Dear Hefin, from my experience over the last 35 years I can tell you with a high degree of certainty that it is possible to get a good result from glyphosate (Gallup or any of the many Glyphosate formulations) at this time of year, but that the possibility of a poor result is considerably higher than the alternative of waiting for the commencement of spring growth.
If you decide to risk it then use a high concentration rate like the 4L/Ha product in not more than 120L/Ha of water. You could incorporate a "sticker" or rain-proofing agent to keep the product on the leaves and get a prolonged uptake period, or even a surfactant to improve initial uptake and coverage. If there are any perennial grasses like couch, then it is best to wait until you see the first leaf symptoms before starting cultivations.
During periods of active growth its probably OK to cultivate 48 hours after spraying.
This is not a recommendation, and you should always read the label before commencing spraying.
Hope this helps....
(By: Will Boardman Date:2012-1-17)
Just why anyone would contemplate using such chemistry at this point, when generations have successfully worked the soil and husbanded the land is beyond me. You will need to cultivate anyway so why not use a little patience and simple common sense before risking the possible poisoning of your land for generations?
(By: Ralph Lawrence Date:2012-3-16)
Hefin
Unless you are a registered grower and have a spray operator certificate you are breaking the law in using a commercial formulation of glyphosate such as Gallup. Tou should either employ a registered contractor or purchase a home and garden formulation from a garden centre of DIY store
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