Read Nu_Terb_900WDG_brochure.pdf text version

A selective herbicide for broadleaf weed and grass control in forestry, maize, sweetcorn, peas, certain orchard crops and long-term weed control in non-crop situations

Nu-Terb contains 900g/kg terbuthylazine in the form of a water dispersible granule. It is suitable for broadleaf and grass weed control in forestry, maize, sweetcorn, peas, pipfruit, citrus, grapes, kiwifruit and industrial weed control.


Radiata pine, Douglas fir, Eucalyptus species (E. delegatensis, fastigata, and saligna). Nu-Terb 900WDG may be applied either pre-planting or as a release treatment over newly planted bare rooted trees. It controls a wide range of grasses and broadleaf weeds such as Yorkshire fog, browntop, sweet vernal, ryegrass, poa spp., cocksfoot, catsear, chickweed, seedling gorse, thistles, clover and lotus. Best control will be obtained if treatments are applied to bare ground or when existing vegetation is less than 10cm high, before it undergoes rapid spring growth.

Note: Where grass weeds predominate, especially the more difficult to kill perennial grasses, it is recommended that Nu-Terb 900WDG be tank-mixed with an approved selective grasskiller such as Centurion® Plus.

Why choose Nu-Terb 900WDG?

Higher active

The higher active means that there is less product to store and carry.


With a convenient cardboard box, the packaging is easier to dispose of and more environmentally friendly. Plus, there's no recycling levy payable on a cardboard container.

Easily contained

Because Nu-Terb is a dry formulation, any spillage is containable and easily cleaned up.


The dry formulation is easy to measure by volume and mixes readily.

ForesTry ApplIcATIoN rATes

Broadcast Treatment:

Apply 8.3 ­ 11.0kg Nu-Terb 900WDG in 150-300 litres water/ha (refer to Table 1 for more details).

GeNerAl usAGe INFormATIoN

Nu-Terb 900WDG is absorbed through both roots and leaves, with effects taking 1-3 weeks to become apparent. Rainfall within three hours of spraying will lessen the effect of post-emergence application. For both pre and post-emergence treatments, rainfall or irrigation within one week of spraying is necessary for good residual control. For pre-emergence use Nu-Terb 900WDG should be applied to a clean soil surface with a firm fine tilth and good soil moisture.

Spot Treatment:

Carefully calibrate equipment to apply 0.83-1.1g Nu-Terb 900WDG per square metre in sufficient water for good coverage. Treat approximately two square metres around each tree (refer to Table 1 for suggested dilution rate).

Note: If you have been using a 500g/L suspension concentrate formulation of terbuthylazine, refer to the Conversion Chart in Table 3.

Table 1 ­ Application rates, Forestry.


Nu-Terb 900WDG

Table 2 ­ Tree species that are tolerant to Nu-Terb 900WDG

Notes The following tree species are tolerant to Nu-Terb 900WDG at 8.3kg/ha over foliage when dormant.

Please note: This information is given as a guide only to foresters and is based largely on practical experience. This guide in no way represents a recommendation from Nufarm as to the safety of Nu-Terb 900WDG on these tree species and the user bears the risk for damage resulting from applications of Nu-Terb 900WDG to any tree species not specified on the product label. Care must be taken to avoid over application, especially from knapsack application. Applications must be made before the commencement of spring `flush' growth, to minimise the risk of damage. Do not add other chemicals such as amitrole or oil. Botanical name Acacia melanoxylon Alnus glutinosa Alnus rubra Casuarina cunninghamii Casuarina glauca Chameacyparis lawsoniana Cryptomeria japonica Cupressocyparis leylandii Cupressus arizonica Cupressus macrocarpa Eucalyptus delegatensis Eucalyptus regnans Eucalyptus saligna Juglans nigra Pinus nigra Pinus radiata Pseudotsuga menziesii Thuja plicata Black walnut Corsican pine Radiata pine Douglas fir Western red cedar Lawsons cypress Japanese cedar Leyland cypress Arizona cypress Macrocarpa Common name Tasmanian blackwood Common alder Red alder

Rate of Use

Broadcast Treatment Rate/ha applied in 150-300 litres water/ ha Spot Treatment Rate/litre applied at 20ml spray solution per sq. metre 42 ­ 55g 0.25ml

Nu-Terb 900WDG + ContactTM Low Foam (wetting agent) Nu-Terb 900WDG + Centurion® Plus

8.3 ­ 11.0kg 25ml/100 litres water

General broadleaf and grass weed control, where existing vegetation is below 10cm in height. For improved knockdown where grass weeds predominate and exceed 10cm in height.

8.3 ­ 11.0kg2L

42 ­ 55g 7ml

Note: Nu-Terb 900WDG ­ use the higher rate to control gorse seedlings.

For best results, follow this forestry checklist:

1 2 3 4 5 6 7 8 9 10

Read the label and brochure Site has been grazed hard prior to planting. Check that the species of tree being treated is tolerant to Nu-Terb 900WDG (Table 2) Check that the weed species and growth stage are susceptible Select the size of spot and dose rate to be applied Calculate the volume of Nu-Terb 900WDG required (Refer to Table 1) Check the calibration and nozzle type to ensure the correct dose per tree and size of spot. When using mixtures with other products e.g. Centurion Plus, add Nu-Terb 900WDG first and ensure that it is thoroughly mixed before adding the other herbicides. Spotguns need lubrication before use and sometimes during the operation. Make sure spotguns and hoses are cleaned thoroughly at the end of each day. Check that no rain is expected within three hours. However, for residual activity, rainfall or irrigation with one week of spraying is necessary.

orchArD crops

Pipfruit, Citrus, Grapes, Kiwifruit.

Apply 3.3-4.4kg/ha. Do not apply to trees/vines less than one year old, or where plants are growing in light sandy loams. (a) Pre-emergence: Apply in spring to weed free soil. (b) Post-emergence: To control established weeds, tank-mix with Roundup TRANSORB®.

mAIZe AND sWeeTcorN

a) Pre-emergence: Apply 1.7-2kg/ha in 200-300 litres water/ha after sowing, but before crop emergence. Tank mix an approved pre-emergence grass weed herbicide if a heavy grass weed population is expected. (b) Post-emergence: Apply 1.7kg/ha to actively growing weeds not greater than 5cm high. The addition of Contact Low Foam (wetting agent) at 25ml/100 litres water will improve performance.

Note: In some locations, fathen is resistant to triazine herbicides, and a post-emergence treatment of KambaTM 500 is necessary for control.

INDusTrIAl WeeD coNTrol

For non-cropland areas such as roadsides, footpaths, pipelines, industrial storage and waste sites and around farm buildings, apply 8.3-11.0kg/ha. Use the higher rate for heavier soils and where longer term weed control is desirable. To achieve knockdown and control of existing vegetation, add Roundup TRANSORB.

Table 3 - Conversion chart

500g/L suspension concentrate formulation of terbuthylazine

500ml Fathen Maize 1L 1.5L 2.0L

Nu-Terb 900WDG

280g 560g 840g 1.1kg 1.7kg


Apply 830g to 1.1kg/ha in 200-300 litres water/ha, after sowing but before crop emergence. Do not use on light, sandy soils or on soils which are stony or low in organic matter. Use the higher rate under dry soil conditions.


TM Nu-Terb, Contact and Kamba are trademarks of Nufarm Ltd. ® Centurion is a registered trademark of Arysta LifeScience Coporation. ® Roundup TRANSORB is a registered trademark of Monsanto Technologies LLC. Used under license by Nufarm Ltd. The following products are registered pursuant to the ACVM Act 1997: Nu-Terb 900WDG No. P4804; Centurion Plus No. P5650; Roundup TRANSORB No. P7050, Kamba No. P5666. © Copyright 2007

Nufarm NZ 6 Manu Street, Otahuhu PO Box 22-407, Auckland, New Zealand Phone 09 270 4157, Fax 09 270 4159


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