Prevention and control of red spiders, how to prevent red spiders?

The flowers are in pots, placed in a sunny room every day, and the roots of the flowers are cleaned every day. So that there will be no spiders. Advanced dimethoate 1:30-100 to spray water is fine.

Avermectin is combined with pyridoxin [insecticides with mites can be used].

It can be removed with a small brush in time or sprayed with 100 150 times No. 20 gasoline emulsion, etc., and can also be sprayed with 40 dimethoate emulsifiable concentrate 1000 times liquid to prevent scale insects, 40 ammonia dicarol emulsifiable concentrate 1000 to 1500 times liquid to prevent and control red spiders, and at the same time can reduce the occurrence of soot disease.

Make your own pesticides.

With chili peppers.

Prevention and control methods: drug control can generally spray a mixture of 10% phenylpyridoxin (1000 times the solution) + emamectin benzoate emulsifiable concentrate (3000 times the solution), and biological control can generally use the protection of its natural enemies (such as small flower bugs, bundle tube food mite ladybug, phytosui, large lacewing) to control the number of red spiders. Other effective drugs to control spider mites:

Ickami, Jin Manzhi, Ke Mites, Pyrida Mite, etc.

1. How to prevent and control spider mites.

1. Protect the natural enemies of red spiders.

There are many types and numbers of natural enemies of red spiders, such as heterochromatic ladybugs, small flower bugs, bundle tube mite ladybugs, deep-spotted mite ladybugs, plant mites, large lacewings, small lacewings, etc., and protecting them can play a positive role in controlling the number of red spiders.

2. Strengthen management.

Spider mites are a pest that likes to move in high temperatures, and its development cycle, reproduction rate is also related to temperature, usually when the weather is relatively dry, hot will break out in large numbers of red spiders, so we must strengthen the management of the field in the high temperature and dry season.

3. Drug prevention and treatment.

Spray with a mixture of 10% phenylpyridoxin (1000 times liquid) + emamectin benzoate emulsifiable concentrate (3000 times liquid), and good control effects can generally be achieved after application.

1.Humid environment: Spider mites prefer to grow and reproduce in humid and noisy environments. If the walls, floors, ceilings, etc., in your home are damp, then spider mites may breed in these places.

2.Moderate temperature: Spider mites also need the right temperature to grow and reproduce. During the warmer indoor seasons, such as summer and spring, spider mites are more likely to breed and reproduce.

3.Presence of parasitic bumpers: Spider mites mostly live on insects and plants, and if there are a large number of these hosts near your home, the number of spider mites will also increase.

4.Lack of cleanliness: If the room is not clean enough, the breeding population of spider mites is more likely to increase. If the house is not cleaned for a long time, and clutter such as tableware is left indiscriminately, it will provide a place for spider mites to breed.

In order to control the breeding of red mites, it is first necessary to improve household hygiene, keep the environment dry and clean, and clean regularly. For items such as plants and indoor furniture, keep them dry and ventilated, clean and dust them regularly. If the RB breeds too much, it can be controlled with a special insecticide for the RB.

Spider mites are a pest that harms crops, mainly attacking plants such as vegetables, flowers, etc., causing plants to weaken, leaves to yellow, and even death. In order to control spider mites, the following measures need to be taken:1

Maintain ecological balance: protect natural enemies such as mites, spiders, birds, etc., and control the population of spider mites. 2.

Improve environmental hygiene: Keep indoors, greenhouses and fields clean and hygienic to reduce the breeding and spread of spider mites. 3.

Adjust the ambient temperature: The suitable temperature for red spider spiders is 25-30 degrees Celsius, and the reproduction and growth of red spiders can be prevented by cooling or humidifying. 4.

Use of chemicals: In the case of severe infection, pesticides can be used, but they should be used in a precise way and in sufficient dosage to avoid harm to the human body and the environment.

It can be controlled with pesticides.

Plants with spider mites are sprayed with chemical pesticides separately to ensure that the source of the insect is eliminated and the transmission between them and other plants is interrupted. The effective agents are: butaflufenoxilate, bifenazide, ethoxazole, thiobenone, spirodifenolate, avermectin, gramamine and other alternate mu such as use.

99% mineral oil 200 times plus avermectin 2000 times, or 5% thiobenone emulsifiable concentrate 1500 times liquid spray, or 43% bifenazide ester suspension 2000 times; 7 days of prevention and treatment, 2 3 times of continuous prevention, a variety of agents alternate use of better effect.

Whenever possible, acaricides of mineral origin, such as mineral oil, are preferred. Mineral oil is relatively susceptible to pesticide damage, so caution should be exercised in high temperature, drought, weak tree, flowering period, physiological fruit drop period, veraison period and other pesticides. However, red spiders have no way to develop resistance to mineral oil, and mineral oil can also treat scale insects, soot disease and other pests and diseases.

Notes:

Spider mites are basically not done with Nahong has systemic conductivity, and the drug will not have an effect if it does not directly touch the eggs of the worm, and the place where the red spider occurs the most is the leaf peduncle on the back of the leaf, which is more difficult to spray, so the pure spray must be meticulous and thoughtful to ensure full infiltration, otherwise it will be useless.

There are two peak periods of red spider occurrence in a year, from April to June and from August to October, so prevention in advance when the peak is about to come will have a double effect with half the effort, such as early April and early August, which can be focused on prevention and control.

How to prevent and control it, because red spiders generally occur frequently in high temperature and arid environments, it is necessary to pay attention to timely prevention and control at high temperatures, and also change the maintenance environment. It can also be used to help eliminate its natural enemies, such as small bugs, heterochromatic ladybugs, phytosis mites, and bundle-feeding mite ladybugs. In addition, if the insect infestation is more serious, it is recommended to spray**, you can use 10% phenylpyridoxin emulsifiable concentrate 1000 times, or mix with emamectin benzoate emulsifiable concentrate 3000 times, so that the spraying effect will be better.

How does it affect the plant.

Spider mites have a wide range of sub-code greeting and mixed feeding habits, and can harm more than 110 kinds of plants. It is mainly a legumeaceae, solanaceae, cucurbitaceae and lily family. In spring, when the temperature rises and the plants begin to germinate, the female adult mites that are late in winter, the red spider begins to damage the plants, first to the leaves, and later to cover the entire leaves, and will also spread by the wind.

Usually July to August is the peak period, resulting in yellowing and whitening of fully ripe leaves, which seriously affects normal growth and may even lead to death.

The control of spider mites should be based on agricultural control, and the application of biological control and chemical control should be coordinated. In terms of strategy, we should focus on the occurrence stage of point slices and control the damage to a minimum.

1) Agricultural control.

Clean the countryside. At the end of autumn, the leaves of the field are burned or manure to reduce the overwintering places of spider mites. After the beginning of spring, before planting, remove the residual branches and leaves and weeds in the field and at the edge of the field to eliminate the source of insects that overwinter in the field.

Strengthen field management. Especially in dry weather, pay attention to irrigation and combine fertilization to promote the healthy growth of plants and enhance resistance.

2) Chemical control.

On the basis of strengthening the monitoring of pests and mites in the field, timely selection and treatment should be carried out in the stage of spot occurrence to avoid the outbreak of patches. In recent years, due to the continuous use of chemical pesticides, especially the unreasonable type, concentration and application period of pesticides, leaf mites have developed resistance, and due to a large number of natural enemies, it has become rampant. Therefore, the application of chemical pesticides should pay attention to the rotation of different types of agents, the use of compound synergist agents or some new special agents.

At present, there are many chemical agents that can be used, such as 20% metamidine emulsifiable concentrate 1000 times, 73% alkyne mite emulsifiable concentrate 1000 1500 times, 40% chrysanthemum horse emulsifiable concentrate 2000 3000 times, 25% miteicidal wettable powder 1000 1500 times, 5% fipronidine emulsifiable concentrate 1000 1200 times, bifenthrin emulsifiable concentrate 1500 times, etc.

Red spiders, commonly known as "red worms", mainly gather eggplant and pepper leaves. The affected leaves first form small white spots, then fade to yellow-white, and in severe cases, they become rusty brown, causing the leaves to fall off, the fruits to dry up, and the plants to die. If the fruit is damaged, the peel becomes thicker and pinhole-like brown spots are formed, which affects the quality of the fruit.

Spider mites mainly overwinter on weeds in various insect states such as adults, eggs, larvae, nymphs, etc., generally occurring in 10 20 generations a year, and 6 and 8 months are the peak period of occurrence of the insect, which is easy to occur in drought and high temperature years. Unlike the tea yellow mites, the red spider generally occurs at a temperature above 25, and usually starts from the middle of the plant, and the leaves turn yellow and fall off the leaves.

Control methods: timely removal of weeds and crop residues in the field, reduce the source of insects, spray protection at the beginning of pests, can use 20% good winter 2000 times, 1% insecticide 2000 times liquid spraying, spray every 7 10 days.

The control of red spider spider should be combined with agricultural control, biological control and pesticide control, timely selection and treatment when spotting occurs, and general control should be carried out immediately when there are more than 5% of mite strains. The specific measures are as follows:

1) Remove weeds in the field, on the ground and at the edge of the ditch at any time, and completely remove the residual branches and leaves in the field after harvest to reduce the source of overwintering mites. In autumn, deep ploughing of vegetable patches destroys the wintering grounds of spider mites.

2) Rational application of nitrogen fertilizer and increased application of phosphorus fertilizer to improve plant resistance to damage. Pay attention to reasonable watering, summer and autumn high temperature and drought must be timely drought watering, control the development of mite damage.

3) When the density is low, the ratio of leaf mites to predator mites 20 1 is released, and it is released once every 10 days since mid-June, a total of 2 3 times.

4) When chemical prevention and control must be carried out, attention should be paid to the selection of pesticides with low lethality to natural enemies, and attention should be paid to the rotation of different types of pesticides to avoid harming natural enemies and leading to drug resistance.

1) Agricultural control.

Mulching cultivation can significantly reduce the damage, remove the pastoral, autumn tillage and damage its habitat environment.

2) Lime belt seedling protection.

5 7 kg of quicklime per 667 m2 is sprinkled on the edge of the ditch, at the head of the ground or between the rows of crops during the damage period to repel insect bodies and damage crop seedlings.

3) Paraacetaldehyde is used for chemical control to prepare soybean cake flour or corn flour poison bait containing about 4% of the active ingredient, and sprinkle it on the ridge of the field in the evening to trap it; or sprinkle 22 kg per 667 meters with 8% phosphorus dichlorvos granules; Or in the early morning, when the snail has not dived into the soil, spray 800 1000 times of phosphorus, dichlorvos or copper sulfate.

(1) Remove weeds in the field in time, reduce the feeding and breeding grounds of red spiders, and reduce the number of insect populations.

2) Coated with seed coating agent containing systemic insecticide ingredients.

3) When the spot piece occurs, timely carry out pesticide control, with 20% sweep mite net 2000 times liquid, 41% Jinba mite 3000 4000 times liquid, 5% Nisolan 2000 times liquid spray, can also use 20% mite kill net suspension 3000 times plus 20% mite emulsifiable concentrate 2000 times of the mixture, spray control focus on the back of the middle and lower leaves.