PVP functions as a plant protectant primarily through the following mechanisms:
As Pesticide Carrier
• Forms stable complexes with pesticides to:
- Enhance pesticide adhesion on plant surfaces
- Reduce wash-off by rainwater
- Prolong pesticide efficacy
• Serves as controlled-release agent:
- Enables gradual pesticide release
- Reduces application frequency
- Decreases environmental contamination
Plant Stress Resistance Enhancement
• Creates protective hydrophilic film on plants:
- Reduces water loss (improves drought resistance)
- Provides physical barrier against pathogens/pests
• May participate in physiological regulation:
- Strengthens plant stress tolerance
- Improves resistance to:
* Drought
* High/low temperature extremes
Nutrient Absorption Promotion
• Forms chelates with essential nutrients:
- Increases bioavailability of:
* Nitrogen (N)
* Phosphorus (P)
* Potassium (K)
• Improves fertilizer efficiency:
- Enhances nutrient uptake
- Boosts plant growth and yield
