Non-Residual Weed Control - Paths, Roads, Drains
Roundup Pro Biactive and Roundup ProBiactive 450 approved for weed control in amenity, industrial, forestry and aquatic areas. The herbicide does not creep or move in the soil, to affect untreated areas such as grass verges.
New Rules 2012
From 2012 new rules from the regulator, CRD, prohibit blanket spraying of any herbicide on non-porous hard surfaces. Targeted treatment of weeds must be undertaken on roads, pavements, concrete and paved areas and drains must not be oversprayed. Full details can be found in this technical note.
Roundup products can be used at any time of the year as long as weeds are green and actively growing. Full control will not be achieved if weeds are suffering from drought stress or frost.
The first flush of germinating weeds occurs in April and May. Spraying should not start until the weeds have at least 1.2 inch (1.25cm) of growth. At this stage, they will not have begun to cause any damage, and can be treated effectively.
Roundup will also control any overwintered perennials and weeds germinating in spring.
Follow up Treatment
If the weather is mild and moist after the spring treatment, it may be necessary to re-treat areas where new weeds have emerged.
Roundup can be applied as late as October or November. The limiting factor is the first hard frost. Up to this time treatment will be effective, although symptoms will be slower to appear.
Autumn treatments should be at higher rates to eradicate damaging deep-rooted weeds. Experience has shown that a late autumn application can help to even-out work loads in the spring, by removing weeds, which would have overwintered. Spring treatment is not normally needed until after the first grass cuts.
Treatment around Trees and Hedges
Roundup will not affect plants, trees or shrubs through their roots and can be used right up to trees or hedge bottoms, provided that care is taken to avoid spray drifting onto the leaves or soft stems of plants.
Roundup does not penetrate mature bark, making it easier to use around trees.
Rates of Use
|Weeds Present||Rate of Roundup ProBio||Rate of Roundup ProVantage|
|Annual grasses and annual broad-leaved weeds||3 l/ha||2.25 l/ha|
|Perennial weeds||5 l/ha||3.75 l/ha|
In mixed infestations of annual and perennial weeds, the rate for perennials should be used.
Follow links for knapsack spraying guide, for details of low and conventional volume spraying, and CDA.