How to control aphids? How to control aphids?

Aphids, also known as vegetable aphids, greasy insects, etc., including peach aphids, radish aphids and cabbage aphids, are one of the main pests of cruciferous vegetables such as cabbage.

Use silver gray film to avoid aphids. Pharmaceutical prevention and control: Commonly used agents are:

50% aphid-asciopy fog wettable powder or anti-aphid carb wettable powder, 10 18 grams per mu, spray 30 50 kg of water. This agent is specially designed to control aphids, does not kill natural enemies and bees, and is especially suitable for harvesting fields. Once net or 10% imidacloprid wettable powder, the dosage per mu is 5 10 grams to 100 kg of water.

Generally, it reproduces rapidly in cloudy and foggy weather, mainly harming leaves, young trees and flower buds, causing leaves and flower buds to shrink and stop growing, resulting in reduced yield.

Prevention and control methods. Spray once every 7 days with 2000 times of 40% dimethoate emulsion, basically eliminate aphids for 2 consecutive times, and pay attention to the back of the leaves when spraying.

Spraying prevention and control is the most commonly used prevention and control method at present, with fast effect and high efficiency.

However, the duration of the general agent is only 7 15 days, after the effective period, the adults who migrate from elsewhere quickly carry out parthenogenetic reproduction under suitable environmental conditions, and the number of aphids increases geometrically, so in order to control its harm, it has to be sprayed again, generally every 7 days to spray once, I don't know how many times I need to spray in a season, which is why it is difficult for aphids to completely **.

You can also use willow branches to trap aphids. Aphids have a strong tropism to the smell emitted by willow, and a certain amount of willow branches can be tied into a handful and placed in the plant place where aphids occur in large quantities, so that a large number of aphids can be lured together to facilitate centralized killing.

Use plant ash liquid to avoid aphids, use 10 kg of plant ash, soak in 50 kg of water for 24 hours and then filter out, add 25 grams of 80% crystal trichlorfon in the filtrate (can also not be added), mix and spray, can control aphids, cabbage insects and other pests. Spray 1 time every 7 8 days, 3 times in a row, the effect is good.

Prevention and control time and method:

The main activity of aphids is from mid-April to late September, and house plants are produced from May to June. The medicine is recommended to be a low-toxicity and environmentally friendly preparation-based, such as acetamiprid, imidacloprid (generally sold in agricultural stores) is generally about 10 grams per pack, and the price ranges from 5 jiao to 1 yuan.

Usage and Dosage:

It is recommended that 10 grams of medicine per sachet can be mixed with 7---10kg of water, and use a small watering can to focus on spraying the growth point of the plant and the gathering place of the pests, and the amount of the pest can be appropriately increased or decreased according to the number of pests, these agents are harmless to the plant, please feel free to use.

Precautions: Generally, aphids and planthoppers will be on the back of the plant, please be careful. Don't wait until there are too many pests.

How to control aphids in vegetable seedlings

Rapeseed aphid is the main insect pest of rapeseed, which can occur throughout the growth period, with adult aphids and aphids dense on the back of rape leaves, stems and flowers, stinging and sucking sap, destroying mesophyll and chlorophyll to cause leaf curling and dead seedlings. At the same time, aphids are also important vectors for the transmission of rapeseed virus diseases. If the control is not effective, it will lead to a reduction in rapeseed production.

Control measures: select rapeseed varieties with strong stress resistance and good comprehensive traits, and mix 20 grams of 10% imidacloprid with 500 times of new high-fat film for every 1 kg of rapeseed before sowing to control aphids at the seedling stage.

Sow seeds at the right time. According to the climatic conditions, variety characteristics, and the occurrence of aphids, sow seeds in a timely manner, and spray a new high-fat film 800 times liquid to keep warm and moisture after sowing to prevent soil splintering and improve the seedling emergence rate.

Strengthen field management. In the rape seedling stage, weeds should be removed from the field and nearby, combined with seedlings or transplanting, and aphid plants should be removed. Apply an insecticide once before transplanting.

After transplanting, spray the new high-lipid film to improve plant immunity and shield the olfactory sensing ability of pests. Cultivate the soil in time and cultivate strong seedlings. Reasonable dense planting to improve ventilation and light transmittance.

Heavy application of basal fertilizer, phosphorus and potassium fertilizer can make rapeseed grow robust, the stalk is hard, and the ability of rapeseed to resist disease and stress is enhanced.

In winter, dimethoate is sprayed to eliminate aphids on overwintering hosts and reduce the source of insects.

In daily life, you can use 50 grams of fresh chili pepper or dried red pepper, add 30 to 50 grams of water, boil for about half an hour, and sprinkle the affected plants with its filtrate to have special effects.

Or use 3 to 4 grams of washing powder, add 100 grams of water, stir into a solution and spray 2 to 3 times continuously, the prevention and control effect is up to 100. With "Wind Oil Essence R1; Add 600 to 800 times the solution of water and spray the pest carefully with a sprayer to stain the insect body with the potion. The effect of killing aphids and scale insects and other pests is above 95, and there will be no pesticide damage to plants.

Washing powder, urea and water can also be stirred into a mixture in a ratio of 1:4:100 and then used to spray the plants, which can receive the effect of insecticide and fertilization.

Chemical control can be timely sprayed with 50 aphid mist ultra-fine wettable powder 2000 times liquid or 20 methocarb emulsifiable concentrate 1500 times, 50 aphid pine emulsifiable concentrate 1000 1500 times liquid, 50 octathion emulsifiable concentrate 2000 times liquid, 80 dichlorvos emulsifiable concentrate 1000 times liquid.

Use aphid net or imidacloprid, non-toxic package 5 dimes plus 3o catties of water to spray.

There are many chemical drugs and small home remedies, and Metarhizium aeruginosa with a content of 500 million grams or more can be treated.

1. Use the natural enemies of aphids to control aphids: such as ladybugs, small flower bugs, aphid-eating flies, aphid cocoon wasps, lacewings, aphid peaks, etc. are the natural enemies of aphids, and aphid damage can be controlled through introduction, reproduction and other measures.

2. Use the armyworm yellow board to hunt and kill aphids: the armyworm yellow board is placed in the greenhouse or next to the farmland, which can trap and kill a certain amount of winged aphids.

3. Silver-gray has a strong avoidance of aphids, and silver-gray plastic strips can be hung in the garden or silver-gray mulch film can be used to avoid aphids. This method has a good effect on the migratory transmission of aphids.

Aphids: Aphids are highly adaptable and cause damage to many flowers. It mainly sucks the stems and leaves of flowers, especially the young parts, and even on the buds of flowers, aphids are sometimes seen.

There are many methods of aphid control, such as protecting ladybugs, lacewings and other natural enemies, casting fungi, artificial trapping and other biological control methods, removing dead branches and weeds and other pests and diseases, breeding and promoting resistant varieties, applying pesticides, etc., the best way is to adapt measures to local conditions, comprehensive control.

Early spring is the best time to control aphids. It can be sprayed with 2000 times of 50 aphid mist ultra-fine wettable powder or 1500 times of 20 methocarb EC, 1000 1500 times of 50 aphid pine EC, 2000 times of 50 octathion EC, and 1000 times of 80 dichlorvos EC to spray the affected parts; It can also be controlled by soil method.

For example: (1) Garlic juice, onion juice, pepper and orange peel juice can be used. Cut the plants into small pieces, place a teaspoon of chopped shallots or half a teaspoon of mashed garlic in a glass of water for a day and night, then water and brush several times.

2) Crush 50 70g of bitter pepper, boil it in water for 1 hour, cool it for a day and night, filter it, and store it in a glass bottle with a hair sand stopper. Before use, add 8 10g of pepper stock solution and 4g of laundry soap to 1L of water, mix and stir well to spray and scrub the plants.

3) Use 1000g peel (orange, citrus, lemon), add 3L of water after crushing by a crusher, put it in a glass bottle and cover it tightly, store it in a warm and shady place for 5 days and nights, stir it well and filter it with gauze, and the obtained stock solution is quickly packed into a bottle, covered with a stopper, sealed with paraffin, and stored in a cool and shady place. When spraying, add 25g of water to the stock solution and 10g of laundry soap and stir well, and the aphids can be eliminated after 10 days.

4) Soak 200g of yellow tobacco leaves in 5L of water for a day and night, then boil for 2 hours and filter to form the original solution. Dilute with a mixing ratio of 1 to 1 before use, and add 200g of soap to mix in 5L of diluted cigarette liquid.

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As a result, the natural enemies of aphids are not only ladybugs, but also the above phytochemicals and chemical products, Hubei is no exception, there are aphid disasters, ecological alone is irreparable, must be with the help of agricultural technology!

The preparation ratio of laundry detergent, urea and water is 1:3:300.

To prepare, dissolve the laundry detergent with hot water, then add urea and water, and stir well. Foliar spraying is carried out after 125 grams of urea kilogram and neutral laundry detergent per mu are fully dissolved with 50 60 kg of water.

It can control aphids, red spiders, cabbage insects and other pests on grain, cotton, vegetables, fruit trees and other crops. Spray once every 7-8 days, spray 3 times in a row, the control effect can reach about 95%, and it also plays a role in top dressing.

Precautions: Stir fully when preparation, and do not leave particles, which are easy to cause leaf burning. Spraying should be even, be sure to spray the liquid on the aphids, otherwise it will not work.

25 ml of 80% dichlorvos per mu, kilogram of urea, 50 kg of water is added and mixed evenly, and foliar spraying is carried out, which has a strong quick killing effect on chewing mouthparts pests and stinging and sucking mouthparts pests on vegetables, fruit trees, grains, cotton, tea, flowers and other crops.

The control effect of aphids, red spiders, cabbage worms, bridge-building insects, whiteflies and peach insects is as high as 95%. Prevention and control every 6-7 days, continuous prevention and control 3 times, can save 50% of pesticides, and can increase crop yield by about 10%.

Because dichlorvos is harmful to sorghum, it cannot be used; It is sensitive to melons and beans, so it should be used with caution. Online articles, if necessary, may be tested in a small area, and after the effect or success, it can be used in a large area. If you want to break the game, you must advance first, and it should be said that this kind of people dare to be the first in the world.

The method of control of aphids is agricultural control.

Remove weeds and debris in a timely manner. Combined with seedlings to remove insect seedlings; After the vegetables are harvested, the weeds at the edge of the field should be treated in time to remove the residual branches and leaves, so that some aphids can be eliminated. For cultivators in greenhouses and other facilities, the remaining stems and leaves in the shed should be treated in time after the vegetable harvest, and brought to the outside of the shed to be burned, so that the shed can be cleaned so that it can not oversummer and winter.

There are many kinds of aphids, a wide range of hosts, and fast reproduction, and the main ones that are harmful to nightshade vegetables are peach aphids and radish aphids. Adult aphids and aphids are harmed by sucking sap on leaves, young stems, young shoots or peduncles. Seedlings are damaged, the plant grows slowly, the leaves shrink, and dies; The adult plant stage is damaged, and the leaves shrink, affecting flowering and fruiting.

Aphids only take sap through their mouthparts and cause direct damage, and they can spread the virus, causing even more serious damage.

The harm of aphids

Aphids infest different plants with different performances, vegetable aphids mainly appear on the back of vegetable leaves or young leaves, so that the leaves appear curled, deformed, the whole plant is small, if it is a bulb vegetable, it will affect its core, so as to reduce the phenomenon of loss and yield. If the vegetables are attacked by aphids, they will not produce seeds or flowers, and in addition, they will spread viral diseases.

The harm of wheat aphid mainly includes indirect and direct aspects, and the indirect harm is mainly caused by aphids in the harm of wheat at the same time, and the transmission of wheat virus disease, which brings greater harm, and may appear lodging and yield reduction; The direct damage is that the aphids absorb the sap on the wheat stalks, leaves, and tender wheat ears to form certain dead spots, which affects the quality and yield of wheat.