Do you know when it is best to fight aphids?

3 May can be carried out, March is the spring of the recovery of all things, then for these insects also begin to wake up actively, bringing damage to crops, so it is best to fight these insects in spring. If you don't hit in this season, then our crops will be seriously harmed, which will directly affect the growth of these crops, so for some growers at this time do not carry out insecticide, and they will find it more and more difficult to treat in the later stage, after all, they will definitely lay eggs before it lays eggs, so it is more convenient. <>

When choosing pesticides to kill these insects, we must choose a good time, such as in the evening, then it is the best, after all, if you go to spray pesticides in the morning, it will lead to pesticide evaporation at noon, because the sun comes out at noon, the temperature will rise directly affect the effect of pesticides, if the choice is in the evening, then in the evening this stage will rarely lead to pesticide evaporation, so the evening will be able to keep the pesticide for a longer time. <>

Of course, don't choose to spray pesticides in rainy weather, as soon as it rains, the effect of the pesticides we spray will be greatly reduced, which must be paid attention to, otherwise it will be in vain.

When we treat people, we have always followed the principle of early detection and early detection, in fact, the same is true for insect fighting. When we find that there are these insects on the crop, we should disperse them in time, whether it is two or three, one or two, because once there is, it will not take many days to lead to the expansion of the range, and it will be more difficult to prevent and control at that time, so if we find that there are insects, we should use pesticides to kill them in time. <>

Wait until a week later to add a supplement, so that it will be more thorough, the first time to kill can not completely pass these to the surface, but also need to carry out a second supplement, the second time to kill will be more thorough, the effect will be a little better.

I know that after the rain, it is best to fight aphids, because there is a lot of water at this time, and the bugs are not easy to hang on, especially easy to remove.

When the seedlings are about to bloom and bear fruit after they grow, they should be treated with insect borers, because in this way they can be fundamentally solved and avoided.

I think it's best to fight aphids in the summer, because it's very vulnerable.

It should be when the eggs have just been laid and the bugs have not crawled out, it may be the best to fight, and at this time you only need to sprinkle some pesticides.

It should be mid-April or late September. Both of these times are very appropriate and the best times.

Specific operation: the time is in the early stage of aphid occurrence; The agent is a systemic agent that is safe for apricot trees, such as 40% dimethoate EC or 50% monocrotophos, mixed with about 30 times of water; Small trees can be smeared directly on the trunk. Large trees can be about 50 centimeters high from the ground, after the bud to before the flower spray 10% of the lice aphid, 3000-5000 times liquid to control peach aphid and mealy aphid.

In late April, spray 10% of the aphid to control the aphid. Spray 40% imidacloprid aqueous solvent, 1500-2000 times liquid or 50% anti-aphid wettable powder, 3000 times liquid during the large period. The opposite color, after the summer, it turns into light yellow-green, and in the autumn it becomes brown or russet, the eyes become red, the aphids on the apricot tree are widely distributed, and the tree species that harm are more, in addition to harming the apricot tree, it reaches the peak when the peach tree, plum tree, plum tree, etc., the ovitarization ends after the flower opens, after the apricot tree develops the leaves, the adult or small nymph swarm behind the leaf harms, the back of the damaged leaf shrinks, excretes mucus, pollutes the branches, and tobacco mildew occurs on the leaf surface.

And continue parthenogenetic breeding, May is the most serious, the reproduction is also the fastest, until May 3000-5000 times liquid to control peach aphid or mealy aphid; In late April, spray 10% of the aphid to control the aphid. In the large occurrence period, spray 2000-3000 times the net of one time. 2. Boil boiling water with peppercorns, cool and spray on the tree, which can prevent and kill aphids on the tree. Apricot orchard.

Many fruit farmers spend a lot of effort to deal with aphids every year, but the effect is not good, so you must not take it lightly at present, otherwise, it is very likely that your later expenses will increase.

The best way is to spray for prevention, if the leaves have been rolled, it is recommended to spray acetamiprid and other nutrients with internal white matter, calcium, phosphorus, vitamin A, vitamin CB and so on. In summer and autumn, apricot trees are most susceptible to aphid damage, which are widely distributed, reproduce quickly, and have a long damage cycle, which seriously affects the yield and quality of apricot trees. So how do we get rid of aphids?

Let's take a look.

Aphid is an important pest that harms grain, cotton, oil, hemp, tea, sugar, vegetables, tobacco, fruit, medicine and trees and other economic plants, the appropriate time to control aphids is from mid-April to late September, the agent has acetamiprid, imidacloprid, etc., generally every 10g of agent can be mixed with 7-10kg of water, and then spray control.

Try to choose the evening time, when all the aphids have appeared, and you can catch them all.

The suitable time for prevention and control is from mid-April to late September, the agents are acetamiprid and imidacloprid, etc., generally every 10 grams of pesticides can be mixed with 7-10 kg of water, and then spray control.

When removing aphids, you can use the method of drug control, you need to spray the plant 1-2 times every other week with insecticides to eliminate the pests on the plant, and you can use the method of manual control, you need to brush the base of the tree with whitening agent, and cut off the infected branches and leaves of the plant and burn them, so as not to cause serious problems.

1. Drug prevention and treatment.

If you want to completely get rid of aphids, you need to spray pesticides on the plants in time, you can spray insecticides 1-2 times every other week to eliminate pests on the branches and leaves of the plants and make them grow healthily, or mix washing powder, urea and water in a ratio of 1:20:400, and then spray them on the leaves of the plants, which is conducive to killing aphids.

2. Artificial prevention and control.

To remove aphids, you can use manual control methods, which need to use quicklime, sulfur powder and water to mix to make a whitening agent, and then apply it to the trunk of the tree, so as to prevent the aphids from crawling into the bark to lay eggs, and can cut off all the branches and leaves infected with the disease of the plant and burn them to maintain the normal growth of the plant.

3. Replace the soil.

Aphids will lay eggs in the soil, when raising potted plants, you need to change the potting soil immediately after the plant is infected with aphids, you can use loose and breathable sandy loam rich in humus, and then spray the soil with potassium permanganate solution to disinfect and promote the vigorous growth of plants.

4. Protect natural enemies.

There are many natural enemies of aphids, there are ladybugs, aphid lions, parasitic wasps, aphid flies, etc., if you want to get rid of aphids, you can put natural enemies around the plant, and protect the environment, so that natural enemies can prey on aphids freely, and aphids will die because of the change of weather, rainfall will prevent the migration of aphids and shoot them down from plants.

The relatively simple and crude method is to directly use some strong water to wash away the aphids, which is more suitable for some more robust plants. It is even possible to flush potted plants directly under the tap to flush away aphids, but this method is not suitable for some plants that are fragile or small. Neem oil is an organic insecticide similar to soapy water, it can be used well against aphids, whiteflies, scale insects, beetles, caterpillars and ants, etc., it can deal with a variety of pests, but it does little harm to beneficial insects.

There are several ways to kill aphids: first, use acetamiprid and imidacloprid into a potion, and spray it in a small pot where there are many aphids, which is harmless to plants. The second is to light a mosquito coil and hang it on the plant, then wrap the whole plant in a plastic bag, and the aphids can be eliminated in about 10 minutes.

The third is to spray liquor above 45 degrees directly with a small sprayer, once a day in the morning and evening, for 3 consecutive days. Fourth, spraying soot with water on plants can eliminate aphids.

You can use some soapy water directly, then mix it with water 50 times, and then spray it on the plant, taking care to spray the back of the leaves evenly as well, as aphids usually hide under the leaves.

Use 5 grams of cigarette butts mixed with water grams, soak for 24 hours, rub them slightly, filter out the dregs with gauze, and then water the flowers with water, which will soon remove aphids. Generally speaking, about ten cigarette butts can be equipped with a mineral water bottle.

Summary. The temperature that is more suitable for spraying pesticides is 10 -30 °C, within this temperature range, the higher the temperature, the better the effect of spraying. When the temperature is at 24°C-25°C, the application effect is the best.

Wait a minute, pro.

It is more suitable for the temperature of the pesticide to be 10 -30 °C, within this temperature range, the higher the temperature, the better the effect of the fighting drug. When the temperature is at 24°C-25°C, the application effect is the best.

1. The temperature is high in summer, and the spraying time is generally before 10 o'clock in the morning or after 4 o'clock in the afternoon; 2. The weather is cool in spring and autumn season, and the time for spraying limbs can be arranged after 10 a.m. or before 2 p.m.; 3. When planting crops in greenhouses, it is advisable to choose to apply pesticides in the morning in warm and sunny weather in winter and spring.

The temperature is too high at noon, the pesticide evaporation and diffusion is fast, and the pesticide concentration in the air is higher than usual, which increases the risk of pesticide poisoning.

The three most feared drugs for aphids are nicotinic aphid control agents, pyridinamide insecticides, and the latest anti-aphid agents.

1. Nicotinic aphid control agents.

Nicotinic insecticides are the most common insecticides for the control of aphids, and its typical generation Sakuramori has imidacloprid, acetamiprid, thiamethoxam, etc., this kind of insecticide ** is not high, has systemic and contact killing effects, because it is listed earlier, and the resistance is obvious. At present, it is mainly used to control general resistant aphids, and highly resistant aphids such as peach aphids, yellow aphids, etc., and the effect is not obvious.

2. Pyridinamide insecticides.

Pyridinamide insecticides are currently one of the special agents for resistant aphids, and the typical representative is flufenamide, which is definitely a good hand for the prevention and control of resistant aphids, and is currently the most used ingredient for resistant aphids, but the cost is high.

3. The latest anti-aphid agent.

The third type of aphid insecticide can be said to be the latest and hottest one on the market. Its chemical ingredient is called dipropionate, which is a new, non-resistant agent produced by BASF in Germany. The insecticidal mechanism of this insecticide mainly relies on interfering with the normal nerve transmission carried by the pest's spine, making its movement unbalanced, refusing to eat, and then causing the aphids to die.

Natural enemies of aphids

Aphid-eating flies: Aphid-eating flies are effective natural enemies of aphids, scale insects, whiteflies, leafhoppers, thrips, etc., and are known for their larvae preying on aphids.

Ladybug: Ladybug is the common name of the beetle with round protrusions in the family Coleoptera ladybugidae, often with red, black or yellow spots, and predatory ladybugs mostly feed on aphids. Many ladybugs live only in specific habitats, sometimes limited to a few plants in a particular habitat.

Parasitic wasps: parasitic bees refer to a variety of insects that live by parasitism, such as the family of golden bees, the family of agabees, and the family of small bees, of the order Hymenoptera, and there are many species, which are parasitic on the different developmental stages of the host, and the common ones are small wasps, bumble bees, cocoon bees, red-eyed bees, rodent wasps, etc.

The best way is to spray with pesticides, because from the current point of view, pharmaceutical solvents can actually achieve a very good effect. There are many harms of this insect, such as affecting the harvest of this plant, affecting its aesthetics, and thus affecting our actual income.

There are ways to kill aphids:

Light the mosquito coil and hang it on the plant, then wrap the whole plant in a plastic bag, and the aphids can be eliminated in about 10 minutes;

From the point of view of the "natural enemy" of aphids, the most well-known in the countryside is the "seven-star ladybug", which can be dealt with by natural enemies;

Use acetamiprid and imidacloprid to mix into a potion, and spray it in a small pot where there are many aphids, which is harmless to plants.

Hazards of aphids: As important carriers of viruses, aphids can easily transmit various viruses to chrysanthemums and spread viruses between different plants.

The way to do this is to use some pesticides. It can lead to damage to crops, it can also lead to lower yields, it can lead to some diseases, and it can cause some problems with crops.

Marathon emulsion, pine borer emulsion to kill aphids.

Aphid control methods:

1.Pharmacological prevention.

When a large number of aphids are found, spray pesticides in time. Spray plants 1 to 2 times with 50% marathon emulsion 1000 times, or 50% pyridoxine emulsion 1000 times, or 50% anti-aphid wettable powder 3000 times, or deltamethrin emulsion 3000 times, or 3000 times of dissol emulsion, or 1500 to 2000 times of 40% imidacloprid aqueous solvent; Use 1:6 to 1:

Prepare chilli water in a ratio of 8 (boil for about half an hour), or spray with laundry detergent water in a ratio of 1:20 to 1:30, or use 1:

20:400 ratio of laundry detergent, urea, water mixed solution spraying, continuous spraying of plants 2 to 3 times; For aphids such as peach flour aphid, which are covered with wax powder, 1% soapy water or washing powder should be added when applying any agent to increase adhesion and improve the control effect.

2.Artificial control.

In autumn and winter, whitewash the base of the trunk to prevent aphids from laying eggs; Combined with pruning, the damaged branches and residual flowers were cut off, and burned intensively to reduce the overwintering insect population; In winter, scrape or brush off the densely overwintering egg masses on the bark, clean up the residual branches and leaves in time, and reduce the eggs of overwintering insects; When a small number of aphids are found on the flowers in spring, you can use a brush dipped in water to brush them off, or place the potted flowers under tap water and rinse them in a swirling way.

3.Protect predators.

There are many natural enemies of aphids, such as ladybugs, dust lacewings, aphid flies and parasitic wasps, etc., which have a strong inhibitory effect on aphids. Try to apply as little broad-spectrum pesticides as possible, avoid applying pesticides during the peak period of natural enemy activities, and artificially raise and release aphid natural enemies if conditions permit.