This systematic green management plan for potatoes focuses on addressing three core challenges: Late Blight, soil-borne pests, and seed piece degeneration.

1. Biological Disease Management (Late Blight & Scab)

• Late Blight (Phytophthora infestans):
  • Antagonistic Bacteria: Apply Bacillus subtilis or Bacillus amyloliquefaciens foliar sprays before or at the onset of disease. These beneficial microbes create a protective bio-barrier on leaves to inhibit pathogen germination.
  • Biopesticides: Utilize botanical fungicides such as Eugenol and Berberine, or the microbial antibiotic Kasugamycin.
• Common Scab & Black Scurf (Soil-borne):
  • Seed Treatment: Treat seed potatoes with Trichoderma or Paenibacillus polymyxa (via dipping or dressing) before planting to minimize soil-borne infections.
  • Bio-organic Fertilizer: Incorporate organic fertilizers enriched with specific antagonistic microbes to optimize the tuber growth environment.

2. Biological Pest Control

• Potato Tuber Moth (Phthorimaea operculella):
  • Pheromone Traps: Deploy sex pheromone traps in both fields and storage facilities to disrupt mating and mass-trap adults.
  • Viral/Microbial Agents: Apply Granulovirus (GV) or Bacillus thuringiensis (Bt) specifically targeting the larval stage.
• Soil Pests (Grubs & Wireworms):
  • Entomopathogenic Fungi: Integrate Metarhizium or Beauveria bassiana granules into the soil during land preparation or hilling to induce lethal infections in pests.
  • Entomopathogenic Nematodes: Release predatory nematodes like Steinernema to actively hunt and attack larvae underground.
  • Root-knot nematodes: PAECILOMYCES LILACINUS，the most widely used biological species for controlling root-knot nematodes, significantly reducing gall formation on roots.
• Aphids (Virus Vectors):
  • Natural Enemies: Protect or release biological control agents such as Aphidius wasps, ladybugs, or lacewings.

3. Soil & Seed Piece Management

• Certified Virus-Free Seeds: Using virus-free seed potatoes is the foundation of biological control, cutting off the transmission of multiple viral diseases at the source.
• Bio-elicitors: Spray Amino-oligosaccharins (Chitosan oligosaccharides) to activate the potato’s innate immune system, enhancing resistance to Late Blight and viruses.

4. Agro-ecological Regulation

• Crop Rotation: Avoid continuous cropping with other Solanaceous plants (e.g., tomatoes, peppers). Rotating with Gramineous crops (wheat, corn) effectively breaks the life cycle of specialized pests and pathogens.
• Physical Barriers: For greenhouse cultivation, install 60-mesh (or finer) insect-proof netting to block aphids and migratory pests.