must be Careful and thoughtful, to ensure full infiltration, otherwise it will be laborious and ineffective.
Tips: There are two peaks in Starbucks every year, from April to June, from August to October. Therefore, prevention in advance when peaks are about to come will have a multiplier effect, such as early April and early August. Can focus on prevention and control.
Some rumors about the control of Red Spider:
There are a lot of rumors about the use of remedies for pests, especially red spiders. Many of the students in the forum often reprint. I think these reprinted students have never used them. Otherwise, they will not be rumored. I don’t know about these rumors. I have tried several to tell you.
Cigarette water: Ineffective, will the red spider's tobacco leaves die and finish the upgrade and successfully become unsuccessful, and the limited nicotine in the tar is to make the red spider get lung cancer?
Washing powder: Ineffective, it may be able to kill some pests, but it is really ineffective, Starscream is not smudge, is it necessary to have a washing machine? Of course, there are very few successful students, I want to say that your Starscream is very kind.
Alcohol: Invalid, want to let it drunk?
Milk: Very limited effect, the legend is that Taiwanese farmers use it on strawberries. LZ has tried it a few times. For the first time, it feels a little bit of effect. After that, I don’t know it anymore. Maybe they don’t like the milk of that taste. .
Capsicum water: Ineffective, comparable to the torture of the Kuomintang. After the spray, my corn poppy leaves are rolled up, and the red spider is still there.
Garlic juice: Ineffective, not as good as direct water spray, maybe some dumplings, red spiders will like to eat.
Dishwashing liquid: Ineffective, although it can increase the sucking power of pesticides, the only use of the last only spots on the leaves, the red spider will walk around them flour: a little effect, want to die they
Water: As long as the plants are licked, more water can be washed away, but in the hot and humid April-May, the plants are really easy to hang.
Predatory cockroaches: This method is good for pest control, but the effect is really slow. There are 10 bags under the LZ small balcony. It should be said that there are tens of thousands, but they have disappeared for a while. And their size is half the size of Xiaohong, it is hard to find out if they are working.
Mosquito coil: This is my focus, invalid, and LZ also added sulfur powder, this should be highly toxic, but, however, LZ almost fainted, on the dry leaves, Xiaohong is still healthy.
This article URL: How to effectively prevent red spiders from killing time and what are the special drugs on the market?
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