Carbendazim is a high-efficiency, low-toxic, broad-spectrum, systemic fungicide that is ineffective against diseases caused by oomycetes and bacteria. It has protective and therapeutic effects. It interferes with the formation of the spindle in the mitosis of pathogenic bacteria, affects cell division and plays a bactericidal role. Generally, the period of validity is 10 to 15 days. Under the rainy conditions, the effect period is about 7 days, which has a stimulating effect on plant growth and low toxicity to humans and animals.
Carbendazim can be widely used for prevention and control: wheat scab, rice blast / sheath blight, pear black spot, apple brown spot, grape black pox / white rot / anthracnose, tomato early blight, melon Powdery mildew, sugar beet brown spot, melon wilt, cotton seedling blight / anthracnose, peanut black spot, stem rot, sweet potato black spot, rose brown spot, Clivia leaf spot, orchid anthracnose, Leaf spot disease and so on.
Miscellaneous use of carbendazim
First, carbendazim mixed soil plays a role in sterilization
Carbendazim is a systemic drug that works in disease plants. Carbendazim is easily decomposed and decomposed in the soil, which is used during the onset of fungal fungi, and the initial mixed soil is very small.
For the prevention of pathogens in advance, chlorothalonil can be considered. In the initial use, it has good adhesion, and has a long potency and is also a low-toxic agent. Chlorothalonil is a contact agent that is deposited on the surface of plants and on the surface of the medium, and is killed or inhibited after contact with mold or the like. The chlorothalonil has a preventive and protective effect at the time of no onset and at the onset of the disease. Carbalamin is used in the mid-onset. Simply put, chlorothalonil is still not used, and carbendazim is used when it is ill.
Misunderstanding 2, carbendazim is applied to the wounds of plants to prevent infection.
The principle of carbendazim is to affect cell division and play a bactericidal role. It has no effect on wounds without symptoms, and it is better to dry. The principle of chlorothalonil is that some reactions occur, which destroys the metabolism of fungal cells and loses vitality.
Misunderstanding 3, carbendazim and methyl thiophanate / thiophanate / benomyl rotation, to avoid the weakening of efficacy due to drug resistance
Many treasure sellers will recommend buying the above two drugs to avoid drug resistance. In fact, thiophanate-methyl/methyl thiophanate/benzaldehyde and carbendazim have cross-resistance and should not be used as an agent for rotation with carbendazim (so-called cross-resistance refers to thiophanate-methyl/ Methyl thiophanate/ benomyl is metabolized to carbendazim in succulents, so if the plant is resistant to carbendazim, it is produced by thiophanate/methyl thiophanate/benzaldehyde. Drug resistance).
Therefore, you can buy some other fungicides, such as chlorothalonil. Compared with carbendazim, it has good adhesion. Therefore, the efficacy period is longer, and there is generally no emergence of drug resistance. After all, it is not used too frequently.
Long-term, large-scale, continuous use of the same formula (mixing ratio) of bactericidal drugs has long made bacterial fungi resistant, using carbendazim to spray leaves and carbendazim to root, this practice has long been changed As a "placebo", the effect of "sterilization" can be said to be smaller and smaller.
Use of carbendazim
1. Tomato early blight, melon powdery mildew, sugar beet brown spot
From the initial stage of the disease, use 50% wettable powder 800-1000 times liquid, spray control once every 7-10 days, even spray 3-5 times, can be prevented.
2, cucumber, watermelon and other melons transplanted before planting and control
Use 50% wettable powder 1-1.5 kg per acre, add 25-30 kg of fine soil and mix well, evenly spread in the planting ditch or hole, and then use 50% wettable powder 1000 times liquid to fill the root.
3, cotton seedling blight, anthracnose
Use 1 kg of 50% wettable powder, 10-20 kg of water, 100 kg of cotton mixed seed, sow 6 hours after sowing, or soak for 24 hours with 50% wettable powder 250 times, dry and sow.
4, peanut black spot, stem rot
Use 50% wettable powder 0.5-1 kg, peanut seed 100 kg, mix well and sown.
5, wheat scab
At the peak of wheat heading, spray with 50% wettable powder 500-1000 times, spray once every 5-7 days, spray 75-100 kg per acre.
6, rice sheath blight
50% wettable powder 500-1000 times solution was used to control each spray at the end of rice tillering and booting stage.
7, sweet potato black spot
Before transplanting, the base of the stem of the sweet potato was impregnated with 50% wettable powder 3000-4000 times for 5 minutes.
8, flowers
According to the incidence, spray with 50% wettable powder 500-1000 times, can control powdery mildew of various flowers and rose brown spot, Clivia leaf spot, orchid anthracnose, leaf spot and so on.
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