What harm will the peach aphid, which gives farmers a headache, bring to peach trees?

Every spring, the fruit farmers of peach trees may have a headache. This is a peach. Many fruitful friends say that peaches are too difficult to treat, and they can't stop spraying them 2-3 times a year. So today, we will talk about why spring is difficult to prevent and how to prevent it. Is Myzus persicae a preventive therapy in spring? Understand these three skills and teach you how to control aphids easily.

1, the harm of Myzus persicae

Mei Tao is a peach blossom on a peach tree. Although small, it is very harmful. Taohamiga is a traveler, mainly hurting peach leaves, especially Xinbai. After sucking the juice, if the insect colony is absorbed, the leaves will roll and scale, which will seriously affect the photosynthesis of peach trees. At the same time, the discharge of "honey dew" from peach leaves and fruit surfaces will affect the normal photosynthetic function of peach leaves, as well as the development and quality of peach fruits. On the other hand, Aunt Taoyi has certain mobility and is also the smearer of some diseases (such as viral diseases).

2. Causes of prevention and treatment

So why is Myzus persicae a preventive treatment? We will analyze Myzus persicae and its application methods from two aspects.

(1) Life habits of Myzus persicae. Aphids are very fertile and can be born to breed new women. Myzus persicae can spend about 30-40 generations a year, and the temperature is suitable in spring and autumn. From March to April, the weather temperature 15℃ or so, aphids began to breed and do harm.

The reproduction speed of aphids is also affected by temperature. The higher the temperature, the shorter the generation time, so after 4-5 months, aphids will overlap. We see that several aphids on the leaves may be "four generations" and "five generations" together, and different generations of aphids have different drug resistance.

(2) Drug selection and application methods. There are many drugs to control aphids, and the selectivity of farmers' friends is also diverse, but in the prevention and control, these misunderstandings are often encountered:

1 depends on a single agent. After using a drug for the first time, the effect is good after the first time, and the drug resistance will be produced if the drug is still selected for the next prevention;

2 Ignore the mixing of chemicals. After eating peaches, peach aphids will cause peach trees and aphids to hide in the leaves. If they use adhesive, the medicine can't reach the peach, which is also a reason. Is Myzus persicae a preventive therapy in spring? Understand these three skills and teach you how to control aphids easily.

3 Not selected correctly. Many activities of active ingredients are directly related to temperature. The temperature is low in spring, especially in the morning or evening, which may be lower than 10℃ or even lower. Many pharmacists can't completely tolerate this temperature, which is also an important factor that makes the medicine not easy to use.

3. How to effectively control Myzus persicae?

Just as we have analyzed the reasons for controlling peach aphids, we can control these factors.

(1) Prevention and treatment are very important. Be sure to take precautions in advance, because individuals are very small and not easy to find. This is very serious and needs prevention and treatment. Combined with Qingyuan in front of peach trees, prevention can begin; This is the period of aphid concentration and the most critical prevention and control period; If you miss two preventive opportunities, you can take medicine in time after falling. If you don't grasp the key prevention and control, there will be problems, such as peach rolls or peach beads, which are easy to control.

(2) Selection and collocation of drugs. The prevention and control of Myzus persicae must choose genetic agents and viscous agents, or mix them to achieve endogenous and depilatory functions. Pharmaceutically acceptable agents are usually preferred, such as columnar alkyl ester, pyridine, fluorine-free amount, isolated and baited Escherichia coli ketone, fluorocyanide, chloride, high chloroform, avermectin, picroside and so on.

When using, there should be enough and alternative drugs, and the activity of reagents and the efficacy of drugs during the current temperature should be considered to avoid the temperature difference caused by low temperature; If the best control period is delayed, it will lead to more serious pests and more difficult control. When taking medicine, it can also be combined with fungi and foliar fertilizer. , combined with the actual situation.

(3) Methods and preventive measures. When spring peaches are low, if pesticides are diluted directly with well water or tap water, they may not be completely dissolved. Warm water can be used if conditions permit, taking advantage of the solubility characteristics of the liquid medicine. The application time should also be 10 from afternoon to 4 pm. At this time, it is the time period of one day's temperature, which can not only dissolve drugs better, but also have a relatively active time period, which is beneficial to the functional function and the "absorption" of drugs by aphids.