Centurion Rate

[JDGreen]

I'm in the same camp as klaustopher.

[bgmb]

WD, the Academics say cut rate does not bring on resistance. I say BS.

Wheat is resistant to everest at 80 ac a jug but i bet it isn't at 10 ac a jug lol

[freewheat]

But there is also synergy among herbicides. IE. mixing can make
wierd things happen, like heat up what either mixed chemical would
do on its own at twice the rate. I mean, you can add a bit of mcpa
to refine or whatever, and get weeds neither of them will get
alone.

Same for clethodim and liberty. There are reasons there are
labelled rates, and I would ere on the side of caution. Some mixes
really heat eachother up...

High, off label rates can be a disaster.

Personally, I have had good success with either the 1.6 loiberty
rate, or the normal rate with the LABELLED rate of clethodim.
Again, Wild oats are fast becoming a distant memory with several
years of diligence and zero tilling, so there is less need.

Barley is another story though.

Watch the synergy, boys.

[Klause]

freewheat, in barley use Broadband MCPA.

It will clean everything out of it, including resistance wild oats, etc.

It's fairly simple... you keep hitting things with an antigen that's too weak to kill it, but strong enough to injure, the thing will form antibodies to it. How do you think we got group 1 resistant wild oats... There were studies ( I will have to find them), where they've linked low rates of herb. to increased resistance.


FWIW, 60ac/case is a labeled rate of Centurion... so I'd stick with that if you want to stretch it.

[Rareearth]

Centurion is a poor choice to mix with liberty.
Bauer and the crop retailers both know it, who can
you trust these days. Yes it works but ....

Who today would spray regal one in the heat of
the day bright and sunny? It breaks down in or
with uv rays. So does centurion!

A better choice is assure, it gets foxtail barley and
the same weeds as centurion, but you can spray
in the heat of day when liberty works best.
Assure is from the "dim" family of chemicals and
centurion is from the " fop" group of chemicals.

[wd9]

Resistance is a complex topic and to make generalizations is dangerous. Get
into disease resistance and it's even more complicated. We farmers can't
even begin to understand it. It like talking genetics, after a very short
time its just words - big ones!

There are 2 main types of weed resistance, enhanced metabolism and target
site.

Enhanced metabolism. This causes more rapid herbicide detoxification
within resistant plants. Resistance tends to be partial but plants may be
cross resistant to a wide range of herbicides with different modes of
action. This form of resistance tends to develop quite slowly over a period
of years. Roundup falls in this category.

Target site resistance. This blocks the site of activity specific to the
herbicide’s mode of action. This usually results in complete resistance to
herbicides acting on that specific site, but not to herbicides acting on
different targets. Two main types have been identified: one affects ‘fop’
and ‘dim’ graminicides (ACCase inhibitors) - Group 1; the other affects
sulfonylurea herbicides (ALS inhibitors) - Group 2. Resistant populations
can increase rapidy.

This post is about Group 1 target site resistance and is what I was
referring to.

A good read:

http://www.umanitoba.ca/outreach/naturalagriculture/weed/files/herbicide/re
duced_rates_e.htm


If a wild oat biotype is resistant, it can easily take 40 times the rate to
kill it as there is no target site in the plant for the ACCase herbicide to
do its job. That's when you hope the liberty is getting it.