In the “Protecting and restoring our natural heritage - a practical guide

Table six

Herbicide Mode of action Weeds controlled and use Toxicity Warnings
Buster    Systemic contact herbicide (via the leaf). No residual life in the soil. Grasses, broadleaved weeds and clovers. Provides short-term weed control Poison. Avoid contact with desirable plants and immature bark.
Gallant NF    Emulsifiable concentrate. Half-life in the soil of less than 24 hours Selectively controls grasses. Can be mixed with Versatil, Gardoprim or Simazine for controlling clovers and broadleaved weeds. Harmful substance. Immediately after use, flush sprayer several times with clean water.
Glyphosate Roundup, Renew Absorbed through foliage and translocated to all parts of the plant, including roots. Half-life <14 days in aerobic soil, and 14-22 days in anaerobic conditions. Controls most annual and perennial grasses and broadleaved weeds. Used as a pre-planting or a release spray. Can be used successfully as a stump poison. Low toxicity. Spray drift must not contact foliage or green-bark of desirable trees.
Interceptor (Organic spray - new product with limited information on weed control in establishing native plants)


Emulsifiable, non-selective, contact foliage spray. Penetrates green plant tissue, and disrupts cellular physiology. Fast acting (within minutes) but may require additional treatment. Controls annual weeds and grasses, and perennial weeds. Can be used as a pre-planting or release spray. Low toxicity. Spray drift may damage foliage, fruit or unprotected green bark of desirable plants. Also kills algae, mosses and liverworts.
Simazine    Absorbed only through roots of germinating plants. Soil residual life ranges from 3 - 12 months. Half-life varies from 27-102 days. Low leaching potential. Prevents the emergence of a wide range of annual and perennial grasses and broadleaved weeds. Flowable Simazine - poison. Others - low toxcicity. Spray drift may cause serious damage to other plants.
Terbuthylazine (Gardoprim)  Absorbed through roots and leaves. Pre- and post-emergent half-life in biologically active soils is 30 - 60 days. Controls a wide range of annual and perennial grasses and broadleaf weeds. Apply pre-planting or as a release. Hazardous substance Follow manufacturers recommendations. Avoid using near desirable plants, where the chemical may be leached into their root region.
Versatil   Absorbed by leaves, stems and roots. Controls thistles, yarrow, clovers and many difficult flat weeds. Can be mixed with other herbicides for the control of additional weeds. Do not apply to legumes or compositae (daisy family) Harmful substance. Follow manufacturer's recommendations. Remains active on plant material - do not use clippings from treated areas for compost or mulch, within 6 months of treatment.
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