What are the advantages of biopesticides? What do I need to pay attention to when using it?

Pesticides are often used in rural areas, especially when farmers fertilize and kill pesticides for their own fills or fruit trees, pesticides will generally choose biological pesticides, biological pesticides must have its advantages, and the advantages are still very large, just say that we must pay attention to the following aspects when using biological pesticides, here I will talk to you.

1. Biological pesticides.

Biological pesticides refer to the use of living organisms, such as fungi, bacteria, insects, viruses and other or their metabolites, such as pheromone auxin and other preparations for killing or inhibiting agricultural pests, biological pesticides are also known as natural pesticides, natural pesticides are non-chemical synthesis, from natural chemicals and living organisms also have the role of bactericidal pesticides and insecticidal pesticides, pesticides include severe pathogenic nematodes, bacteria and viruses and other microorganisms, plant derivatives and insect pheromones.

Second, the advantages of biological pesticides.

Biological pesticides have many advantages, it is essentially different from chemical pesticides, biological pesticides are selective and safe for humans and animals, and the impact of this pesticide on the ecological environment is very small, especially to induce pests, the probability of disease is very low, and it inhibits the transmission of toxins very well, and can also use the production and processing of agricultural and sideline products to improve yield, which is a relatively large role of biological pesticides, of course, there are some advantages, that is, strong selectivity, relatively low residues, Moreover, the efficiency is relatively high, and it is not easy to produce some resistant components.

3. Precautions for biological pesticides.

For the effectiveness of biological pesticides, the first thing is to pay attention to the temperature of biological pesticides, we must grasp the timely spraying prevention and control effect, some farmers buy pesticides, may be placed for a long time to use, this is not possible, but also to grasp the humidity of pesticides, choose the time to spray, to ensure that the prevention and control of the first to avoid strong light irradiation, to give full play to the efficacy of the drug, but also to avoid heavy rain washing, to use the drug at the right time, to ensure insecticide.

It is very safe, can be applied to a lot of viruses, has a very wide range of use, has a strong effect on insect pests, and can protect a lot of crops. Pay attention to the dosage used, also pay attention to the method of use, but also pay attention to the temperature, but also pay attention to the situation of use, and understand the composition of biopesticides.

First of all, the effect of insecticide and sterilization is relatively good, but it will not cause particularly serious damage to the soil, and then it will not pollute crops, the effect is relatively good, we must pay attention to the concentration when using, and we should also choose to use it on sunny days.

It can avoid pesticide damage, can grasp the temperature, the range of use is very wide, the harm to humans is very small, and it will not be easily poisoned, we must grasp the time of spraying, it is best to avoid the time when the light is strong, but also to prevent being washed by heavy rain, but also to grasp the concentration of spraying.

The advantage is that the security is relatively high, the effect is also very good, ** is also very preferential, and the cost performance is very high. When using, you must take personal precautions, avoid contact**, and avoid rainy or windy weather when using, and you should choose to use pesticides on sunny days, so as to improve the effect.

With the rapid development of the pesticide industry, the shortcomings of chemical pesticides are becoming more and more prominent. Compared with chemical pesticides, biopesticides have obvious advantages in some aspects and are sought after by people. What are the disadvantages of biopesticides?

Biopesticides are generally only effective against one pest and not against others. The temperature and humidity requirements are high, and the suitable temperature of microbial pesticides is 15-30. It is sensitive to ultraviolet light and has a lethal killing effect on microbial pesticides.

It is a slow effect, pests and diseases will not take effect immediately after use, and the application time should be 2-3 days earlier than that of chemical pesticides.

Chemical pesticides mostly use chemical synthetics and harmful chemical additives to treat pesticides, while microbial pesticides use biological pesticides. In the process of microbial pesticide treatment, pathogenic bacteria are in an inhibited state, while microbial pesticides are in an active state, which has a great impact on the control effect of biological pesticides. In order to avoid the toxicity, residue and pesticide pollution and safety of microbial pesticides, we should try to choose safe, efficient, low-toxicity, low-residue, and non-secondary pollution of agricultural microbial preparations.

In the process of preparation processing, it should be carried out in strict accordance with the standard requirements, and fungicides, disinfectants and driers should be added at the same time to avoid pesticide damage and improve the efficacy of the preparation as much as possible. Microbial pesticides can be used for a variety of crops, mainly crop diseases and weeds, generally for the damage effect of good, safe crops, can be used to control more than one year of heavy stubble or geographical location of heavy crops, this kind of pesticides are characterized by a variety of organisms are non-toxic and harmless, and have a strong effective period, but due to the use of a large dose, not suitable for the use of obvious symptoms of pests and diseases.

Therefore, when using microbial pesticides to control pests and diseases, the following issues should be noted: The dosage should be reduced as much as possible, and too much dosage is easy to produce too fast or toxic effect; Too much dosage is easy to cause drug damage; If the dosage is too small, it will reduce the efficacy of the drug. The dosage of pesticides and crop types should be strictly controlled, and appropriate pesticide application equipment should be used; When applying pesticides, the number and time of application should be reduced as much as possible to avoid pesticide damage.

It will be affected by external factors, it will also affect the efficacy, the cost will be relatively high, this pesticide is unstable, and it will be very difficult to use.

The active ingredients of pesticides are very complex, very difficult to control, and not very stable, the shelf life is relatively short, the impact on crops is relatively large, and the effect of control is relatively slow.

Biopesticides are a broad-spectrum, highly effective and safe insecticide.

It can not only effectively control a variety of insect pests, but also do not harm people, livestock and poultry.

1. What are the biological pesticides?

According to the standards of the Food and Agriculture Organization of the United Nations, biological pesticides are generally natural compounds or genetic modifiers, mainly including biochemical pesticides and microbial pesticides, and agricultural antibiotic preparations are not included.

China's biological pesticides can be divided into four parts: microbial live pesticides, microbial metabolite pesticides, plant-derived pesticides, and animal-derived pesticides according to their compositions.

According to the control object, it can be divided into insecticides, fungicides, herbicides, acaricides, rodenticides, plant growth regulators, etc.

In the practical application of agricultural production in China, biological pesticides generally refer to microorganisms that can be industrialized on a large scale.

2. Advantages and disadvantages of biopesticides.

1. Advantages: The most prominent point of biopesticides is their safety, which is safe for humans and animals, the environment, and natural enemies.

Some biopesticides are living organisms, which can reproduce on their own after use, greatly extending the effective period and building a new environment of ecological balance.

In addition, biopesticides are widespread, have great potential for improvement, and are not easy to produce resistance, and the advantages of many aspects make biopesticides a hot spot in recent years.

2. Disadvantages: Compared with chemical pesticides, there are also many inherent weaknesses, such as slow onset, susceptibility to temperature and humidity and other conditions, and complex action components.

3. The scope of use of biological pesticides.

Biological pesticides are mainly used to control cotton bollworm, red bollworm, bridge-building worm, tobacco green worm and so on.

Grain crops of two borer, three borer, rice bract, rice leaf borer, etc.

Vegetable cabbage worms, diamondback moths, vegetable borers, etc.

Fruit tree pine caterpillars, peach heartworms, inchworms, big bag moths, leaf roller moths, etc.

The appropriate period for the prevention and control of cotton bollworm is: in the peak period of oviposition, that is, when the number of eggs reaches 20 grains, the pesticide will be applied once every 3 4 days, and the pesticide will be applied 2 or 3 times per generation, and the number of pesticide applications will be appropriately increased in the year of large occurrence.

Other pests such as cabbage worms, tobacco worms, bean moths, corn borers, pine caterpillars and fruit tree pests can be applied at the peak of oviposition or the early instar of larvae.

Fourth, the use of biological pesticides should look at the temperature in four ways.

When used at 25 30 hours, the control effect is 1 2 times higher than that at 10 15 hours.

Therefore, it is best not to use Linghui when the temperature is lower than 20.

2. Look at the humidity.

The higher the humidity of the environment, the better the control effect.

Powder BT can give full play to its efficacy under high humidity conditions.

3. Look at the sun.

In order to avoid the damaging effect of ultraviolet rays in the sun on the spores, it is best to choose to spray it on a cloudy day or after a long time in the afternoon.

4. Watch the rain.

Moderate to high rainfall will wash away the liquid sprayed on the stems and leaves of the plant, thus reducing the effectiveness of the drug.

After spraying, the drizzle in the breast is reduced, which has the effect of increasing the control effect.

If the spray ruler encounters moderate to heavy rain after reciting the medicine, it must be sprayed.

The temperature is too low during use. Some farmers do not pay attention to environmental factors when trying microbial live pesticides, do not choose to try them in high temperature weather conditions, and even try to use them in cold weather conditions in winter and early spring, but do not achieve the expected results. This is because biopesticides are tested at higher temperatures.

The results showed that the control effect of 25 30 sprayed microbial live pesticide was 1 2 times that of 10 15 sprayed microbial live pesticide.

Suitable for dry weather. If it is applied in hot and dry weather conditions from 10 a.m. to 4 p.m. on a sunny day, farmers report poor results. This ridge is mainly due to the lack of humidity in the environment.

For example, Beauveria bassiana, as a fungal insecticide, mainly contains live Beauveria bassiana spores. After application, the spores germinate and multiply in the insect mold under appropriate conditions, and are directly in contact with the insect body or eaten into the digestive tract by pests, resulting in the slow death of pests. The hyphae and conidia of dead insects are transmitted to other healthy insects by contact or air currents, resulting in epidemics and the death of large numbers of individuals.

Beauveria bassiana that falls in the soil can also overwinter in the soil, infect the insect body the next year, and continue to kill the insects, with obvious sequelae. Therefore, it should be used when the humidity is high, such as on cloudy days, after rain, or in the morning.

Don't hide from the sun. Do not use it at noon, avoid high temperatures and strong sunlight, resulting in a decrease in the efficacy of the drug. Microorganisms live pesticides, afraid of strong light.

Ultraviolet rays in sunlight have a lethal killing effect on spores, and UV radiation can also deform and reduce the effect on the crystals that accompany the spores. Therefore, it should be used after 4 p.m. or on a cloudy day, and the effect will be greatly exerted.

Mix with biocide. For example, as a fungal insecticide, the medicinal effect of black fungus is achieved through the action of live spores of black fungus. After application, the live spores infect the aphids and die, which can continue to infect and cause a large number of deaths.

As a live bacteria, if mixed with a fungicide, they will be killed by the fungicide and naturally lose their insecticidal effect.

It should not be used under the condition of high temperature, and it is necessary to pay attention to the weather, pay attention to the proportion, pay attention to the medicinal properties of the dry liquid pants, and have no price and no simple cost, which are easy to misunderstand.

The biggest misunderstanding of the first point will form the loss of some drugs as a whole, the second point is to put a lot of water in the process of use, in this case there is no effect, the third point is not well mastered, and time is also the biggest misunderstanding, so we must carefully read the corresponding number of traces of some knowledge.

For example, a lot of agricultural scale sprocket drugs will be mixed together, and then there will be a relatively large amount of pesticides sprayed, and then there is no dilution work, and at the same time, in the process of spraying pesticides, the ants are not dressed neatly, and then there is also a situation of over-instructing Xinmin.