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A water pH higher than 7 creates alkaline conditions can cause some pesticides to undergo degradation or chemical breakdown, a process known as hydrolysis. In general, insecticides are much more susceptible to hydrolysis than are fungicides, herbicides, defoliants or growth regulators. Organophosphate and carbamate insecticides are more susceptible than chlorinated hydrocarbon insecticides.

Tables reporting the pH of water sources across the U.K. list only a few counties that have water with a pH below 7 which is in the acid range. The rest all have sources with varying degrees of alkalinity. Both surface and ground water supplies usually contain sufficient natural alkalinity to produce pH levels between 7 and 9.

Some pesticides hydrolyze very rapidly. The hydrolysis rate can be rapid in the pH range of 8 to 9. For every pH point increase, the rate of  hydrolysis will increase by approximately 10 times. The severity of losses due to alkaline hydrolysis is governed by the degree of water alkalinity, the susceptibility of the pesticide, the amount of time the pesticide is in contact with the water and the temperature of the mixture.

The solution to the problem is lowering the pH of the water to the optimum range of 4 to 7 before mixing with the pesticide. This is accomplished by adding the recommended amount of PH Buffer. It should be noted that the buffering does not affect the residual activity of the pesticide. The buffering effect starts at the time of mixing, continues during storage in the tank, and does not stop until the water has evaporated from the spray droplet.


  • Acidifies the spray solution to correct alkaline hydrolysis of pesticides and phosphate fertilisers.
  • Reduces degradation and/or sequestering of pesticides and phosphate fertilizers and growth regulators due to high concentrations of bicarbonates
  • Improves the coverage of soil and plant treatments by buffering the ph of alkaline area’s
  • improving their take up and retention pesticide sprays
  • Indicates when the pH of the spray solution is within the optimal range of 4.5 to 5.5.
  • Fertilizer pH range requirements vary; for example, silica based foliar fertilizers require a pH range of 6.5 to 7.0, which can easily be obtained using the pH Buffer
  • pH Buffer will save you time and money with your spray applications

PH Buffer

Application Rate;


Use at 0.5% of water volume per hectare Directions For Use; 1. Measure Ph of water tobe used with ph meter or litmus paper proir to filling tank with water. 2. One third fill the spray tankwith water. Add pH Buffer until pHis 6.5 (note the quantity used), or 0.5 litres per 300 litres, whicheveris the lower, mix well. 3. Add treatment to be applied followed by remained of water, maitaningagitation. 4. Add twice the quantity of pH Buffer put in earlier, or 1 litre per 300 litrs. Maximum rate ofuse: 1.5 litres per 300 litres of total spray volume. Packed in; 10 Litre Containers

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