The Rotowiper product was originally designed and offered to the market in the early 1990's by Bisset Engineering Ltd. With high success with local sales in New Zealand and exports to the UK, Germany, USA & Australia the company grew in strength. Tough times fell on the company in the late 1990’s with mad cow disease in the UK as one of the major contributors. The company fell into receivership 1998 but 3 months later managed to come back and continued on to 2003 when the business was sold. The new owners renamed the business Rotoworks International Ltd. ROTOWIPER is enviromentally friendly with no spray drift. ROTOWIPER can be used in windy conditions. ROTOWIPER has been developed and manufactured over 17 years.

Company details

48 Bremners Road , Ashburton , Canterbury 7740 New Zealand

Locations Served

Business Type:
Industry Type:
Market Focus:
Globally (various continents)


Owned by an absentee owner with a manager, the company did not grow significantly although remained solid until selling to the present owners Dougal and Jenny Lamont in April 2007.

The new company, Rotowiper Ltd has high goals with a very strong focus on the local market while expanding the export market. This has seen considerable growth achieved in a short period and will continue to see substantial growth for the future. With the new management and changes made there has been a 50% capacity gain in manufacturing with the same staff. With goals set to achieve efficiencies and cost reductions, the Rotowiper remains a very economic implement when considering the job that it does.

We have a research and development ethos and within a short period we have seen substantial improvements to the existing machines and also the release of the new model FU600 in the first year.

The Factory and Head Office is situated in Ashburton, about one hour's drive south of Christchurch in the South Island of New Zealand. From here we distribute Rotowiper domestically throughout New Zealand as well as exporting Rotowiper around the world.

  1. Rotowiper uses a unique carpeted drum which rotates in the opposite direction of travel. This movement insures that the roller has a constant supply of herbicide, which is in effect brushed on to your targeted weeds.
  2. As the roller rotates it applies the herbicide to the stem and the underside of the leaf, this being one of the more receptive areas for the weed to absorb the herbicide.
  3. Small weed’s exert little pressure on the carpet therefore they only remove a little herbicide.
  4. Large weeds exert more pressure therefore remove more herbicide.
  5. This means you are only applying the herbicide that is required and not wasting it.
  6. As the herbicide runs down the stem it encircles the stem and reaches the base of the weed.
  7. The advantages
    1. You have only applied herbicide to the targeted weeds.
    2. You have only applied the herbicide that is required to do the job.
    3. You have used less chemical than other alternative applicators.
    4. You can let your stock back in after any withholding time.
    5. You have increased your profits by effectively giving your pasture more moisture and sunlight to grow.
  8. As with any system of herbicide application, the best results are achieved by planning. Plan and decide when  you are going to apply the herbicide and with what chemical, and once you have planed it stick to your plan.
  9. What herbicide? In the owners manual we have listed a range of herbicides and mixes, these are suggestions only! The water that you use, the area you are in, all have different results with different chemicals, the best solution is to try small sample areas that you can monitor easily and use what is best for you in your area – Your local farm supply merchant will give you the best advice as they know your area well. Generally herbicides that can be sprayed, can be wiped.