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Fungicides Particularly Effective
May 31, 2017

Fungicides The main function of the protective fungicide is to form a layer of drug membrane on the surface of the plant after the drug is applied, so that germs cannot be invaded.

These fungicides are particularly effective for airflow-borne pathogens, such as downy mildew, which is used to prevent and control a variety of crops, and to Bordeaux plant seeds or seedlings. Can prevent and control the infection of seed-borne diseases, Fungicides such as the combination of triazole and ketone can prevent cereal smut; multi-bacterium ling dipped sweet potato seedling to control seedling disease; Thiram Double, carbendazim soil treatment can prevent and control many crops ' soil-borne diseases, such as quenching disease and erect blight.

Eradication of Fungicides

These fungicides have a direct and strong killing effect on pathogenic bacteria, but plants cannot tolerate such agents in plant growth period, Fungicides so they can only be used for soil treatment, plant dormancy or seedling treatment before sowing.

The common formaldehyde disinfection seed, the use of alcohol to wheat stripe rust, powdery mildew to eliminate the role of appropriate.

Therapeutic fungicides

After the plant feels sick, can be used some non-internal suction fungicides, such as direct killing of sulfur bacteria, or with infiltration of the bactericidal agent, infiltration into the plant tissue, kill the bacteria, or with the use of fungicides directly into the plant body, Fungicides with the plant body fluid transport conduction and play a therapeutic role in the bactericidal agent.

It is common to have Carbendazim, Tobzin, spring fungus, and the bacterium of dipyridamole.

Disease-resistant Activator

After treating the plant, the fungicide can induce disease resistance by identifying pathogenic bacteria, which is the disease-resistant activator of plant. However, this drug can not directly present bactericidal activity, but in the use of a few days after a longer time to disease resistance, it is not easy to produce resistance.

Common reagents are oxalic acid, Fungicides benzene and thiadiazole, allyl benzene thiazole.

Copper ions can inhibit the growth of bacteria and fungi, so a lot of antimicrobial pesticides contain copper elements. The earliest use of copper preparations as fungicides was in 1885, now more than 200 years old. In the past more than 200 years, sales of copper preparations have been growing steadily. Especially since 2009, the copper disinfectant has been stable in the global fungicide sales of the top six, Fungicides known as the world's sixth largest fungicide, global sales far higher than the alcohol, fluconazole, hundred bacteria and other fungicides varieties.

Depending on the acidification of the surface water of the plant, the copper ions are gradually released and the protein of the pathogen is combined to kill the protease degeneration and inhibit the germination and mycelial development of the pathogen. As a broad-spectrum bactericide, the copper preparation has a prominent control effect on the bacterial diseases of many crops, such as rice bacterial stripe disease, Libai blight, rice basal rot, citrus canker disease, cucumber bacterial spot disease, cotton angular spot disease, Fungicides melon fillet disease, garlic leaf blight, cabbage rot, peanut wilt disease, tobacco wilt disease, tobacco wildfire disease, ginger ginger plague, flower seedlings bacterial disease, peach tree bacterial perforation disease. At the same time, some fungal diseases such as Apple brown spot, grape downy mildew, mango leaf spot, etc. have preventive function.