Since its market launch, pyraclostrobin has proven effective in many ways, including broad-spectrum fungicide application, targeting a wide range of pathogens, strong immunity, enhanced crop resistance, growth promotion, and anti-aging properties. These effects have been validated and widely accepted by farmers. However, even the best pesticide is wasted if used incorrectly!
Pyraclostrobin is a novel broad-spectrum fungicide. It is a mitochondrial respiration inhibitor with protective, curative, and leaf transdermal effects. Generally, it is applied three times, with a 10-day interval between applications. The number of applications depends on the severity of the disease. It is safe for cucumbers and bananas, with no reported phytotoxicity.
1. About Pyraclostrobin
Pyraclostrobin, also known as azoxystrobin, was first discovered in 1993. It is a broad-spectrum fungicide in the methoxyacrylate class, possessing a pyrazole structure. Registered and marketed in 2001, its mechanism of action is to inhibit mitochondrial respiration, leading to cell death and thus achieving fungicidal effects.
2. What diseases does pyraclostrobin treat?
Pyraclostrobin can be used on various crops such as wheat, peanuts, rice, vegetables, fruit trees, tobacco, tea trees, ornamental plants, and lawns.
It controls a variety of diseases caused by ascomycetes, basidiomycetes, deuteromycetes, and oomycetes, including leaf blight, rust, powdery mildew, downy mildew, blight, anthracnose, scab, brown spot, and damping-off.
It has good control effects on powdery mildew and downy mildew in cucumbers, black spot and leaf spot in bananas, downy mildew, anthracnose, powdery mildew in grapes, and early blight, late blight, powdery mildew, and leaf blight in tomatoes and potatoes.
3. Product Features
(1) Broad spectrum of fungicides, wide range of applications. Pyraclostrobin exhibits excellent activity against almost all fungal diseases and can be used to control leaf blight, rust, powdery mildew, downy mildew, blight, anthracnose, scab, brown spot, damping-off, and other plant diseases caused by almost all types of fungal pathogens. It is widely applicable to over 100 crops, including wheat, peanuts, rice, vegetables, fruit trees, tobacco, tea trees, and ornamental plants.
(2) Combining prevention and treatment with health benefits. Pyraclostrobin has both protective and curative effects, with good penetration and systemic action. It can be used through foliar spraying, water application, and seed treatment.
Pyraclostrobin can also induce physiological changes in many crops (especially grains), increasing nitrogen absorption during rapid growth stages, reducing ethylene biosynthesis, and delaying crop senescence. When crops are attacked by pathogens, it can accelerate the formation of resistance proteins, enhance the crop's own immunity, and improve the crop's resistance to adverse growth factors.
(3) Good compatibility and low toxicity. Pyraclostrobin can be mixed with various fungicides such as difenoconazole, mancozeb, dimethomorph, and triazoles, not only broadening the fungicidal spectrum but also creating synergistic effects. It can also be mixed with various insecticides, plant growth regulators, and foliar fertilizers, achieving multiple effects of disease prevention and treatment, insect control, growth regulation, and nutrient supplementation with a single application. This is a key reason why pyraclostrobin is frequently included in various yield-enhancing packages.
Pyraclostrobin also features resistance to rain washout, a long residual effect, low toxicity, and safety for users and the environment.
3. Application Methods
Pyraclostrobin can be applied in various ways, including foliar spraying, water application, and seed treatment, but foliar spraying is the primary method.
For example, for a single application of 25% pyraclostrobin, under normal circumstances, 10-15g is sufficient for 30 catties of water. For fruit trees, a dilution ratio of 1500-2000 times is recommended.
4. Application and Dosage of Pyraclostrobin on Various Crops
(1) How many kilograms of water can 100g be used for?
It can be used for up to 300 kilograms of water.
(2) Is 20g per bucket of water okay?
It's fine for crops like wheat and rice, but it may cause phytotoxicity on sensitive crops like strawberries. Therefore, 10-15g per bucket of water is a relatively safe dosage.
Cereal Crops
Pyraclostrobin has broad-spectrum fungicidal activity against cereal crop diseases.
(1) It has outstanding control effects on diseases of cereal leaves and grains, and significantly increases yield.
Single-agent experiments have shown its effectiveness in controlling wheat leaf blight, and its concurrent effect on wheat glume blight has also been observed.
Even in severe cases, pyraclostrobin effectively prevents leaf rust and stripe rust from harming barley and wheat. It also controls barley leaf blight and netting disease. Pyraclostrobin is also effective against other cereal diseases, such as wheat leaf spot, snow rot, white spot, and barley clouding.
(2) Is 10g per acre too small for a compound application on wheat?
If it's a compound application, it's not too small. If used alone, it's a bit small. For the first application, you can use 10-20g per acre. For the second application, it's recommended to combine it with other products.
Legumes
(1) Pyraclostrobin has excellent control effects on major legume diseases such as bean leaf spot, rust, and anthracnose.
(2) Pyraclostrobin effectively controls peanut brown spot, black spot, snake-eye disease, rust, and scab. It also has excellent control effects on peanut white mold.
5. Application and Dosage on Grapes
(1) How to use it?
For example, to prevent downy mildew, powdery mildew, gray mold, brown spot, and rachis rot, pyraclostrobin can be added. It can be used alone when the grape leaves are just emerging, preventing disease and turning the leaves green. (Pyraclostrobin is highly effective against both powdery mildew and frost, even in severe cases.)
(2) What is the dosage on grapes?
For grapes, under normal single-use conditions (30 catties water), use 10 to 15 grams; for compound applications, use 10 grams per pot of water; 100 grams of pyraclostrobin should be diluted in 300 catties of water. For compound applications, the dosage depends on the disease being treated. For example, for grape downy mildew, it can be combined with cymoxanil or dimethomorph.
Pyraclostrobin has excellent control effects on major diseases of tomatoes and potatoes, such as early blight, late blight, powdery mildew, and leaf blight.
6. How to use on citrus?
Apply before the peak disease season. It has a good preventative effect against common diseases such as anthracnose, scab, and canker.
Research results show that pyraclostrobin has a good control effect on citrus canker, gummosis, and black rot. Alternating its use with other fungicides can also improve citrus quality.
7. How to use pyraclostrobin suspension on pear trees?
Use 20-30g per acre, diluted in 60 catties of water, and spray evenly to prevent pear black spot disease. It can also be combined with fungicides such as difenoconazole.
8. How to use on apples?
Mainly for controlling fungal diseases such as powdery mildew, early leaf drop, and leaf spot. However, it should be noted that some Gala varieties are susceptible.
9. How much should be used on Hainan mangoes?
Basically, 10g per container. If using a compound formulation, 10g is enough for one container of 30 catties of water. If using alone, use 10-15g per container of water.
10. How to use on jujubes?
For jujubes, to prevent sooty mold during flowering and anthracnose later, apply a 2000-fold dilution as a single application. For the second application, combine with tebuconazole or difenoconazole (for sooty mold, add an aphid control).
11. How to use on strawberries?
What precautions should be taken when using pyraclostrobin on protected strawberries? What diseases does it mainly control? Strawberries have a long flowering period; does it affect flowers and bees?
It's a broad-spectrum fungicide, mainly for prevention, primarily controlling powdery mildew, downy mildew, and leaf spot. Use pyraclostrobin for prevention in the early stages before disease occurs. When using it later, combine it with other fungicides, such as dimethomorph or carbendazim for downy mildew, or use them alternately.
Experiments have shown that bees are safe to use in water containing less than 25 ml of water during the flowering period. However, it is important to avoid application at high or low temperatures, as this can cause phytotoxicity. It should not be mixed with copper-based fungicides.
12. How to use on watermelons?
It can be used in the early stages to prevent vine blight, anthracnose, and other diseases in the mid-to-late stages. Depending on local conditions, one or two applications can be used for early prevention, and later applications can be combined to prevent downy mildew and blight.
13. How to use on cucumbers?
It works very well on cucumbers, preventing downy mildew, powdery mildew, anthracnose, and leaf spot diseases. It increases chlorophyll content, improves photosynthesis, reduces plant respiration, and enhances crop resistance.
Note: Timing of application
(1) This type of fungicide must be applied early, as a protectant to prevent disease. Applying it before sowing, after emergence, or at the initial stage of disease occurrence, such as during transplanting, will maximize its advantages.
(2) Pyraclostrobin excels in both preventative and sustained efficacy, but it is slightly less effective compared to other targeted fungicides. It is typically used in combination with other fungicides or as a compound formulation.
(3) Pyraclostrobin has a relatively singular site of action, leading to rapid resistance development. Therefore, the frequency of application must be carefully controlled to avoid accelerating resistance formation.
(4) Pyraclostrobin's strong penetrability allows it to adhere well to leaf surfaces, significantly enhancing its preventative effect and duration of action. However, the risk of phytotoxicity should be noted. Especially during the seedling stage in nurseries, when crop growth is vigorous and conditions are high in temperature and humidity, excessively high concentrations of pyraclostrobin can pose a risk of phytotoxicity.
Precautions
(1) Pyraclostrobin is toxic to aquatic organisms such as fish and shrimp. It should not be used near fishponds or in shrimp-rice fields. When used in combination with other agents during the seedling and young fruit stages of crops, the dosage should be appropriately reduced, especially when mixed with emulsifiable concentrates. When mixed with emulsifiable concentrates or organophosphate pesticides, fruit burn may occur on jujube, banana, and mango trees.
(2) Due to continuous use over many years and the inherent characteristics of the product, although pyraclostrobin has a long residual effect, its single-agent therapeutic effect is not ideal, and its efficacy is relatively slow. It is more often used as a protectant and should be applied before or at the initial stage of disease occurrence. It is best used in combination with different types of fungicides.
