Chlorothalonil is a broad-spectrum, protective fungicide. It has no systemic conduction effect, but after being sprayed on the plant body, it can have good adhesion on the surface and is not easily washed away by rain, so the efficacy period is long. It is a must-have medicine for roses. It is used to prevent and treat various fungal diseases such as black spot, brown spot, rust, powdery mildew, downy mildew, gray mold, anthracnose, leaf blight, leaf scorch, black spot, leaf shrinkage, perforation, etc. It is simply omnipotent.
Main dosage forms: 40% suspension, 50%, 75% wettable powder, 75% water-dispersible granules, 10% oil, 5%, 25% granules, 2.5%, 10%, 30%, 45% smoke agent, 5% powder.
Usage and dosage: (75% WP)
Spray, dilute 500-800 times, depending on the occurrence of the disease, apply the medicine once every 7 days or so, and can be used continuously for 2-3 times. Spray evenly when applying. Because it is a protective fungicide, it is equivalent to forming a protective film on the surface of the plant, so every leaf and branch must be evenly covered, especially the back of the leaves.
The most fundamental mechanism of the bactericidal and disease-curing effect of chlorothalonil is to destroy the metabolic mechanism of plant pathogens, so that pathogenic cells cannot metabolize normally and die. It has a good preventive effect on many fungi, and the agent has strong adhesion and is resistant to rain erosion, and the efficacy is long-lasting.
Chlorothalonil can be used on various vegetables, such as early blight, late blight, gray mold on potatoes, rust, gray mold and anthracnose on beans, gray mold, downy mildew, leaf spot on Chinese cabbage, anthracnose, powdery mildew, downy mildew, black pox, fruit rot on grapes, brown rot, scab, leaf shrinkage, perforation, sand bark on fruit trees such as pears and peaches, and anthracnose, downy mildew, powdery mildew on fruits and vegetables.
The best compound formula of chlorothalonil in production:
1. "Superposition" formula of chlorothalonil's efficacy:
That is, the compound use of drugs with similar or identical effects can produce a "superposition" effect of drug efficacy. Such formulas include chlorothalonil + mancozeb, chlorothalonil + sulfur, chlorothalonil + thiram, etc.
Because chlorothalonil only has a protective effect but no systemic conduction effect, the "superposition" drugs are also some drugs that only have a "protective effect" but no "systemic treatment" eradication effect. However, after "superposition", the efficacy of the medicine is significantly enhanced, and some medicines have also extended the scope of disease prevention, which is in line with the rules of "superposition" and compound use of pesticides.
2. "Synergistic" formula of chlorothalonil efficacy:
That is, the medicines with different chemical structures and different mechanisms of action are compounded and used together to have a "synergistic" effect (the efficacy of the mixed medicine is greater than that of a single dose).
Such formulas include chlorothalonil + Iprodione, chlorothalonil + metalaxyl, chlorothalonil + cymoxanil, chlorothalonil + phosethy-Al, chlorothalonil + dimethomorph, chlorothalonil + Propamocarb, chlorothalonil + azoxystrobin, etc.
3. "Complementary" formula of chlorothalonil efficacy:
That is, the medicines with different chemical structures and "complementary" mechanisms of action are compounded and used to achieve the perfect effect of medication.
Such as thiophanate-methyl + methyl thiophanate, thiophanate-methyl + metalaxyl-M, thiophanate-methyl + mandipropamid, etc.
