Droplet size should be in the range of medium to coarse, (BCPC). These can be easily seen but are neither large enough to roll off the target leaves nor fine enough to drift onto non-target areas to cause damage. Use a sprayer hood to avoid damage to non-target plants in close proximity.
Once sprayed the leaves should have an even coverage of drops without running off.
Using standard nozzles giving 200 litres per hectare at 1 bar pressure, a 20 litre knapsack covers 1000 square metres, when walking at 1 metre per second.
| Rate per hectare |
Equivalent dilution |
Weeds controlled |
| 3 litres |
1:67 or 15 ml per litre of water |
Annual grasses, annual broad-leaved weeds |
| 4 litres |
1:50 or 20 ml per litre of water |
Arable weeds pre-planting of trees |
| 5 litres |
1:40 or 25 ml per litre of water |
Most perennial weeds |
| 6 litres |
1:33 or 30 ml per litre of water |
Floating aquatic weeds |
| 10 litres |
1:20 or 50 ml per litre of water |
Rhododendron, Ivy
litre of water Horsetail and difficult waxy-leaved plants |
|
Special Advice
Monsanto produces further guidance on knapsack nozzle selection and calibration. Telephone 01223 849540 for more details.
Useful reference: Hand-held & amenity sprayers handbook - A complete guide to safe effective spraying. (BCPC Publications, Bear Farm, Binfield, Bracknell, BERKS, RG42 5QE Tel: 0118934 2727)
Controlled Droplet Application
Roundup Pro Biactive may be used at spray volumes of between 10 and 20 I/ha through CDA equipment, which produces droplets in the range of 200-300 microns.
Markers
Some operators choose to apply Roundup Pro Biactive with markers, which allows the product to be used with CDA sprayers.
Further Information
The hand-held weedwipers rope wick applicator may be used to apply Roundup Pro Biactive directly to weeds, using a concentration of 1 part of Roundup Pro Biactive to 2 parts of clean water.
The use of a hand-held weedwiper on tall vegetation can give effective control of the weed without damage to underlying ground cover.
When operating in or near water, it can be difficult to get the spray nozzle over weeds growing at a distance from the bank. Cooper Pegler Limited have developed a telescopic hand-held lance, which extends to give a spray range of up to 5 metres. This lance is also useful for spraying tall bankside weeds such as Giant Hogweed and Japanese Knotweed. All spray equipment should be checked and cleaned thoroughly before and after use, and should be calibrated regularly.
DYES - Suitable dyes are available which can be added to the spray solution to enable sprayed weeds to be readily identified. Ask your Roundup Pro Biactive supplier for details.
HAND-HELD WEEDWIPERS - The Microwipe weedwiper is available from Billericay Farm Services, telephone 01268 710237 or fax 01268 712125.
Always read the label. Use pesticides safely.
Roundup Biactive, Roundup Max,
Roundup Ultra ST and Roundup Gold
contain glyphosate. Monitor contains
sulfosulfuron. Latitude contains silthiofam.
Ramrod contains propachlor.
|
