The use and precautions of the commonly used fungicide difenoconazole_Kain Industrial Additive

1. Common name:

difenoconazole

2. Product name:

Shigao, bifenconazole, etc.

3. Main dosage forms:

10%, 20%, 37% water-dispersible granules, 10%, 20% microemulsion, 5%, 10%, 20% water emulsion, 3%, 30g/L suspended seed coating agent, 25%, 250g/L emulsifiable concentrate, 3%, 10%, 30% suspending agent, 10%, 12% wettable powder. 3. Toxicity: Low toxicity (toxic to fish and aquatic life).

4. Mode of action

Difenoconazole water-dispersible granules are beige to brown fine particles. Difenoconazole has a strong inhibitory effect on the spore formation of plant pathogenic bacteria and can inhibit the maturation of conidia, thereby controlling the further development of the disease. The mode of action of difenoconazole is to inhibit the biosynthesis of ergosterol by interfering with the C14 demethylation of pathogenic bacterial cells, thereby causing sterol to remain in the cell membrane, damaging the physiological function of the membrane, and leading to the death of the fungus.

5. Product features

① Systemic conduction, broad bactericidal spectrum. Difenoconazole is a triazole fungicide. It is an efficient, safe, low-toxic, broad-spectrum fungicide that can be absorbed by plants and has strong penetration. Within 2 hours after application, it will be absorbed by crops and has the characteristics of upward conduction, which can protect the new young leaves, flowers and fruits from the damage of pathogenic bacteria. It can treat multiple diseases with one medicine and has good control effect on a variety of fungal diseases. It can effectively prevent and treat vegetable scab, leaf spot, powdery mildew and rust, and has both preventive and therapeutic effects.

② Resistant to rain erosion and long-lasting efficacy. The agent adhered to the leaf surface is resistant to rain erosion and has very little volatilization from the leaves. It also exhibits long-lasting bactericidal activity even under high temperature conditions, and is 3 to 4 times longer than ordinary fungicides. sky.

③Advanced formulation, safe for crops. Water-dispersible granules are composed of active ingredients, dispersants, wetting agents, disintegrants, defoaming agents, adhesives, anti-caking agents and other additives, through micronization, spray drying and other processes. Granulation. It can be quickly disintegrated and dispersed when put into water to form a highly suspended dispersion system with no dust impact and is safe for users and the environment. Contains no organic solvents and is safe for recommended crops.

④ Difenoconazole can be mixed with propiconazole, azoxystrobin and other fungicide ingredients to produce compound fungicides.

6. Application in vegetable production

Difenoconazole has good control effects on many higher fungal diseases. Mainly used to control powdery mildew, scab, leaf mold and other diseases

To prevent early potato blight, spray 50 to 80 grams of 10% difenoconazole water-dispersible granules per acre. The effect lasts for 7 to 14 days.

To prevent and control leaf spot, rust, anthracnose and powdery mildew on beans, cowpeas and other legumes, use 50 to 80 grams of 10% difenoconazole water-dispersible granules per acre. The duration of effect is 7 to 14 days. To prevent and treat anthrax, it is best to mix it with mancozeb or chlorothalonil.

To prevent and control pepper anthracnose, tomato leaf mold, leaf spot, powdery mildew, and early blight, start spraying when the lesions first appear, once every 10 days, and spray 2 to 4 times in a row. Generally, 60 to 80 grams of 10% difenoconazole water-dispersible granules, or 18 to 22 grams of 37% difenoconazole water-dispersible granules, or 250 g/L difenoconazole emulsifiable concentrate or 25% emulsifiable concentrate are used. 25~30ml, spray on 60~75kg of water.

To prevent and control eggplant brown spots, leaf spot, and powdery mildew, start spraying when the lesions first appear, once every 10 days, and spray 2 to 3 times in a row. Generally, 60 to 80 grams of 10% difenoconazole water-dispersible granules, or 18 to 22 grams of 37% difenoconazole water-dispersible granules, or 250 g/L difenoconazole emulsifiable concentrate or 25% emulsifiable concentrate are used. 25~30ml, spray on 60~75kg of water.

To prevent and control powdery mildew, anthracnose, and vine cutting disease on cucumbers and other melon vegetables, use 10% difenoconazole water-dispersible granules 1000 to 1500 times. The duration of effect is 7 to 14 days. Use 10% difenoconazole water-dispersible granules for 7 to 14 days. Face spray.

To prevent and control watermelon vine blight, use 50-80 grams of 10% difenoconazole water-dispersible granules per acre and spray 60-75 kg of water.

To prevent early blight, rust, purple spot, and black spot on garlic and onions, use 80 grams of 10% difenoconazole water-dispersible granules per acre and spray it with 60 to 75 kilograms of water. The duration of effect is 7 to 14 days. .

To prevent and control celery leaf spot, start spraying from the early stage of the disease, once every 7 to 10 days, and spray 2 to 4 times in a row. Generally, 40 to 50 grams of 10% difenoconazole water-dispersible granules, or 10 to 13 grams of 37% difenoconazole water-dispersible granules, or 250 g/L difenoconazole emulsifiable concentrate or 25% emulsifiable concentrate are used. 15~20ml, spray on 60~75kg of water.

To prevent and control black spot disease on cruciferous vegetables such as Chinese cabbage, start spraying from the early stage of the disease, spray once every 10 days, and spray about 2 times in a row. Generally, 40 to 50 grams of 10% difenoconazole water-dispersible granules, or 10 to 13 grams of 37% difenoconazole water-dispersible granules, or 250 g/L difenoconazole emulsifiable concentrate or 25% emulsifiable concentrate are used. 15~20ml, spray on 60~75kg of water.

To prevent and control garlic leaf blight, spray once in the early stages of the disease. Generally, 40 to 50 grams of 10% difenoconazole water-dispersible granules, or 10 to 13 grams of 37% difenoconazole water-dispersible granules, or 250 g/L difenoconazole emulsifiable concentrate or 25% emulsifiable concentrate are used. 15~20ml, spray on 60~75kg of water.

To prevent and control purple spot disease on green onions and onions, start spraying from the early stage of the disease, once every 10 to 15 days, and spray about 2 times in a row. Generally, 40 to 50 grams of 10% difenoconazole water-dispersible granules or 37% benzene is used.10 to 13 grams of difenoconazole water-dispersible granules, or 250 grams per liter of difenoconazole emulsifiable concentrate or 15 to 20 ml of 25% emulsifiable concentrate, sprayed on 60 to 75 kilograms of water.

To control strawberry powdery mildew, ring spot, leaf spot and black spot, and to treat other diseases, use 10% difenoconazole water-dispersible granules 2000-2500 times; to control strawberry anthracnose and brown spot When treating diseases and other diseases, use 10% difenoconazole water-dispersible granules 1500 to 2000 times the liquid; when mainly controlling strawberry gray mold and treating other diseases, use 10% difenoconazole water-dispersible granules. 1000~1500 times liquid. The dosage of liquid medicine varies according to the size of the strawberry plants. Generally, 40 to 66 liters of liquid medicine are used per acre. Appropriate period of application and interval of days: during the seedling cultivation period, from June to September, spray twice with an interval of 10 to 14 days; in the field period, before covering with film, spray once with an interval of 10 days; during the flowering and fruiting period, spray in the greenhouse 1 to 2 times, with an interval of 10 to 14 days.

To prevent large and small leaf spots of corn, spray 80 grams of 10% difenoconazole water-dispersible granules per acre, which lasts for 14 days.

To prevent and control asparagus stem blight, start spraying from the early stage of the disease, once every 10 days, and spray 2 to 4 times in a row, focusing on the base of the plant. Generally, use 37% difenoconazole water-dispersible granules 4000-5000 times liquid, or 250 g/L EC or 25% EC 2500-3000 times liquid, or 10% water-dispersible granules 1000-1500 times liquid spray.

7. Precautions

① It is particularly effective in preventing and controlling newly infected germs. Therefore, timely spraying of difenoconazole after rainfall can eradicate the primary source of bacteria and maximize the bactericidal characteristics of difenoconazole. This will play a very good role in controlling the development of diseases in the later stages of growth.

② Cannot be mixed with copper-containing agents. If it is indeed necessary to mix, the dosage of difenoconazole should be increased by 10%. It can be mixed with most pesticides, fungicides, etc., but a mixing test must be done before application to avoid negative reactions or phytotoxicity. Mixing with “Tianda 2116” can improve the efficacy and reduce the occurrence of phytotoxicity.

③In order to prevent bacteria from developing resistance to difenoconazole, it is recommended that difenoconazole should not be sprayed more than 4 times per growing season. It should be used alternately with other pesticides.

④In the early stage of the disease, use a low dose and a long interval; when the disease is severe, use a high dose and a short interval; in epidemic periods with lush plant growth, suitable temperature, high humidity, and lots of rain, use a high dose and a short interval. , increase the frequency of medication to ensure the effect of preventing disease and increasing production. It has no inhibitory effect on the growth of vegetables.

⑤ Toxic to fish, do not pollute water sources. Avoid storage below 10℃ and above 30℃.

⑥ Pay attention to safety protection when taking the medicine. If the medicine splashes into the eyes, immediately flush the eyes with water for at least 10 minutes; if swallowed by mistake, immediately send to the hospital for symptomatic treatment. There is no special antidote for this medicine. The remaining chemical liquid and washing wastewater must not pollute fish ponds, pools and water sources.

⑦ The safe interval on watermelons is 7 days, and the maximum number of uses per season is 3 times.