To assess the efficacy of imidacloprid applied at varying rates
Imidacloprid is continually being detected in local waterways at above threshold levels. One way of reducing this value is to reduce the rates at which it is applied to the paddock. A number of growers apply grub control products on a yearly basis, however may not check to see if grubs are actually present in the soil.
This trial uses two rates and a nil treatment to assess whether the block requires treatment yearly and if is requires the full label rate of 1.4L/ha.