What to use to put the spotted submarine fly in vegetables? 50

Vegetables generally need to be sprayed with pesticides, but there are also vegetables that do not need pesticides, such as small areas of sweet potato leaves, white radish, carrots, green onions, leeks, etc. 1. Do not eat vegetables with abnormal shape and color and normal color, which are generally cultivated conventionally and are not treated with chemicals such as hormones, so you can eat them with confidence. "Abnormal" vegetables may have been treated with hormones, such as leeks, when its leaves are particularly wide and fat, 1 times wider than the average broad-leaved leek, it may have been used in the cultivation process, and the leaves of leeks without hormones are narrower and have a strong flavor when eaten.

Some vegetables are not normal in color, but also pay attention to, such as grass leaves lose their usual green and are dark green, edamame green is abnormal, etc., they may be sprayed or soaked in ammonium phosphorus pesticides before harvesting, and should not be purchased. Some vegetables with abnormal shapes and colors are found to be new varieties after verification, and this is a different matter. 2. Don't eat "multi-insect" and "multi-drug" vegetables Among the many vegetables, some vegetables are particularly favored by pests and can be called "multi-insect vegetables"; Some vegetable pests don't like to eat much, so they can be called "insect-less vegetables".

It is determined by the specificity of the different components and odors of the vegetables. Among the multi-insect vegetables, the "famous" ones are greens, Chinese cabbage, cabbage, cauliflower, etc., and the less insect vegetables are chrysanthemum, lettuce, celery, carrots, onions, garlic, leeks, green onions, coriander, etc. Due to the large number of insect pests, multi-insect vegetables have to be sprayed frequently for control, and they are bound to become heavily polluted "multi-drug vegetables".

Usually you should choose "less insect vegetables" as much as possible. However, in the cooler season, pesticide spraying stops as pests overwinter, and it is okay to eat small amounts of "multi-insect vegetables". 3. Do not eat vegetables with a large amount of fertilizer due to the large amount of chemical fertilizers, especially the excessive application of nitrogen fertilizers (such as urea, ammonium sulfate, etc.), which will cause serious nitrate pollution in vegetables.

Nitrate itself is not very toxic to humans, but when vegetables enter the gastrointestinal tract, it will be reduced to nitrite acid, which then combines with secondary amines in the gastrointestinal tract to form ammonium nitrite, which is a carcinogen. After the detection of listed vegetables, it was found that the nitrate content of various vegetables varied, and the law from strong to weak was: root vegetables, potatoes, green leafy vegetables, cabbage, onions and garlic, beans, melons, eggplant fruits, edible fungi, and the nitrate content could vary by dozens of times.

The law is that the pollution degree of vegetable roots, stems, and leaves (i.e., vegetative bodies) is much higher than that of flowers, fruits, and seeds (i.e., reproductive bodies), which may be a common protective response in the biological world. This rule is very useful, it can guide us to consume vegetables correctly, eat as many fruits and edible mushrooms as possible, such as cucumbers, tomatoes, edamame, shiitake mushrooms, etc. Fourth, try to eat less off-season vegetables, off-season green beans, peppers, etc., and pesticides are more played.

Although some of the organic produce on the market is not 100% organic, it is relatively safe.

The effective control methods of spotted submarine flies are updated and explained, and the technology is more complete and faster, and the vegetable farmers are quick to collect.

The spotted submarine fly, also known as the ghost painting charm, mainly harms cash crops such as green onions, chrysanthemums, and beans.

Many farmers feedback that the pest has developed resistance, and it is becoming more and more difficult to control.

Spotted loon flies belong to the family of Diptera loons pests, adults and larvae can harm crops, mainly to harm leaves, adults suck leaf sap, female insects lay eggs in the mesophyll, especially melons, green onions and other crops, suffer from the harm of spotted loons, some crop leaves are seriously harmed, affecting photosynthesis.

It has a great impact on the normal growth of crops.

In the past, avermectin was mostly used for the prevention and control of spotted submarine flies.

From the content to 5%, the dose is also increasing, but the effect is getting worse and worse, which indicates that the spotted submarine has developed resistance to avermectin.

Later, it was popular to use the product of fly avenin, in the case of resistance to avermectin, the effect of fly amine is very prominent, farmers and friends are like this, once a certain pesticide product is recognized, it has been used, loyalty, guidance to use it until resistance.

Excuse me, is this true love for this product?

Nowadays, the effect of fly amine is not as good as before, and farmers have begun to use avermectin and fly amine mixture, and in areas with large resistance, they also need to add penetrants, or kill (deltamethrin.

In this way, the highly permeable pyrethroid pesticide can achieve the ideal control effect.

Here, I advise farmers and friends in the area where the resistance has not yet been produced, the prevention and control of the spotted diver fly must be cyclically gradual, not blindly increase the amount of pesticides, and not use a single pesticide for a long time, and the alternating use of two pesticides with different properties is the main means to avoid the resistance of pests.

For example, the pesticides for the prevention and control of spotted divers on the market are still mainly avermectin and fly-killers, once the resistance is generated, there is no other way except to increase the dosage, which is not a good thing for the prevention and control cost, drug residues, and environmental pollution.

The spotted submarine fly, also has a very mysterious name called ghost painting, which mainly harms fruit and vegetable crops, such as cucumbers, tomatoes, etc. In terms of the use of insecticides, the spotted submarine has developed a relatively serious resistance to avermectin, and the current agent is fly amine.

Here are a few ways to do this:

1. The prevention and control strategy and objectives adhere to the plant protection policy of "prevention first, comprehensive prevention and control", and use the combination of agricultural, physical and chemical prevention and control methods to reduce the amount and number of pesticides used, and effectively control the harm of spotted submarine fly.

2. Strengthen quarantine to prevent the spread of pests with the transportation of vegetable products and vegetable seedlings.

3. Cultivate insect-free seedlings. Greenhouse seedlings are the main way for the insect to expand in the coming year, so before seedlings, the seedling shed must be disinfected. 22% dichlorvos smoke agent can be used for fumigation at a dosage of 300-400 grams per mu, and the stubble crops can not be left in the seedbed.

At the same time, the ventilation of the seedbed should be equipped with an insect-proof net to strictly prevent the transplanting of seedlings with insects.

3. Physical prevention and control. The insect likes yellow, and the effect of using a yellow plate to trap is very good. However, the yellow plate must be hung in the correct position.

First, the yellow board should be hung in the greenhouse from the back wall to the front of the shed 2 3 places, and the second is that the height should be consistent with the height of the seedlings, or 10 cm higher. And the yellow board should be taken back to the room in 10-15 days to brush the oil again.

4. Use antibiotics and pesticides. The advantage of antibiotic pesticides is that they are safe for crops and are not prone to resistance. At present, the better pesticide is avermectin (also known as chirmectin, afordin, and insect mite), which has a control effect of more than 85% and an effective period of 20-30 days.

5. Chemical control. The better pesticides are 20% imidacloprid EC 2000 times, 10% imidacloprid wettable powder 1000 times, 48% chlorpyrifos (Lesben) EC 800-1000 times, and pesticides such as fly amine can also be used, pay attention to alternate medication.

6. Eliminate insect pupae. The insect is a pupa outside the leaf, generally will fall on the mulch, it is best to open the shed in the morning after the pupa will be swept together, take out of the shed to destroy.

The larvae of spotted submarine fly are small, fecundity, overlapping generations, adults can fly and migrate, coupled with drug resistance, so the control target is unstable and difficult. Available: Enylthioline, chlorantraniliprole, dinotefuranid.

Because its old larvae are more resistant to pesticides, so to start control at the larval stage, you can use 20% insecticidal aqueous solution 800 times, or you can also use 48% chlorpyrifos emulsifiable concentrate 1000 times solution spray, to ensure carpet spraying, do not let go of every corner.

Older larvae are highly resistant to pesticides, so it is best to start the drug at the larval stage, and you can use 20% insecticidal dihydrate or 90% insecticidal monowettable aqueous agent.

If you want to effectively remove spotted loon flies from greenhouse vegetables, you must take agricultural measures. The so-called agricultural measures refer to the cleaning of the fields, and the dead leaves in the damaged vegetables should be buried intensively and deeply. If you block the worm's **, you can make the death of a few complete the growth of most vegetables.

If you don't take these leaves out of the greenhouse, it will affect other vegetables. When removing these leaves, be sure to wrap them gently and carefully pour the pupae into the ground. Once in the soil, it is possible to survive again.

The vegetable spotted submarine fly is a very small fly with a small black body. The volume is about millimeters, and the smallest is also about millimeters. The larvae are generally not visible until they grow to a pale orange-yellow or orange-yellow color.

It adheres to the flesh of the epidermis until all the leaves are eaten. When it is found that the leaf function is constantly lost, and finally there is a phenomenon of drying, it must be the vegetable spotted loon fly. <

Protected land cultivation of vegetables provides a good wintering place for the vegetable spotted diver to spend the cold winter. This insect must not spend the winter in the greenhouse, otherwise all the vegetables in the shed will become their bag. When planting vegetables in a greenhouse, you should constantly uncover the shed if you want to prevent it before purifying.

They can't touch the outside temperature, so they can be chased away. If you find that there are, you can choose to use fumigation to force them all out. <>

In general, the harm of this insect is relatively large, and it will affect the yield of farmers in the later stage. When you notice whitening on vegetables, don't be careless, it may be a trace left by insects. In the process of planting, the soil must be treated, and well-rotted farm manure must be used.

Fertilizer must be chosen carefully, otherwise it will also attract insects.

It can be removed by spraying drugs, or you can install insect nets, insert yellow cards and hang yellow stripes to trap adult insects.

You can spray some pesticides, which can play a role in prevention and control, which is very effective.

If you want to effectively remove the spotted loon fly from greenhouse vegetables, you should use some special insecticides to effectively remove it.

Based on my experience, I will tell you more about it

Symptoms of the vegetable spotted loon

After the eggs hatch into larvae under the epidermis of the vegetable leaves, they begin to gnaw on the mesophyll tissue of the vegetables, moving forward as they eat, forming a very distinct curved submerged channel on the leaves. In the later stage, the submersible channel is covered with leaves, which makes the leaves lose their basic functions, affects the photosynthesis of leaves, and reduces the yield of vegetables. Eventually, the leaves will dry up and fall off.

Characteristics of the vegetable spotted loon

The adult of the spotted submarine fly is small, and the larvae live in the leaves, so the refusibility is strong, its reproductive ability is strong, and the reproductive cycle is short, so the overlapping phenomenon of generations is serious, and the growth of drug resistance is also block, because the adult can fly, so the diffusion ability is also fast. Therefore, it is of great significance to carry out key prevention and control when the adult flies are in order to reduce the population base of the next bag.

How to prevent the vegetable spotted loon

1.Agricultural control: clean up the dead branches and leaves in the field, take them out of the field and burn them.

It is used to destroy the source of insects. In the early stage of the disease, the insect leaves or the plants with serious disease should be removed in time and taken out of the field for destruction, which can reduce the number of insect populations. At the peak of pupation, the land can be watered and deeply cultivated to destroy the feathering environment of the spotted submarine fly.

It is also possible to turn the ground deep immediately after the vegetable harvest, so that the fly pupae on the ground can be turned into the soil to cover it, so that it cannot be feathered and lay eggs everywhere.

2.Physical control: spotted submarine flies have yellowing, according to this habit in the vegetable field to hang a yellow board to trap adults, the yellow plate should be hung above the vegetable growth point, close to the growth point.

3.Pesticide control: The best time for pesticide control is in the peak stage of the young larvae of spotted pluon.

You can choose 3000 times of Abadin emulsifiable concentrate, or 3000 times of 75% latent gram, or 1000 times of green card for spray control. The above agents should be used in rotation to avoid drug resistance. Spray once every three days, twice in a row.

In a word. Vegetable spotted submarine flies reproduce quickly, and the insect population base is large, so it is necessary to take measures to combine prevention and control. To prevent it, it is necessary to clean the field and destroy it after the harvest of the last vegetables, and then turn the land deeply.

treatment, in the occurrence period of its young larvae, focus on killing with pesticides.

You can apply more fertilizer, water more, spray nutrient solution, you can also spray any poison, and often renovate the soil so that these pests can be removed.

It is necessary to pay attention to watering and fertilization, be sure to pay attention to the use of pesticides, pay attention to light, and can be controlled by some drugs.

The flover spotted diver fly originated in North America (possibly Florida, USA), and was first discovered in Zhongshan City, Guangdong Province in December 2005, which may have been introduced with imported flowers and vegetables. There are more than 300 kinds of host plants, which cause a large number of leaves to fall off, slow plant development, and reduce yield; Reduce the commodity value of flowers, fruits, vegetables and ornamental plants.

Prevention and control methods. 1) Physical controlAfter the crops are harvested, the plants and weeds inside and outside the greenhouse or field are burned intensively, the soil that may be infected by pupae is buried deeply, or the pupa in the soil is eliminated by a combination of polyethylene film mulching and irrigation.

2) Chemical control According to the degree of occurrence and the instructions for use, insecticidal rings, borer, flyin, fipronitr, thiazinone, pyrethuron, deltamethrin, pyrethramine plus cadmium succinate, anti-aphid and other agents are selected for control. Methyl bromide can be fumigated in the greenhouse.

3) Agricultural prevention and control: deep ploughing and soil modification. Intercropping to form a protective belt, such as soybeans in vegetables.