Dairy Australia’s Countdown project leader, Dr John Penry, explained that the key issue is not which product you use, but ensuring the teat spray is made up according to the label instructions.

“Due to some follow on effects of the Japanese tsunami in early 2011, there has been a reduction in the supply of iodine-based test disinfectants with a resultant effect on price,” Dr Penry said.

There are alternatives to iodine-based teat disinfectants. A number of products are registered for use in Australia with different active ingredients. Active ingredients in registered products include chlorhexidine, acid anionic compounds (such as alkyl benzenes sulphonic acid) and iodine.

“Always use a registered teat disinfectant. The registration process gives us confidence it is an effective product,” he said.

“Once you’ve chosen a registered product, it is critical to follow the label directions meticulously. Teat disinfection is one of the most effective ways to control cell count and mastitis. But it only works to its full potential if it’s done correctly.”

To get best effectiveness, Countdown recommends mixing a fresh batch every day or a using ready-to-use (RTU) product.

Concentrate teat disinfectants must be diluted to the correct strength for use. After mixing, the active ingredients often lose their disinfectant ability over time. Effectiveness is also reduced by contamination from milk, or other organic material.

“If you use a concentrate product, make sure you dilute with water of very high quality,” Dr Penry said.

Water from rivers, dams or tanks may contain high levels of organic matter which can deactivate the disinfectant. Water that is very high in minerals (alkaline) is also unacceptable.

“If you don’t have high quality water, a ready-to-use product may be a better option,” he said.

For more information refer to Countdown Farm Guidelines available on www.dairyaustralia.com.au or phone Countdown (03) 9620-7283.