I. Product Overview
Lentinan is a natural β-glucan biological formulation derived from Lentinula edodes (Shiitake mushroom) mycelia. Characterized by its potent immunomodulatory and antiviral activities, it is widely utilized in sustainable agriculture as a plant immune inducer (elicitor).
Mode of Action
- Virus Inactivation: Directly deactivates and denatures virus particles.
- Replication Inhibition: Suppresses viral RNA replication within host cells.
- Immune Activation: Elicits the plant’s systemic acquired resistance (SAR).
- Growth Promotion: Accelerates protein synthesis and cellular repair, delivering dual preventive and therapeutic benefits.
II. Core Application Technology
(A) Application Methods and Dosages
| Crop Type | Target Disease | Application Method | Optimal Timing |
|---|---|---|---|
| Tomato | Viral Diseases | Foliar Spray | Seedling stage or onset of disease. Apply 4 consecutive times at 7–10 day intervals. |
| Tobacco | Viral Diseases | Foliar Spray | Starting 10–15 days post-transplantation. Apply 2–3 consecutive times. |
| Rice | Rice Stripe Virus | Foliar Spray | Tiller stage and heading stage. |
| Cucumber | Cucumber Mosaic Virus | Foliar Spray | From post-transplantation recovery (slow-seedling phase) to fruiting stage. |
(B) Key Operational Guidelines
- Application Timing: Must be applied proactively (prior to outbreak) or at the very early stage of disease onset. Apply during early morning or late afternoon to avoid high temperatures and intense sunlight, which degrade the active biological compounds.
- Tank-Mix Incompatibilities: DO NOT mix with alkaline pesticides, copper-based fungicides, or Vitamin A. For enhanced synergistic efficacy, co-application with amino oligosaccharins or brassinosteroids is highly recommended.
- Special Treatment Protocols:
- Seed Treatment: Soak seeds in a 600× diluted solution for 30 minutes to boost germination rates and seedling vigor.
- Root Drenching: Drench roots with a 600× diluted solution after seedling separation to enhance root system vitality.
- Abiotic Stress Mitigation: Tank-mix with premium foliar fertilizers to significantly improve crop tolerance to cold stress (e.g., during the cucumber seedling stage).
III. Target Pathogens and Crop Spectrum
(A) Primary Target Pathogens
- Viral Pathogens: Tobacco Mosaic Virus (TMV), Tomato Yellow Leaf Curl Virus (TYLCV), Cucumber Mosaic Virus (CMV), Rice Stripe Virus (RSV), etc.
- Other Pathogens: Potato Scab (Streptomyces scabies), Wheat Sharp Eyespot (Rhizoctonia cerealis), and Asparagus Stem Blight (Phomopsis asparagi) via induced systemic resistance.
(B) Crop Adaptability Spectrum
- Field Crops: Rice, Wheat, Corn, Soybeans.
- Cash Crops: Tobacco, Potatoes, Cotton.
- Vegetable Crops: Tomatoes, Peppers, Cucumbers, Watermelons, Eggplants.
- Fruit Crops: Citrus, Grapes, Strawberries.
IV. Product Advantages and Precautions
(A) Core Advantages
- Eco-Safety: Extremely low toxicity with zero chemical residues (Acute Oral LD₅₀ in rats > 2500 mg/kg). Perfectly suited for certified green, organic, and export-oriented agricultural bases.
- Extended Residual Protection: Induced plant immunity persists for 14–21 days, drastically reducing the required frequency of synthetic chemical applications.
- Synergistic Compatibility: Mixing with synthetic chemistries like Pymetrozine or Tricyclazole expands the control spectrum against vector insects and fungal pathogens simultaneously.
- Yield & Quality Enhancement: Promotes protein synthesis and upgrades produce quality (e.g., improves flue-cured tobacco commercial grading by 1–2 levels).
(B) Precautions & Safety Measures
- If rainfall occurs within 24 hours post-application, a re-spray is required.
- Operators with known allergies must wear proper personal protective equipment (PPE), including protective clothing and gloves.
- Avoid application near sericulture (silkworm) farms and active honeybee foraging zones.
- Precipitation or sedimentation may occur in the formulation; shake well before use. This does not affect biological efficacy.
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