As a common fungal disease in the growth and development of pear trees, scab disease poses a serious threat and harm to the yield and quality formation of pear trees.
Pear scab is also the most "stubborn" fungal disease that is the most "worrying" and the most difficult to "prevent" in the process of planting pear trees. In many years, some fruit farmers have ruined their annual income on this "stuck neck" disease.
Picture 01~02): Robustly developed young pear fruit
Therefore, it is of great significance to do a good job in the prevention and treatment of pear scab for the high yield, stable yield and even high yield of pear trees, and to improve the planting efficiency of fruit trees.
In recent years, with the continuous progress and improvement of agricultural science and technology, methoxyacrylate fungicides have been widely used in the prevention and correction of scab in pear trees, and have been favored by the majority of agricultural dealers and consumers.
In this issue, Qingjiang Crane will focus on and chat with all the teachers about the application of the methoxyacrylate fungicide, the prevention and control agent of pear scab, "methoxyacrylate fungicide", aiming to focus on azoxystrobin, etherstrobin, pyraclostrobin, pyroxystrobin and syringoxystrobin in methoxyacrylate fungicides, and discuss its application and advantages in the prevention and treatment of pear scab, as well as the methods of efficient use. I hope you like and actively participate in the interactive comments, forward and share the pictures and texts of this issue.
Image 03~04): Fungicide "Pyroxystrobin"
Advantages of methoxyacrylate fungicides for the prevention and treatment of scab in pear trees:
Methoxyacrylate fungicides have shown significant advantages in the prevention and control of scab in pear trees due to their efficient and broad-spectrum bactericidal properties. Among them, azoxystrobin, etherstrobin, pyraclostrobin and other agents can effectively inhibit the germination of pathogen spores, the growth of hyphae and the formation of spores by inhibiting the respiration of pathogens.
Pyroxystrobin and syringoxystrobin have dual protective and therapeutic effects, and have a significant effect on the prevention and control of scab in pear trees.
These fungicides not only have good permeability and systemic activity, which can act quickly on pathogens, but also have a long duration of effect, and can maintain the inhibitory effect on pathogens for a long time. In addition, they can also have a positive physiological regulation effect on pear trees, improve the disease resistance of pear trees, and promote the healthy growth of pear trees.
Image 05~06): Fungicide "Pyroxystrobin"
01) Azoxystrobin is used for the prevention and control of scab in pear trees:
"Azoxystrobin" has the effect of protective treatment, eradication of infiltration, systemic conduction, is a mitochondrial respiration inhibitor, destroys the energy formation of pathogenic bacteria, and makes the bacteria starve to death.
Agents that are resistant to benzamides and benzimidazole fungicides can be replaced or rotated with "azoxystrobin".
02) Etherstrobin for the prevention and control of scab in pear trees:
"Etherstrobin" also has the advantages of protection and prevention, eradication of infiltration, and systemic conduction. It can act on the diseases that occur at all stages of pear trees, inhibit the mitochondria of pathogenic bacteria, prevent the invasion of germ tubes, and control the occurrence of diseases.
"Etherstrobin" has strong permeability, stable efficacy, good lipophilicity, and is easily absorbed by the waxy layer of pear leaves and young fruit epidermis, and is gaseous diffusion, resistant to rain erosion, and has a long duration of effect.
Picture 07~08): Fungicide "azoxystrobin"
03) Pyraclostrobin for the prevention and control of scab in pear trees:
"Pyraclostrobin" is also a mitochondrial respiratory inhibitor, with a very strong protective treatment, eradication of osmotic systemic effect, has a good preventive and therapeutic effect on many fungal diseases, the agent by inhibiting spore germination and mycelial growth and exert a medicinal effect, high drug activity, rapid action, long duration of effect, rain erosion resistance. In addition to the bactericidal activity, the agent also has "plant regulation activity", which can stimulate the increase of chlorophyll content in pear leaves, enhance photosynthesis, and improve the comprehensive stress resistance of pear trees.
04) Pyroxystrobin for the prevention and control of scab in pear trees:
"Pyroxystrobin" is also a member of the "methoxyacrylate fungicide" family, which also has the effect of preventive protection and eradication of osmotic systemic absorption. It also has the effect of "plant growth regulator". This property, similar to that of pyraclostrobin, can make pear leaves greener and the plant more robust.
Image 09~10): Fungicide "pyraclostrobin"
05) Syringoxystrobin for the prevention and control of scab in pear trees:
"Syringrobin" is a member of the methoxyacrylate fungicide, which has a good preventive protection and immune effect on fungal diseases on pear trees.
The salient feature of its agent is that the "ingredient structure" contains "syringolide genes", which can "mislead" the invasion direction of pathogenic bacteria, so that pathogenic bacteria cannot find the "target" of infection.
At the same time, after absorbing the syringoxystrobin, the pear tree can also "start" the emergency response and disease resistance factors, strengthen its own antibacterial system and immune function "construction", improve the disease resistance of the pear tree, improve the quality of pear fruit, and help increase yield and income.
How to use methoxyacrylate fungicides for the prevention and control of scab in pear trees:
When using methoxyacrylate fungicides to prevent and control scab in pear trees, it is necessary to master the correct use method.
Picture 11~12): Fungicide "azoxystrobin"
First of all, according to the growth stage of the pear tree and the occurrence of diseases, combined with the chemical characteristics of the agent, the appropriate agent and the timing of application should be selected. In general, it is best used in the early stage of disease or during the prevention phase.
Secondly, it is necessary to strictly control the dosage and frequency of use to avoid excessive use, which will lead to drug harm and resistance. Use up to 3 times in an annual growth cycle, taking care to alternate with other fungicides to delay the development of resistance.
01) How to use azoxystrobin:
In the period of pear inflorescence separation, after pear flowering and the early stage of pear scab, it can be treated with 20% azoxystrobin wettable powder 800 times, 25% azoxystrobin water dispersible granules 1000 times, 35% azoxystrobin suspension 1200 times, 50% azoxystrobin water dispersible granules 2000 times, 60% azoxystrobin water dispersible granules 2500 times, 80% azoxystrobin water dispersible granules 3500 times liquid spray stems and leaves.
Picture 13~14): Fungicide "azoxystrobin"
02) How to use etherstrobin:
It can be sprayed with 500 times of 10% etherstrobin water emulsion, 1500 times of 30% etherstrobin suspension, 2000 times of 40% etherstrobin suspension, 3000 times of 60% etherstrobin water-dispersible granules, and 4000 times of 80% etherstrobin water-dispersible granules in the early stage of pear inflorescence separation, 3000 times of 60% etherstrobin water-dispersible granules, and 4000 times of 80% etherstrobin water-dispersible granules.
03) How to use pyraclostrobin:
In the period of pear inflorescence separation, after pear flowering and the early stage of pear scab, you can use 1500 times of 20% pyraclostrobin emulsifiable concentrate, 2000 times of 25% pyraclostrobin suspension, 2000 times of 25% pyraclostrobin aqueous emulsion (or microemulsion), or 2000 times of 25% pyraclostrobin wettable powder, or 2500 times of 30% pyraclostrobin emulsifiable concentrate, or 2500~3000 times of 30% pyraclostrobin water dispersible granules, or 50% Pyraclostrobin water dispersible granules 4000 times liquid spray stem and leaf treatment can be done.
Picture 15~16): Fungicide "pyraclostrobin"
04) How to use pyroxystrobin:
In the pear inflorescence separation period, two-thirds of the pear flowers, and at the beginning of pear scab, the treatment effect is better with 22.5% pyroxystrobin suspension 1500 times, 30% pyroxystrobin suspension 2000 times, 50% pyroxystrobin water dispersible granules 3000 times, or 70% pyroxystrobin water dispersible granules 5000 times liquid stems and leaves.
05) How to use syringoxystrobin:
In the inflorescence separation period of the pear tree, two-thirds of the pear tree flowers, and the early stage of pear scab disease can be treated with 20% syringoxystrobin suspension 2000~2500 times liquid spray stems and leaves.
At the same time, in order to improve the utilization rate and control effect of the agent, methoxyacrylate fungicides can be mixed with other pesticides or fertilizers.
For example, it can be mixed with triazole fungicides to enhance the therapeutic effect, and mixed with foliar fertilizers can meet the nutritional needs of pear tree growth and disease control at the same time.
Picture 17~18): pear scab
Methoxyacrylate fungicides should be used for the prevention and control of scab in pear trees, and the following matters should be noted:
Although methoxyacrylate fungicides have significant advantages in the prevention and control of scab in pear trees, there are still some problems that need to be paid attention to in the process of use.
First of all, these fungicides are safe for pear trees, but they are highly permeable and still need to be used in accordance with the recommended dosage to avoid excessive damage. Secondly, it is necessary to pay attention to safety precautions during use to avoid harm to the human body and the environment.
In addition, long-term use of the same fungicide may lead to the development of resistance to pathogenic bacteria, so it is recommended to use it interchangeably with other fungicides to delay the development of resistance.
Words written after the "methoxyacrylate" fungicide for the prevention and control of scab in pear trees:
Picture 19~20): pear stalk, petiole susceptible
As an important agent for the prevention and control of scab in pear trees, methoxyacrylate fungicides provide a strong guarantee for the healthy development of pear tree industry due to their efficient and broad-spectrum bactericidal characteristics and positive physiological regulation.
In the process of use, we should master the correct use method, pay attention to drug safety and resistance risk management, so as to achieve effective prevention and control of scab and healthy growth of pear trees.
Picture 21~22): young pear fruit susceptible to scab