Primary rodenticide chemistries: Acute vs chronic anticoagulants
Rodent management relies on two distinct chemical modes of toxicity tailored to field burrows and storage godowns.
- Zinc Phosphide (80% technical/powder): Acute single-dose rodenticide that reacts with stomach hydrochloric acid to release lethal phosphine gas.
- Bromadiolone (0.005% cake/bait): Second-generation anticoagulant that blocks vitamin K recycling, preventing blood clotting enzymes.
- Bait shyness prevention: Rodents do not develop bait shyness with Bromadiolone because symptoms develop slowly over 3 to 7 days.
- High acute lethality: Zinc Phosphide provides swift mortality within hours but requires careful pre-baiting to avoid bait aversion.
Strategic bait preparation and field baiting procedure
Effective rodent management requires systematic preparation and placement along active burrows and runways.
- Identify active burrows: Close all burrow entrances with moist soil; reopen burrows the next morning to identify active tunnels.
- Pre-baiting (for Zinc Phosphide): Place plain roasted grain or broken wheat mixed with edible oil for two consecutive days.
- Poison baiting: On the third day, mix Zinc Phosphide into the edible bait and place small portions deep inside active burrow mouths.
- Bromadiolone bait blocks: Secure paraffin wax cakes inside tamper-resistant bait stations along field bunds and godown walls.
Safety protocols, non-target protection, and medical antidote
Because rodenticides present severe accidental poisoning hazards to livestock, dogs, birds, and children, strict precautions are mandatory. Never place loose bait in open accessible areas; use protective gloves during bait handling. For anticoagulant poisoning (Bromadiolone), Vitamin K1 (Phytomenadione) administered under medical supervision serves as the specific physiological antidote.
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Central Insecticides Board and Registration Committee ↗Related on KisanPe
Common questions
What is the difference between Zinc Phosphide and Bromadiolone rat bait?
Zinc Phosphide is a fast-acting acute poison releasing phosphine gas, while Bromadiolone is a slow-acting anticoagulant that causes fatal internal bleeding.
Why is pre-baiting mandatory before using Zinc Phosphide?
Pre-baiting with unpoisoned grain builds rodent trust and ensures all rats consume a lethal dose simultaneously, preventing bait shyness.
What is the medical antidote for accidental Bromadiolone poisoning?
Vitamin K1 (Phytomenadione) administered by a qualified medical professional is the specific antidote for anticoagulant toxicity.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
More Crop Protection & Pesticides guides
Ask Sakhi AI in your language, check live mandi prices or plan a loan with KisanPe tools.