Elanco Animal Health CyLence Pour-On Insecticide
Last reviewed: December 2025
Fourth-generation pyrethroid pour-on insecticide for control of horn flies, face flies, and lice on beef and dairy cattle with zero milk and meat withdrawal.
CyLence Pour-On Insecticide from Elanco (formerly Bayer) contains cyfluthrin, a fourth-generation synthetic pyrethroid that provides powerful, long-lasting control of horn flies, face flies, biting lice, and sucking lice on cattle.
The product's key advantage for dairy producers is zero withdrawal time for both milk and meat, allowing treatment of lactating cows without discarding milk. This makes it ideal for dairies needing fly control during peak production periods.
CyLence is ready-to-use with no mixing required, rain-fast once dry, and can be applied year-round including during cold weather when lice populations are highest.
Key Features
- Zero Withdrawal: No milk or meat withdrawal period - safe for lactating dairy cattle
- Long-Lasting Control: Controls flies for up to 3 weeks per application
- Lice Control: Effective against both biting and sucking lice with two treatments
- Ready-to-Use: No mixing required - apply directly from container
- All Ages: Can be used on cattle of any age including calves
Advanced Features
- Rain-Fast Formula: Oil-based formulation resists wash-off once dried
- Cold Weather Use: Effective application during winter months for lice control
- Multi-Species: Also labeled for use on horses and swine
- Visual Confirmation: Applied along topline for easy verification of treated animals
Ideal For
Farm Types: Dairy farms, Beef operations, Cow-calf operations, Feedlots
Competitive Advantages
What sets CyLence Pour-On Insecticide apart from alternatives:
- Zero milk withdrawal - unique among many fly control products
- Fourth-generation pyrethroid with excellent efficacy
- Ready-to-use convenience saves labor time
- Controls multiple pest species with one product
- Long residual activity reduces application frequency
Pricing Information
Here is the pricing information for CyLence Pour-On Insecticide:
Sold in pint and gallon containers through agricultural retailers
Pricing Model: per-unit
Price varies by retailer. Volume discounts available.
Pros & Considerations
- Pour-on fly and lice control
- Easy application
- Convenient packaging
- Multiple pest control
- Known efficacy
- Temporary control only
- Resistance concerns
- Must follow label
- Environmental considerations
Implementation & Setup
How to implement CyLence Pour-On Insecticide on your dairy operation:
Implementation Timeline: Immediate use upon purchase
Training & Support
Training and support options available for CyLence Pour-On Insecticide:
Support Channels:
Evaluation Questions
Key questions to consider when evaluating CyLence Pour-On Insecticide:
- What is your primary fly problem - horn flies, face flies, or stable flies?
- Do you need zero-withdrawal products for lactating cattle?
- What is your current fly control rotation strategy?
- Have you experienced resistance issues with other pyrethroids?
- How many cattle will you be treating?