Glyphosate in winter
 

Does anyone know how long it takes to work at this time of year?
My guess is 1-2 months, but i could be wildly wrong.


Regards,
Nick Maclaren.

Glyphosate in winter
 

On 05/01/2016 14:20, Nick Maclaren wrote:

Does anyone know how long it takes to work at this time of year?
My guess is 1-2 months, but i could be wildly wrong.

In a normal cold year it tends not to work at all in winter.

This year with some weeds still in active growth and flowering I expect
3-4 weeks to show some yellowing although I haven't tried it myself.

--
Regards,
Martin Brown

Glyphosate in winter
 

On 05/01/2016 14:33, Martin Brown wrote:
On 05/01/2016 14:20, Nick Maclaren wrote:

Does anyone know how long it takes to work at this time of year?
My guess is 1-2 months, but i could be wildly wrong.

In a normal cold year it tends not to work at all in winter.

This year with some weeds still in active growth and flowering I expect
3-4 weeks to show some yellowing although I haven't tried it myself.

The one problem is that you need dry foliage and a few hours of dry
after spraying, and here in S. Wales we haven't had that sort of weather
for what seems like a couple of months.
I have plenty that wants spraying but I'd sink so far into the ground if
I put a knapsack sprayer on my back............
David @ a very wet side of Swansea Bay

Glyphosate in winter
 

On 05/01/16 14:20, Nick Maclaren wrote:
Does anyone know how long it takes to work at this time of year?
My guess is 1-2 months, but i could be wildly wrong.


Regards,
Nick Maclaren.

Goolge can help. This is from
http://www.smallgrains.org/springwh/...weed/weed.html
"9. Glyphosate applied in cool/cold weather will kill weeds – it just
takes longer. Ideal temperatures for applying most POST herbicides are
between 65 and 85 F. Weeds may be killed slower when temperatures remain
below 50 F. Cold weather is a stress to plants. AMS and NIS can be used
overcome the reduced control of stressed plants. Absorbed glyphosate
will remain in the plant until warm temperatures cause weeds to resume
glyphosate translocation to growing points." (NB AMS = Ammonium sulfate;
NIS = Nonionic surfactant)

What I find most interesting here is something I've often wondered
about, and has been answered by the final sentence. It's something I've
hoped would be true, especially in relation to trying to eradicate
Spanish bluebell. If sprayed several times in spring and summer, would
the glyphosate be retained in the bulbs and reactivated when the bulb
comes into growth the next spring?

--

Jeff

Glyphosate in winter
 

On Tue, 05 Jan 2016 14:20:56 +0000, Nick Maclaren wrote:

Does anyone know how long it takes to work at this time of year?
My guess is 1-2 months, but i could be wildly wrong.


Hi Nick,

I usually spray around maples in Winter as there's no chance of
accidentally contaminating the foliage. In my experience it's around 6
weeks before there's much effect, but that's with frost; might be a
little faster in the current warm conditions. I don't think the target
has to be completely dry although no doubt it helps.

-E

--
Gardening in Lower Normandy

Glyphosate in winter
 

In article ,
Jeff Layman wrote:

Goolge can help. This is from

Thanks for that, but I am always cautious, because the Web of a Million
Lies is a gross underestimate! Thanks everyone, too, it was worth
doing, because my vegetable patch was turning into a lawn due to
the mild winter.

Either glyphosate or its effects certainly overwinter because, if you
spray lesser bindweed with too strong a conentration, it will form a
'lump' when it next regrows and for a year or so thereafter. Also,
strawberries sprayed in autumn will show no signs until the next
late spring, when they go yellow and fail to thrive.


Regards,
Nick Maclaren.

Glyphosate in winter
 

On Tue, 5 Jan 2016 14:20:56 -0000 (UTC), (Nick
Maclaren) wrote:


Does anyone know how long it takes to work at this time of year?
My guess is 1-2 months, but i could be wildly wrong.

IME, six to eight weeks. Just how cold it is would obviously affect
the length of time though (I'm not in the U.K)

Glyphosate in winter
 

"Nick Maclaren" wrote in message
...

Does anyone know how long it takes to work at this time of year?
My guess is 1-2 months, but i could be wildly wrong.

Glyphosate is actually used in winter/early spring specifically to kill tree
stumps.

https://www.youtube.com/watch?v=O-gP8ZvQ6XU.