Imidazole fungicide prochloraz
What is prochloraz (67747-09-5)?Prochloraz belongs to the imidazole fungicides, with the chemical formula C15H16Cl3N3O2, cas 67747-09-5, unstable to concentrated acid, concentrated alkali and light. The original drug (purity is about 97%) is a yellow-brown liquid that solidifies when cooled and has an aromatic smell. Low toxicity. It has obvious control effect on diseases caused by ascomycetes and deuteromycetes in many crops. It can also be mixed with most fungicides, insecticides and herbicides, all of which have good control effects. It has the effect of treating and eradicating various diseases on field crops, fruits, vegetables, turf and ornamental plants.
The pesticide prochloraz is a broad-spectrum, highly efficient, and environmentally friendly fungicide. It has the characteristics of strong systemic conductivity, good quick-acting effect, and long-lasting effect. It also has multiple functions such as prevention, protection, and treatment. At present, the water emulsion with the highest content in China is 45% prochloraz water emulsion. The main ingredients are prochloraz 1 to 45%, emulsifier 1 to 20%, antifreeze 1 to 15%, defoaming agent 0 to 2%, Solvent 1 ~ 45%, thickener 0.1 ~ 3% and the balance water. During actual use, it was found that by spraying onto the surface of plants, due to years of use, the insects have developed certain antibodies, resulting in an unsatisfactory sterilization rate. Since prochloraz aqueous emulsion is low-toxic, it is not harmful to the environment. The pollution is not large, so consider increasing the concentration of prochloraz to increase the sterilization rate.
Prochloraz (67747-09-5) bactericidal mechanism
The fungicide prochloraz inhibits the biosynthesis of sterols in the bacteria, preventing the growth of the bacteria. It has excellent control effect against various diseases caused by Ascomycetes and Deuteromycetes, especially effective against anthracnose of various crops.
Physicochemical properties of prochloraz (67747-09-5)
Vapor pressure: 0.48 mPa (20℃)
Solubility: Low solubility in water, soluble in most organic solvents such as acetone, methylene chloride, ethanol, ethyl acetate, toluene, xylene, etc.
Preparation method of prochloraz (67747-09-5)
1. Use 2,4,6-trichlorophenol as raw material and react with 1,2-dibromoethane, propylamine, phosgene and imidazole in sequence to prepare prochloraz.
2. It is prepared by reacting the intermediate product generated by the reaction of imidazole with phosgene and the intermediate product of 2,4,6-trichlorophenol with 12-dichloroethane and propylamine in sequence.
Features of prochloraz (67747-09-5)
1. Wide applicability. The fungicide prochloraz can be widely used on food crops such as wheat and rice, fruit and vegetable crops such as watermelon, cucumber, pepper, garlic, and celery, fruit trees such as apples, bananas, and citrus, as well as greening and ornamental plants such as lawns and flowers. The application scope includes 37 crops and places.
It can be used to prevent and control wheat powdery mildew, scab, rice bakanae, rice blast, watermelon and cucumber anthracnose, pepper fusarium wilt, garlic leaf blight, apple, banana, lychee anthracnose, citrus anthracnose, and penicillium. , green mold, pedicle rot, fusarium wilt, anthracnose, powdery mildew, etc. on lawns and ornamental flowers.
We have mentioned dozens of crops and diseases, but there is one disease that has been mentioned many times on different crops. Yes, it is anthracnose. Therefore, prochloraz is often used by many people to control vegetables, Anthracnose in fruits and other crops.
2. The fungicide prochloraz has both preventive, protective and therapeutic effects. Prochloraz has a good conductive effect. After the crop is applied, the active ingredients will be quickly transmitted to all parts of the plant, which can comprehensively protect the crop and have a certain therapeutic effect on the diseased parts.
However, prochloraz is not systemic, so in practical applications, prochloraz is rarely used alone, and is more commonly used in combination with tebuconazole, difenoconazole, flusilazole, etc., which have good systemic properties. The mixing of sexual products, or the use of their compound products, not only expands the bactericidal spectrum, but also plays the role of mutual synergy and slowing down the resistance of pathogenic bacteria, killing multiple birds with one stone.
3. The fungicide prochloraz activates plant disease resistance factors, has good quick-acting effect and long-lasting effect. Especially when applied to fruit trees, the fungicide prochloraz not only plays a role in disease prevention and sterilization, but also has the effect of improving fruit quality and beautifying the fruit surface. Therefore, many farmers will choose to use it when the last pesticide is used near harvest. Prochloraz can not only prevent and cure diseases, but also improve the appearance and commerciality of fruits.
The fungicide prochloraz is also often used to preserve the freshness and antisepsis of fruits such as bananas, mangos, and lychees. On the day of fruit harvest, it can be soaked or sprayed to protect the fruits or parts damaged by external forces from being infected by pathogenic bacteria and reduce the risk of fruit damage. Rot loss occurs during storage and transportation, extending the storage time.
The role of prochloraz (67747-09-5)
The pesticide prochloraz can be used for systemic sterilization. Inhibits sterol demethylation. It is mainly used to control Ascomycetes, Basidiomycetes and Deuteromycetes fungi, such as apple scab, powdery mildew, cereal fungi, Septoria, Rhizoctonia, etc. It is effective against various pathogenic bacteria on mushrooms and sweet potatoes, peanut leaf spot, and rapeseed sclerotinia. Triazole fungicides destroy and prevent the biosynthesis of ergosterol, causing the cell membrane to fail to form and killing the bacteria. It is effective against diseases caused by ascomycetes, basidiomycetes and deuteromycetes, but is ineffective against oomycetes and has special effects on pear scab.
The pesticide and fungicide prochloraz is a broad-spectrum, low-toxicity agent that has multiple functions such as prevention and protection. The contained prochloraz is an imidazole broad-spectrum agent. It works by inhibiting the biosynthesis of sterols and has no systemic effect. It is effective in preventing various diseases caused by Ascomycetes and Deuteromycetes. Using gene induction technology, plant disease resistance genes are expressed, with good properties and long lasting effect.
1. Routinely used to prevent and control anthracnose and leaf spot on fruits and vegetables. It can also prevent and control rice bakanae disease, rice blast, etc. Citrus anthracnose, stem rot, penicillium, green mold, banana anthracnose, leaf spot, mango anthracnose, peanut leaf spot, pepper, eggplant, melon, tomato and other vegetables anthracnose, strawberry anthracnose, rice Bakanae disease, rice blast, rapeseed sclerotinia, leaf spot, mushroom brown spot, apple anthracnose, pear scab, etc.
2. It has the effect of eradicating various diseases on field crops, fruits, vegetables, turf and ornamental plants;
3. Used in cereal crops (emulsifiable butter, 400-600g (a.i.)/ha) to control Pseudocercospora, Sclerotium, Coryspora and Septoria, and to treat early eye spot disease, leaf spot disease and Effective against powdery mildew;
4. Used on seeded grapes (500g/ha) to control Alternaria, Botrytis, Pseudocercospora, Sclerotinia and Sclerotinia;
5. Control Ascospora and Botrytis on leguminous plants, Cercospora and Powdery Mildew on sugar beets;
6. Seed treatment (0.2~0.5g/kg) has a preventive and curative effect on diseases caused by Trichosporon, Fusarium, Sclerotium and Septoria on cereal crops.
Application areas of prochloraz (67747-09-5)
Propiconazole prochloraz is the current effective agent for preventing and treating pear scab. After the pear trees wither their flowers, start spraying 40% EC 8000-10000 times solution as soon as the diseased buds are seen, and then spray it every 15-20 days according to rainfall conditions. 1 time, spray 5-7 times in total, or use alternately with other fungicides.
Propiconazole prochloraz has a strong inhibitory effect on apple ring rot disease. To prevent and control apple and pear ring rot disease in the field, you can try 40% EC 8000 times liquid spray.
To prevent and treat cucumber scab, start at the early stage of the disease. Use 7.5 to 12.5 ml of 40% EC per mu, and spray it with water regularly; or spray 40% EC at 8000-10000 times, once every 7-10 days. , spray 3 to 4 times in a row.
To prevent and control tobacco brown spot disease and vegetable powdery mildew, spray 40% EC 6000-8000 times at the early stage of the disease, once every 5-7 days, and spray 3-4 times continuously.
To prevent and control powdery mildew of medicinal plants such as chrysanthemum, mint, plantain, bindweed, and dandelion, as well as safflower rust, spray 40% EC 9,000-10,000 times at the early stage of the disease, and spray once every 7-10 days.
It can prevent and control many diseases of cereal crops, field crops, fruit trees, vegetables, etc.
The fungicide prochloraz is a broad-spectrum fungicide. It inhibits ergosterol biosynthesis, has protective and eradication effects, and has significant control effects on ascomycete and deuteromycete diseases in various crops. It can be used to prevent and control many diseases on the stems, leaves and ears of cereal crops, such as powdery mildew and leaf spot. The concentration used for seed treatment is 200~400mg active ingredient/L, and the foliar spraying is 0.3~1.0kg/m2. This product can also be used for many pathogenic bacteria of fruit trees, vegetables, mushrooms, turf and ornamental plants. Fruit trees and vegetables should be sprayed before harvest. The recommended concentration is 20~50g/100L. The dosage for storage and dipping after harvest is 250~1000mg/L. Can be mixed with a variety of fungicides, insecticides and herbicides.
Prochloraz (67747-09-5) Application
Application 1. CN201010003848.1 discloses a bactericidal composition containing polyantimycin and prochloraz, which contains two active ingredients: polyantimycin and prochloraz. The prochloraz is a manganese salt, a zinc salt or a copper salt. Salt, the weight ratio of polymycin and prochloraz is 80:1~1:80. The weight ratio of polymycin and prochloraz is 1:45~3:1. The cumulative weight percentage of polymycin and prochloraz accounts for 3% to 60% by weight. The bactericidal composition containing polyantimycin and prochloraz can be made into different application dosage forms, including microemulsions, aqueous emulsions, suspensions, wettable powders or water-dispersible granules. The bactericidal composition containing polyantimycin and prochloraz of the present invention has good compound synergy, delays drug resistance, has obvious synergistic effect, expands the bactericidal spectrum, reduces the use cost, and has good safety.
Application 2. CN201310048832.6 discloses a new dosage form containing prochloraz and its processing method and application, which belongs to the field of pesticide production and processing technology. A new dosage form ZW containing prochloraz. This dosage form is a microcapsule suspension-water emulsion formed by mixing prochloraz microcapsule suspension and prochloraz aqueous emulsion. It is composed of the following components in mass percentage: 1%~60% prochloraz, 1%~25% solvent, 1%~20% capsule, 1%~10% surfactant, 0.5%~10% antifreeze, 0.01%~3% thickener , 0%~5% pH adjuster, 0.01%~1% defoaming agent, 0.01%~1% preservative, the balance is water. The invention also provides the application of the new prochloraz-containing dosage form in the field of agricultural fungal disease prevention and control. The preparation reduces the use of organic solvents, reduces environmental harm, has good quick-acting and long-lasting effects, stable performance, and is easy to use.
Prochloraz (67747-09-5) prevention and control targets
The fungicide prochloraz controls rice diseases
1. For rice bakanae disease, the seed soaking method is used. In the Yangtze River Basin and areas south of the Yangtze River, soak the seeds with 2000-3000 times of 25% EC for 1-2 days, remove them and use clean water to accelerate germination. In the Yellow River Basin and areas north of the Yellow River, soak the seeds with 3000-4000 times of 25% EC for 3-5 days, remove them and use clean water to accelerate germination. In the Northeast region, soak the seeds in 25% EC solution 3000-5000 times for 5-7 days, then take them out for germination. This seed soaking method can also prevent and cure flax spot.
2. The fungicide prochloraz is used to control rice blast. Use 60-100 ml of 25% EC per mu and spray the water regularly. Spraying 250-1000 mg/L liquid on rice plants after harvest can effectively prevent and treat seriously infected rice blast.
Prevention and Control of Wheat Head Blight
Wheat scab is a fungal disease that mainly damages wheat ears. The pathogen infects wheat during the flowering stage, causing some spikelets to die, some in the middle and some in the upper part. This is related to the flowering habit of wheat. In wet weather, the fungus can spread to all the spikelets, turning them yellow-brown or withered, and a pink mold layer will appear at the base of the spikelets or at the seams of the chaff, so it is also commonly known as red wheat head.
Prochloraz (67747-09-5) use
It is advisable to dilute the fungicide prochloraz 1500 times and spray it on the foliage so that the plants can be medicated without dripping. Spray three times with an interval of 10-15 days to obtain the control effect.
If prochloraz forms a complex with divalent manganese, it can not only maintain the original activity of the agent, but also increase the effectiveness of the agent on crops.
Prochlorazole and flusilazole are mixed according to a certain scientific proportion, such as 20% silazole·prochlorazole (Qingdao Haohan Hi-Tech), which is used to prevent and control scab, powdery mildew, leaf spot, and rust in a variety of fruit trees, vegetables and other crops. , anthracnose, black spot, black pox, vine blight, leaf blight, red star and other diseases.
Mixing prochloraz and carbendazim (10 to 2.66 mg/L) has a significant synergistic effect and can avoid the occurrence of leaf spot blight in artificially inoculated wheat, but the two agents alone are ineffective.
1. Dilute the foliar spray 1500 times to fully coat the plants without dripping. Spray three times with an interval of 10-15 days to obtain the best control effect.
2. It has the effect of treating and eradicating various diseases on field crops, fruits, vegetables, turf and ornamental plants.
3. Used in cereal crops (emulsifiable butter, 400-600g (a.i.)/ha) to prevent and control fungi of the genus Pseudocercospora, Sclerotium, Coralspora and Septoria, and to treat early eye spot and leaf spot diseases. Effective against powdery mildew; used on seeded grapes (500g/ha) to control Alternaria, Botrytis, Pseudocercospora, Sclerotinia and Sclerotinia fungi; and control shells on leguminous plants. Dispora, Botrytis, Cercospora and Powdery mildew on sugar beets; seed treatment (0.2-0.5g/kg) is effective for Trichosporon, Fusarium, Sclerotinia, Diseases caused by Septoria can be prevented and cured; the general dosage for spraying fruits and vegetables before harvest is 20-50g/100L, and spraying 250-1000mg/L liquid on rice plants after harvest can effectively prevent and treat serious diseases. Infected rice with blast disease.
4. If prochloraz forms a complex with divalent manganese, it can not only maintain the original activity of the agent, but also increase the safety of the agent to crops.
5. Prochlorazole and flusilazole are mixed according to a certain scientific proportion. For example, 20% silazole·prochlorazole is used to control scab, powdery mildew, leaf spot, rust, and anthracnose in a variety of fruit trees, vegetables and other crops. , black spot, black pox, vine blight, leaf blight, red star and other diseases.
6. Mixing prochloraz and carbendazim (10 to 2.66 mg/L) has a significant synergistic effect and can avoid the occurrence of leaf spot blight in artificially inoculated wheat, but the two agents alone are ineffective.
How to use prochloraz (67747-09-5) to prevent and treat fruit tree diseases
1. The fungicide prochloraz prevents and controls pedicle rot, penicillium, green mold, and anthracnose during the storage period of citrus fruits. After harvesting, soak the fruits with 45% prochloraz water emulsion 500-1000 times for 2 minutes. Pick up, dry and store. Single fruit packaging, the effect is better.
2. The fungicide prochloraz prevents anthracnose and crown rot of banana fruits. After harvesting, soak the fruits with 800 times of 45% prochloraz water emulsion for 2 minutes before storing.
3. The fungicide prochloraz controls mango anthracnose. For prevention and control during the growth period, spray 45% prochloraz aqueous emulsion 500-1000 times, once each at the bud stage and the first flowering stage, then once every 7 days, and again 10 days before fruit picking, for a total of 5 sprays -6 times.
4. The fungicide prochloraz is used to prevent and control lychee black rot during storage. Soak the fruits with 1500-2000 times of 45% prochloraz water emulsion for 1 minute before storing.
5. The fungicide prochloraz is used to soak the harvested apple, pear, and peach fruits 1,000 times with 45% prochloraz aqueous emulsion for 1-2 minutes. It can prevent and treat penicillium, green mold, and brown rot, and prolong the fruit production. Shelf. It is very effective in preventing and controlling fruit rot caused by mold core fungi.
6. Use the fungicide prochloraz to prevent and treat grape black pox. Use 60-80 ml of 45% prochloraz aqueous emulsion per mu, and spray 90 pounds of water with regular spray.
Prochloraz (67747-09-5) cannot be used on what crops
Basically all crops can be controlled with prochloraz.
It can prevent and control anthracnose and leaf spot on fruits and vegetables. It can also prevent and control rice bakanae disease, rice blast, etc. Citrus anthracnose, stem rot, penicillium, green mold, banana anthracnose, leaf spot, mango anthracnose, peanut leaf spot, pepper, eggplant, melon, tomato and other vegetables anthracnose, strawberry anthracnose, Rapeseed sclerotinia, leaf spot, mushroom brown spot, apple anthracnose, pear scab, etc.
How to avoid resistance to prochloraz (67747-09-5)
With the use of If probiotic forms a complex with divalent manganese, it can not only maintain the original activity of the agent, but also increase the effectiveness of the agent on crops.
Prochlorazole and flusilazole are mixed according to a certain scientific proportion. For example, 20% of prochlorazole·prochlorazole is used to control scab, powdery mildew, leaf spot, rust, anthracnose, and black spot in a variety of fruit trees, vegetables and other crops. Spot, black pox, vine blight, leaf blight, red star and other diseases.
Mixing prochloraz and carbendazim (10 to 2.66 mg/L) has a significant synergistic effect and can avoid the occurrence of leaf spot blight in artificially inoculated wheat, but the two agents alone are ineffective.
In addition, the mixture also has a synergistic effect on preventing eye spot disease and powdery mildew in cereal crops.
The difference between prochloraz manganese salt and prochloraz (67747-09-5)
Prochloraz manganese salt, also called prochloraz manganese complex, is a compound of prochloraz and manganese chloride. Its disease prevention properties are very similar to prochloraz. Prochloraz manganese salt also works by inhibiting the biosynthesis of sterols. It has a systemic conduction effect in plants and has excellent control effect against various diseases caused by ascomycetes and deuteromycetes. Prochloraz manganese salt has multiple functions such as systemic absorption, conduction, prevention, protection, and treatment.
Prochloraz mainly interferes with the cell wall of pathogenic bacteria by inhibiting the biosynthesis of sterols, and has special effects on a variety of plant diseases caused by ascomycetes. It can also prevent and treat rice blast, bacanae, mushroom brown spot, and oleracea. Sclerotium and various crop anthracnose. It has a certain conductive effect. When the agent enters the soil through seed treatment, it is mainly degraded into volatile metabolites, which are easily adsorbed by soil particles and are not easily washed away by rainwater. This medicine has low toxicity to other soil organisms in the soil, but has an inhibitory effect on some soil fungi.
Both prochloraz and manganese salt of prochloraz belong to the imidazole fungicides. In actual agricultural production, the scope and effect of prochloraz and prochloraz manganese salt on disease control are basically the same. The difference between the two is:
1. Relatively speaking, the bactericidal activity of prochloraz manganese salt is higher than that of prochloraz, which means that the control effect on plant diseases will be better, because manganese salt is added to prochloraz manganese salt, which can better Promote photosynthesis, improve metabolism, increase sugar content, and significantly improve quality.
2. In terms of safety, prochloraz manganese salt is safer and is suitable for crops that are prone to phytotoxicity when using prochloraz emulsifiable concentrate.
What diseases does prochloraz manganese salt prevent?
At present, single-dose registrations of prochloraz manganese salt include 25%, 50%, and 60% wettable powders. The specific prevention and treatment methods and usage methods are as follows:
1. To prevent and control anthracnose of bell peppers and cucumbers, use 40-75 grams of 50% wettable powder or 80-150 grams of 25% wettable powder per mu, and spray water regularly.
2. To prevent and control citrus penicillium, green mold, anthracnose, stem rot and other diseases during storage, soak the fruits with 1000-2000 times of 50% wettable powder for 1-2 minutes on the day of picking, then pick them up and dry them at room temperature. Storage. Single fruit packaging, teaching fruit is better.
3. After harvesting apples, pears and peaches, soak the fruits with 1000-1500 times of 50% wettable powder for 1-2 minutes, take them out to dry and then pack them into boxes to prevent and control penicillium, green mold and peach black mold. , brown rot.
4. Prevention and treatment of mango anthracnose. For prevention and control during the growth period, use 50% wettable powder 1000-2000 times liquid mist, spray once each during the budding stage and the first flowering stage, then spray once every 7 days, and spray once again 10 days before fruit picking, for a total of 5- 6 times. To prevent corrosion and preserve freshness during the storage period, soak the fruits with 500-1000 times of 50% wettable powder for 1-2 minutes on the day of picking, remove and dry, and store at room temperature. Single fruit packaging, the effect is better.
What diseases can prochloraz prevent and cure?
At present, there are many registered contents and dosage forms of prochloraz single dose: 25%, 45% emulsifiable concentrate, 45% microemulsion, 50%, 60% wettable powder, 10%, 20%, 25%, 45% water emulsion, 50% % suspending agent, etc. Tests have shown that it is effective against sclerotinia sclerotiorum, rice ear blast, stripe leaf blight and bakanae disease, banana leaf spot, peanut brown spot, watermelon vine blight, citrus storage and preservation, tulip bulb rot, grape It has obvious effects on diseases such as gray mold, black bean disease, and tobacco brown spot.
Fruit tree diseases, used for fruit preservation and preservation:
(1) Prevention and treatment of mango anthracnose. For prevention and control during the growth period, spray 25% EC 500-1000 times, once each during the bud stage and the first flowering stage, then once every 7 days, and again 10 days before fruit picking, for a total of 5-6 times.
Preservation and preservation during the storage period. On the day of harvest, soak the fruits in 250-500 times of 25% EC for 1-2 minutes, pick them up and dry them, and store them at room temperature. If it can be packaged individually, the effect will be better.
(2) To prevent and control citrus fruit stem rot, penicillium, green mold, and anthracnose during storage, soak the fruits with 500-1000 times of 25% EC for 2 minutes after harvest, pick them up, dry them, and store them. . Single fruit packaging, the effect is better.
(3) To prevent black rot of lychees during storage, soak the fruits with 1500-2000 times of 45% EC for 1 minute before storing.
(4) Soak the harvested apple, pear, and peach fruits with 25% EC 1000 times for 1-2 minutes to prevent and treat penicillium, green mold, and brown rot, and extend the shelf life of the fruits.
(5) To prevent anthracnose and crown rot of banana fruits, soak the fruits with 450-900 times of 45% water emulsion for 2 minutes after harvesting and then store.
2. To prevent and control rice bakanae disease, use seed soaking method:
In the Yangtze River Basin and areas south of the Yangtze River, soak the seeds with 2000-3000 times of 25% EC for 1-2 days, remove them and use clean water to accelerate germination. In the Yellow River Basin and areas north of the Yellow River, soak the seeds with 3000-4000 times of 25% EC for 3-5 days, remove them and use clean water to accelerate germination.
To prevent and control rice blast, apply 60-100 ml of 25% EC per mu and spray the water regularly.
3. Prevention and treatment of wheat scab:
Use 53-67 ml of 25% EC per mu, and spray it regularly with water. It can also treat root rot in the ears and leaves and various leaf blight diseases.
4. Prevent and treat beet brown spot disease:
Use 80 ml of 25% emulsifiable concentrate per mu, spray regularly with water, spray once every 10 days, spray 2-3 times in total.
Before sowing, soak the seeds with 800-1000 times of 25% emulsifiable oil and spray 150 ml of water once per mu during the root expansion stage to increase production and income.
Precautions for prochloraz (67747-09-5)
1. The interval between prochloraz and prochloraz is 7 days, and the pesticide should be applied 2-3 times per crop season.
2. Control the storage room temperature and humidity, and do a good job of ventilation and work in the storage room.
3. When using this product to treat fruits, the drug should be used on the day of harvest.
4. The thickness of the stacked fruits should not exceed 30 centimeters, and single fruits should be packaged for better results.
5. This product is toxic to fish and should not pollute fish ponds, rivers or ditches.
6. Wear protective equipment when using, and wash hands and face after use.
Fungicide prochloraz (67747-09-5) price
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