Why do you have to cure the aphids on the leaves?

Aphids. It is also known as oil worm, honey worm, greasy worm, excellent worm, dry worm, etc. There are many species and a high reproduction rate.

The life cycle is complex, and the same species can take different forms in different seasons and environments. More than 2,000 species of aphids have been found in the world, and the host areas harmed by aphids are very common, and honeydew is the excrement of aphids. Transparent and sticky, it is scattered on the branches and leaves under the aphid colony.

The accumulation of these substances clogs the foliar stomata and retards the physiological effects of plants, and honeydew is the medium for many bacteria.

Coal stain disease occurs on the surface of plants, affecting the photosynthesis of plants.

Do you still need to ask about this? Because of the aphids on the leaves of plants, it eats plants. If you don't kill the toothworm, the worm will eat the plant.

If there are a lot of aphids, his house will be very fast, and if you don't treat him, the plant will be eaten by the aphids and die. Then he won't be able to live, for example, if you plant any melons and fruits, vegetables, in the end you can't get them at all, and you can't get these vegetables with these melons and fruits. You've contributed to the toothworms, so what do you gain?

Therefore, it is necessary to treat toothworms. The only way to kill the toothworm is to kill it. In order to make your fruits and vegetables grow well, the same number is the same.

If there are too many tooth worms on the trees. That will also eat your trees into a mess, your trees. It's like getting sick, and it can even lead to death.

Aphids have a very strong reproductive ability and are easy to flood, so they must be dealt with as soon as possible, because if there are more aphids, it may cause some harm to the plant. The main points are as follows:

1. The aphid absorbs a large amount of sap from the plant with a stinging and suction mouthpart, so that the plant grows short, the leaves are curled, the flower buds cannot be opened, and the plant ages and seness prematurely.

2. Aphids can carry viruses and then invade plants from stinging wounds, causing secondary infection.

3. Aphids suck too much plant sap and excrete it from the body, attracting ants, infecting mold, and inducing coal stain disease.

So what should I do if the plant has aphids?

1. If there are aphids on the leaves of the plant, you can soak the smoked cigarette holder in water, wait for the water to turn yellow, and then put it into the watering can, and then spray it on the plant with aphids, you can eliminate the aphids.

2. You can also add an appropriate amount of water to the chili noodles, put the chili water into the watering can, and spray the aphid leaves with the watering can, which can also eliminate the aphids on the leaves.

3. You can also pour soapy water into the watering can, and then spray it on the leaves with aphids, so that you can get rid of aphids by spraying two or three times.

4. If the aphids on the leaves are more serious, you can use pesticides to remove aphids for spraying, which can also remove aphids well.

However, in the process of using pesticides, it is necessary to pay attention to the appropriate amount of spraying, so as not to cause harm to plants and pollution to the environment.

The harm of aphids to flowers or plants is roughly in two aspects, the first aphid is a stinging and sucking pest, which can suck the juice of plants, that is, the nutrients absorbed by plant roots, are sucked by aphids, just like mosquitoes suck human blood, aphids suck the blood of plants, if a large number of aphids gather on plants, almost all the nutrients absorbed by plant roots can be sucked away, and finally cause the death of plants, and the second point, the tail of aphids will secrete some honeydew, this thing is the favorite of ants, just like honey, Therefore, the aphid is willing to be a bodyguard for the aphid, of course, it can also be understood that the aphid is raised by ants, that is, like people grazing cows, ants grazing aphids, and even aphids in many places, are moved by ants. If the number of aphids is huge, the ants can't eat the honeydew for a while, and the honeydew falls on the leaves of the plant, causing moldy hair, on the one hand, blocking the sunlight, the leaves can not photosynthesize, and secondly, it is easy to cause the occurrence of gray mold, and the plant will wilt and die.

In addition to spraying some drugs to kill aphids, usually plant flowers, in the season of high incidence of aphids, you can also regularly water some imidacloprid, small white medicine or something into the flower pot, so that the plant will absorb the drug into the body, aphids suck plant juice, will be poisoned, but also has a certain degree of preventive effect.

It is harmful to the young shoots and young leaves of the back of vegetable leaves or the remaining seeds, resulting in shortening and bending of the internodes, and the deformity and curling of the young leaves downward, which makes the plant dwarf, affects the core or balls, and causes the yield to be reduced; The left-behind vegetables are damaged and cannot sprout, flower, and set seeds normally. At the same time, viral diseases are transmitted, causing far more harm than the aphid itself.

There are aphids on plants, and the leaves and branches need to be cut off in time and burned in a concentrated manner to cut off the source of infection. If there are a small number of aphids on the branches and leaves of the plant, you can spray the plant with soapy water or pepper water to remove the insects. If there are a large number of aphids on the branches and leaves of the plant, the plant can be sprayed with chemical agents such as grassworm forest, anti-aphid or acetamiprid to remove insects.

** method of aphids on plants.

Aphids generally occur in spring or summer, and if the growth of plants is too poor and the growth environment is not suitable, they will be attacked by aphids. There are aphids on the stems or leaves of plants, and the leaves and branches need to be cut off, and there is a concentrated burning after cutting. If there are fewer aphids on the branches and leaves of the plant, you can spray the plant with soapy water, pepper water or pepper water.

If there are a large number of aphids on the branches and leaves of the plant, after cutting off the branches and leaves, you can spray the plant with chemicals to remove the insects. To get rid of aphids, you can use chemicals such as worm forests, anti-aphid or acetamiprid. A variety of pesticides are used alternately, and the effect of insect control is better, but it is necessary to pay attention to the concentration of pesticides should not be too high.

Dilute the agent with water according to the instructions, and after dilution, you can spray the branches, leaves, stems, soil and pots of the plant, and spray carefully. During the spraying period, it is necessary to pay attention to the fact that the agent should not be stopped halfway, otherwise the efficacy of the drug will be affected. After spraying the plant, do not put it in a sunny location, the light will also affect the efficacy of the drug, which is not conducive to the recovery of the plant.

After diluting the agent with water, the plant can be sprayed once between 7 and 10 days, and after spraying 3 or 4 times in a row, the pest can be removed. After the plant recovers in the later stage, it is necessary to give the plant sufficient light, water and fertilizer, which can improve the disease resistance of the plant. During the maintenance period, the plant should be sprayed regularly, and it can be sprayed once between 20 and 30 days to prevent pests and diseases.

The gourd grower did not understand the close connection between the leaves and the gourd, so he didn't care if there were aphids on the leaves, and he didn't listen to the neighbors' persuasions. Since Chenhongna did not implement measures, there were more and more aphids on the leaves, resulting in the gourds falling and finally not getting the gourds.

From the text. The reasons can be seen in the third and fourth natural paragraphs:

A neighbor saw it and said to him, "Don't just stare at the gourd, the leaf pie has an aphid, cure it!" The man felt very strange and said, "What?".Do you still need to treat the insects on the leaves? I want a gourd. ”

The reason why aphids are difficult to control is that they are highly fecundity and easy to develop resistance.

First, strong fecundity

Aphids are the fastest reproducing insects in the world, with very strong reproductive ability and no restrictions, and can reproduce 10-30 generations a year, and the overlapping phenomenon of generations is very prominent. Female aphids will reproduce at birth, and the aphids that are removed from the fertility can give birth immediately, and the aphids are still parthenogenesis, omitting a lot of reproductive links, which is also the reason why it is difficult to control.

Second, it is easy to develop drug resistance

Aphids are very resistant to pesticides, at present, some of the pesticides we commonly use to control aphids, aphids have basically had a certain resistance, we can only continue to increase the content of active ingredients in the agents, or take a compound to enhance the effect.

Aphid control methods

1. Agricultural prevention

Aphids are parasitic on peach trees and other fruit trees, with fertilized eggs to overwinter, hatching in spring, so in order to better prevent aphids, winter and spring should do a good job of clearing the garden. The garden can be cleared with 3-5 Baumé stone sulfur mixture before spring germination, which can effectively reduce the number of aphids in the early envy stage and reduce the damage of aphids in the flowering stage.

2. Chemical control

Aphids harm many fruit trees, such as peach tree control, the agent can be used 70 imidacin water dispersible granules 3000 or 20 matrine wettable powder 3000 times, or avi high chlorine 2000 times agricultural resistance 1000 times.

or 20 pymetrozine wettable powder 3000 times liquid, or 10 enenyldime wettable powder 2000 times liquid and other agent spray control. Focus on spraying the back of the leaves of fruit trees, because most of the aphids are concentrated on the back of the leaves, so that the agent can directly contact the aphids to provide an insecticidal effect.