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Description
Merck ULTRA BOSS® Pour-On InsecticideULTRA BOSS POUR ON INSECTICIDE features broad spectrum control in a pour on. Containing 5% permethrin and 5% piperonyl butoxide, ULTRA BOSS POUR ON INSECTICIDE controls lice, flies and more in lactating and non lactating dairy cattle, beef cattle and calves. About ULTRA BOSS POUR ON INSECTICIDE: Broad spectrum insecticide against lice, horn flies and face flies. Aids in control of horse flies, stable flies, mosquitoes, black flies and ticks. Effective
ULTRA BOSS POUR-ON INSECTICIDE features broad-spectrum control in a pour-on.
Containing 5% permethrin and 5% piperonyl butoxide, ULTRA BOSS POUR-ON INSECTICIDE controls lice, flies and more in lactating and non-lactating dairy cattle, beef cattle and calves.
About ULTRA BOSS POUR-ON INSECTICIDE:
- Broad-spectrum insecticide against lice, horn flies and face flies. Aids in control of horse flies, stable flies, mosquitoes, black flies and ticks.
- Effective horn fly control for 8 weeks.1
- Season-long lice control with one application (January through April).1
- Fast-acting permethrin formulation with 5% piperonyl butoxide optimizes control.1
- ULTRA BOSS POUR-ON INSECTICIDE should be used as part of an integrated pest management system with the use of other pest control practices.
Dosage and Usage:
- Repeat treatment as needed but not more than once every 2 weeks.
- Do not allow pesticide to enter or run off into storm drains, drainage ditches, gutters or surface waters.
- Not for use in outdoor residential misting systems.
- Available in one U.S. quart (treats 57 550-lb. cattle) or one U.S. gallon (treats 229 550-lb. cattle).
- For more information, including complete directions and warnings, please see the product label.
| Pkg Size | UPC # | UIN # |
|---|---|---|
| Quart | 300615260029 | 065590 |
| Gallon | 300615260012 | 065589 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
Nice shirt, great price.
Fit Type: Regular Fit, Color: White, Size: Medium
Worn it twice and I find it very comfortable. I wear it outside and casually to protect my arms and neck from the sun and find it more comfortable than a long sleeve t-shirt. The price is comparable. If I was to wear it to the office it would have to be ironed. I bought one shirt to try it and I will be buying more.
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Reviewed in the United States on May 8, 2026
★★★★★ 4
Nice shirt!
Fit Type: Regular Fit, Color: White, Size: X-Large
I added one of these shirts to another order just to see if they were any good. I was pleasantly surprised by the quality. It fits perfectly and looks pretty nice for a low cost casual dress shirt. Materials seem decent quality. Comfortable, soft fabric. Didn’t shrink too much in the washer and dryer. We’ll see how it holds up long term but so far so good
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Reviewed in the United States on November 12, 2025
★★★★★ 5
nice quality
Fit Type: Regular Fit, Color: White, Size: Small
nice quality shirt. bought this just so i had at least one nice white button down and it's great. fits well and is a nice white color.
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Reviewed in the United States on April 11, 2026
★★★★★ 5
A perfect white work shirt.
Fit Type: Regular Fit, Color: White, Size: Medium
Thick, durable, iron exquisitely and the fit is spot on. Perfect white work shirt. I have a grey shirt too, the quality is the same.
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Reviewed in the United States on March 4, 2026
★★★★★ 3
Right fit
I love this shirt it was nice and bright when I got it after a few wash it started to fade out a bit was a perfect fit for a medium built person 5’7 I still would recommend this product they are really nice and thick
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Reviewed in the United States on September 14, 2025