As one of the important methoxy acrylate fungicides , pyraclostrobin has been widely used since its introduction into the market, with a wide spectrum of bacteria, high target bacteria, strong immunity, improved crop stress resistance, promotion of crop growth, anti-aging, etc. The functions of such fungicides can be verified and approved by most users. Today, I have sorted out how to use pyraclostrobin.
1. Which is better for pyraclostrobin, emulsifiable concentrate, suspending agent and powder?
Powder
It will be dispersed during processing and use, which will cause environmental pollution, which is the biggest problem of powder.
2. Cream
Originally used toluene, xylene, but the country does not advocate the registration of emulsifiable oil, it began to use microemulsion, water emulsion, or replace with vegetable oil, is a relatively backward dosage form, but some products must be made into emulsifiable concentrate.
3. Suspending agent
The suspending agent is more advanced, the suspending agent process is stricter, the processing cost is also high, but the state is not stable, and stratification may occur for a long time.
2. What is the relationship between pyraclostrobin, azoxystrobin and ether oxystrobin?
Ethoxystrobin, azoxystrobin, pyraclostrobin is called the three brothers in the fungicide, they are all methoxy acrylates, methoxy acrylate fungicides are natural methoxy acrylates Antibiotics are a new class of fungicides developed for lead compounds.
1. Common features.
(1) Unique mechanism of action.
They are all mitochondrial respiratory inhibitors of pathogenic fungi and are effective against strains that have developed resistance to sterol inhibitors such as triazoles, phenylamides, dicarboxamides, benzimidazoles.
(2) A broad spectrum of sterilization.
It shows excellent activity against almost all fungi (Ascomycetes, Basidiomycetes, Oomycetes and Deuteromycetes), such as powdery mildew, leaf blight, red spot, and net blotchosis in wheat. , black shank, rice blast, sheath blight, as well as downy mildew, blight and other activities have a very good activity, the prevention and control of disease is even more important.
(3) It has protective and therapeutic effects, and has good penetration and systemic action. It can be used in the methods of stem and leaf spray, water surface application and seed treatment.
(4) It is safe for crops, people, animals and beneficial organisms, and has no pollution to the environment.
2. Difference:
(1) azoxystrobin
The germicidal spectrum is very broad and is effective against most of the pathogens in Ascomycetes, Basidiomycetes, Deuteromycetes and Oomycetes.
(2) Esteric acid ester
The germicidal spectrum is not as broad as azoxystrobin, but has special effects on powdery mildew.
(3) Pyraclostrobin
It has the strongest antibacterial activity and has strong ability to inhibit the germination of pathogenic spores. It has significant antibacterial activity against plant pathogens such as ascomycetes, basidiomycetes, deuteromycetes and oomycetes, and has potential therapeutic activity. It can be used to control a variety of crop fungal diseases. Pyraclostrobin has strong conductive activity in plants, which can improve crop physiology and enhance crop stress resistance.
All three compounds have the function of protection, treatment and eradication. The biggest difference is that the ethereal ester is less mobile than the other two. Pyraclostrobin is more active than the first two, and azoxystrobin is more permeable.
Third, pyraclostrobin has cure rickets?
Pyraclostrobin can be used in various crops such as wheat, peanuts, rice, vegetables, fruit trees, tobacco, tea trees, ornamental plants, and lawns.
Control various diseases such as leaf blight, rust, powdery mildew, downy mildew, blight, anthracnose, scab, brown spot, and blight caused by ascomycetes, basidiomycetes, deuteromycetes and oomycetes.
Good for cucumber powdery mildew, downy mildew, banana scab, leaf spot, grape downy mildew, anthracnose, powdery mildew, early blight of tomato and potato, late blight, powdery mildew and leaf blight Control effect.
4. Usage and dosage of pyraclostrobin on various crops
1. How much water is added?
(1) How many pounds of water does 100g play?
You can hit 300 pounds of water.
(2) Can a bucket of water use 20 grams?
If you use wheat, rice and other crops, there is no problem, but when used on sensitive crops, such as strawberries, it may cause phytotoxicity, so a bucket of water 10g ~ 15g is a safer dosage.
2. Grape usage and dosage
(1) How to use it?
For example, to prevent and treat downy mildew, powdery mildew, gray mold, brown spot, brown colt, etc. can be added to pyraclostrobin, when the first leaf of the grape can be used alone, prevention and The leaves will also turn green. (Pyrazolone against grape powdery mildew and frosty fruit, even in the case of serious disease, the prevention and treatment of the two diseases is significant.)
(2) How much is the grape?
30 kg of water on the grapes in normal use, use 10 grams to 15 grams; if you mix, use 10 grams of a pot of water; 100 grams of pyrazole, water with 300 pounds of water, if you mix, see what you fight Disease, such as: grape downy mildew, can be used with carbaryl or enoylmorpholine.
3. How to use strawberries?
What should I pay attention to when pyraclostrobin is used in strawberry protection? What diseases are mainly prevented? Does the strawberry flowering period have a long effect on flowers and bees?
A broad-spectrum fungicide, mainly for prevention, mainly for preventing white powder, downy mildew, leaf spots, etc. In the early stage, it is prevented by pyrazole when there is no disease, and it can be used when it is used later. For example, downy mildew can be combined with dimethomorph, carbendazim or the like.
Experiments have shown that bees are safe for flowering bees below 25 ml of a pot of water, but care should be taken to avoid application at high temperatures and low temperatures. Otherwise, there is a phytotoxicity that cannot be mixed with copper preparations.
4. How to use cucumber?
It is very effective on cucumber, preventing downy mildew, powdery mildew, anthracnose, spotted diseases, increasing chlorophyll content, increasing photosynthesis, reducing plant respiration and improving crop stress resistance.
Five, the timing of the use of pyraclostrobin
(1) The timing of the use of this type of fungicide must be advanced, to prevent disease as a protective agent, or to take advantage of the drug at the beginning of the disease, such as before sowing, after emergence, or when planting.
(2) Pyraclostrobin is known for its efficacy and long-lasting effect, and it is still slightly insufficient compared with other targeted fungicides. It is best to use it with other fungicides or with a compounding agent.
(3) The action site of pyraclostrobin is relatively simple, so the resistance starts relatively fast. Be sure to control the number of uses during use to avoid accelerated resistance.
(4) The strong permeability makes pyraclostrobin excellent in affinity with the surface of the leaf, greatly improving the prevention effect and the duration of effect, but pay attention to the occurrence of phytotoxicity. Especially in the crop seedling nursery period, the crop growth is strong and the high temperature and high humidity conditions, the use concentration of pyraclostrobin will have a certain risk of phytotoxicity.
6. The problem of compounding pyraclostrobin
1. I would like to ask if pyraclostrobin is mixed with other medicines. Anything to pay attention to?
Be careful not to mix with alkaline fungicides, and do not mix with emulsifiable concentrates or silicones. Mix the concentration with other chemicals and do the test.
2. What should I pay attention to when mixing pyrazole and foliar fertilizer ? And alginic acid?
First: dissolve the foliar fertilizer first, then pour the pyrazole, and then pour the other things.
3. In order to improve the efficacy, can you add silicone in pyraclostrobin?
Pyraclostrobin itself has a high penetration and it is not recommended to add silicone.
4. Can pyraclostrobin be mixed with brassinomycin?
They can be mixed, but it is best to mix them separately after two dilutions.
5. Can pyraclostrobin be used together with peracetic acid?
Oxidizing pesticides such as potassium permanganate, hydrogen peroxide, peracetic acid, and chlorobromide are not recommended for mixing.
6. Pyraclostrobin is compounded with a triazole fungicide. Can the efficacy be improved?
The compound triazole fungicide has a good effect and improves the drug effect. The endogenous conductivity of pyraclostrobin is not strong, but has good permeability.
Seven, other problems such as phytotoxicity
1. Will the powder be easily phytotoxic?
Pyrazole powder does not cause phytotoxicity. I would like to tell you how the phytotoxicity is caused. If you have used sensitizer MnZn powder, you should know that this is relatively easy to cause phytotoxicity. Many companies like to use the big bag in order to pursue cheaper. In the use of fruit trees, zinc-manganese-zinc must be in a complex state. If it is not complex, it is easy to release this manganese ion prematurely, and then the powder can not meet the requirements, it is easy to cause phytotoxicity.
Our pyraclostrobin will generally not cause phytotoxicity at reasonable dilution ratios. However, if there is a precedent for the phytotoxicity of pyraclostrobin in the local area, it is recommended to experiment first.
2. Will mixing with 920 gibberellin cause phytotoxicity?
Under normal circumstances, there will be no phytotoxicity unless you look at what crop you are on, for example:
On the grapes, mixed with 920 gibberellin may cause phytotoxicity, not because of pyrazole, but because the powder will adsorb the surrounding drugs, causing local concentrations to become medicinal, but this need The actual operation, most of which is caused by the increase in the amount of consumption.
3. If it is a health supplement, can it be used multiple times?
Can not be used multiple times, although there is a health effect, but the use of more times will still produce resistance.
4. How to do it, can pyraclostrobin maintain vitality?
First of all, you must have a correct understanding of pyraclostrobin. It is a good ingredient, but it is by no means a panacea. It is a good product to put the products in the right place.
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