Deltamethrin 1.25% ULV is a widely used insecticide in India, formulated for ultra-low volume (ULV) application, primarily for controlling mosquitoes and other household pests, including cockroaches, bedbugs, and flies. 
Here's a more detailed breakdown:
What it is:
Active Ingredient: Deltamethrin, a synthetic pyrethroid insecticide. 
Formulation: 1.25% ULV (Ultra-Low Volume). 
Purpose: To control a wide range of household pests, including mosquitoes, cockroaches, bedbugs, and flies. 
Application: Suitable for both indoor and outdoor applications, particularly through thermal fogging or ULV spray equipment. 
Effect: Known for its quick knockdown effect, making it effective against malaria and dengue mosquitoes. 
Key Features and Benefits:
Broad Spectrum: Effective against a wide variety of pests. 
Quick Knockdown: Provides rapid control of target insects. 
Long-lasting: Has a residual effect, meaning it can continue to kill pests for a period after application. 
Cost-effective: A small amount of insecticide is needed for effective pest control. 
Target Pests:
Mosquitoes (including those that transmit malaria and dengue), Cockroaches, Bedbugs, Flies, and Other household pests. 
How it's Used:
Thermal Fogging:
The insecticide is mixed with a carrier fluid (like diesel or kerosene) and applied through a thermal fogging machine to create a fine mist that spreads throughout the area.
ULV Spraying:
The insecticide is mixed with a carrier fluid and applied using a ULV sprayer to create a fine mist.