Re: Weed control and fungal leaf spot control
iris@hort.net
  • Subject: Re: Weed control and fungal leaf spot control
  • From: &* S* <s*@molalla.net>
  • Date: Mon, 28 Mar 2011 08:49:15 -0800
Paul, Dana, et al: I have used Fusilade (fluaziflop) in the past and although it works fairly well I have found that it has no effect on annual blue grass (Poa annua). On the other hand I have found that ENVOY (Clethodim) works just just as well, gets rid of Poa annua and can be sprayed directly over iris with no ill effect. With respect to STINGER...I have used it for about ten years now and am quite pleased with how it works. It is effective (according to label) over a wide range of broad leaf weeds but I use it mainly to control thistle and clovere for which it is extremely effective especially when growing in the middle of an iris clump. As to an effective fungicide I have used both Terraclor (PCNB --- parachloronitro enzene) and Cleary's 3336 WP and both work quite well. Also note that Cleary's works extremely well on "damp off".
STINGER is a bit "pricey" here in Oregon and I'm curious, Dana, what size container you purchased and at what cost. As I said it is "pricey" but when diluted as per label is still cheaper per gallon than MILK!!! 

Dave Silverberg
----- Original Message ----- From: "Dana Brown" <ddbro@sbcglobal.net> 
To: <iris@hort.net>
Sent: Monday, March 28, 2011 6:45 AM
Subject: Re: [iris] Weed control and fungal leaf spot control



Paul,
   We also use fluazifop for grass control but purchase it under the
trade name
fusilade.  It works wonderfully for us on most of our
grasses, especially the
bermuda grass.  We have sprayed it over the iris for
years with no ill effects.
   Have you tried Cleary's 3336 WP for a
fungicide?  We have had great luck
with it.  Our local ag chemical dealer had
it in stock, so I didn't have to
order it over the internet and it is much
less expensive than Heritage.

   I'm also going to try the herbicide
Stinger (clopyralid) this year.  I have
heard some good things about it and
purchased it last year but never got around
to trying it.  This is another
one you're supposed to be able to spray right
over the iris with no bad
effects.

Dana



Dana Brown
ddbro@sbcglobal.net
Malevil Iris Gardens &
Kennels
www.malevil-iris.com

I own a dog and I vote!!
________________________________
From: Paul Archer <pharcher@mindspring.com>
To: Iris chat forum <iris@hort.net>
Sent: Mon, March 28, 2011 3:48:08 AM
Subject: [iris] Weed control and fungal leaf spot control


The third
herbicide is Ornamec (fluazifop) which is an annual grass killer.  I
got it
off of eBay.  It requires an oil-based surfactant.  You can also purchase
already containing a surfactant.  I tried it with salad oil plus some dish
soap
to cut the oil some.  It took a while and I needed a second application
a couple
of weeks later.  Helpful since it would not be wise to apply oil to
your Iris
foliage. But the weeds were hurting and were not chocking out my
Iris.  It also
seems to work better as the weather warms up and there is less
rain which
stresses the weeds.  I completley drenched one Iris plant I
planned to discard
to see if there was any effect.  It seemed fine and
bloomed.


http://cooperseeds.com/lawnchem.php3?cat=preemergent&cartid=
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