Diflubenzuron drying
Diflubenzuron drying refers to a critical step in the formulation process of the insecticide Diflubenzuron, or the period after its application where the residue dries on treated surfaces. Common drying method:Air dryer.
Diflubenzuron drying refers to a critical step in the formulation process of the insecticide Diflubenzuron, or the period after its application where the residue dries on treated surfaces. This process significantly impacts the chemical's stability, efficacy, and environmental behavior.
Purpose of Drying (Manufacturing):
During production (e.g., for Wettable Powders - WP or Water-Dispersible Granules - WDG), drying removes residual solvents or water after synthesis or granulation.
Achieves the desired low moisture content (<1-2%), crucial for:
Stability: Prevents degradation, caking, and microbial growth.
Flowability: Ensures the powder or granules handle and disperse correctly.
Shelf Life: Maintains potency and physical properties over time.
Drying After Application:
Once sprayed (e.g., on crops, water bodies for mosquito control, or timber), the Diflubenzuron suspension or solution must dry on the target surface.
This drying phase is vital because:
Rainfastness: The dried residue is generally more resistant to being washed off by rain or irrigation.
Ingestion by Target Pests: Insects (larvae) primarily ingest Diflubenzuron by feeding on treated surfaces. A dry residue ensures contact and consumption.
Persistence: Drying helps the residue adhere, prolonging its availability to affect molting insects.
Reduced Drift/Volatilization: Minimizes movement away from the target area once dry.
Common drying method:
Air dryer: The principle of instant drying is adopted, and the rapid movement of hot air is used to drive the wet materials, so that the wet materials are suspended in the hot air. This strengthens the entire drying process and increases the rate of heat and mass transfer. The non-bound moisture of the materials dried by air flow can be almost completely removed.
