NZTA Herbicide use on roads, highways and railway lines across NZ
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From: J Bruning
Dear New Zealand Transport Agency,
1. Please can you advise which herbicides are used by NZTA across New Zealand, including adjuvants and organosilicon surfactants (lease provide formulation names) which are applied to roadside, highway and railway line as part of roadside management. Please can you advise herbicides and mixtures used for each of the Upper, Central and Lower North Island and for the South Island as climates vary and operations may differ.
2. As part of (1) please can you advise the common mixtures of herbicides, adjuvants and organosilican surfactants (referred to as tank mixes) used in roadside, highway and railway line applications.
3. Please can you provide details the total quantities of specific herbicides used in managing road, highway and railway track applied annually across New Zealand.
4. Please can you provide an estimate of the approximate frequency of application of the above herbicides applied annually. This may differ for region so please can you provide the application frequency for the Upper, Central and Lower North Island and for the South Island.
Please consider this an Official Information Act request. Dated 12/07/2019.
From: Official Correspondence
New Zealand Transport Agency
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