OPS eliminate ...was best time to transplant A. belladonna

Chad Schroter Chad.Schroter@sandisk.com
Mon, 23 Jul 2012 17:38:26 PDT
Gastil,    I feel your pain. I have gone through all the stages you describe. I did have good success in one bed which was planted in bearded Iris by hand weeding every single Opc, once every month till spring. That summer I removed all the iris and solarized the bed from June-August with a double layer of clear plastic separated by aluminum cans for insulation.  The next winter there were almost no Opc remaining and I was able to wipe 'em out.

The rest of my yard is another sad story...


-----Original Message-----
From: pbs-bounces@lists.ibiblio.org [mailto:pbs-bounces@lists.ibiblio.org] On Behalf Of Gastil
Sent: Monday, July 23, 2012 4:46 PM
To: pbs@lists.ibiblio.org
Subject: Re: [pbs] best time to transplant A. belladonna

Yes Roland and Ina, too right. Nothing kills O. pes-caprae completely. Nothing.

2011 was my third year in a row treating with glyphosate, having exhausted other methods such as smothering with cardboard, burying 20 inches deep in soil, or (most futile) pulling by hand and picking out with a sieve.
Last winter I attacked it aggressively with several rounds of spray.
In beds among other bulbs, this meant down on my elbows with a tiny paint brush, touching a drop to each lobe of each leaf.
The trick is it has to be over 70 F for several hours on a Saturday or Sunday, not too soon before a rain, and not when there is a breeze.
I've tried by-the-directions. I've tried the N-fertilizer one week prior. I've tried adding a drop of dish soap as a surfactant (a bad idea.)
And I've tried a drop of red food dye and a well-whipped egg, to make a sort of thick red paint to see where it has been brushed on.
I can detect progress.  There is less of it than before. I do not imagine ever being entirely rid of it.

What I meant by "out-compete" was that A. belladonna is one of the few bulbs which can hold their own in competition with O. pes-caprae, not eliminate it, just not be hindered by it.
Same goes for Scilla peruviana, also due to the thick, heavy carpet of leaves.
I suppose in the parking strip I just do not care as much about the neon yellow scourge as I do in my precious bulb boxes.
The area the Amaryllis will go into had all its O. pes-caprae sprayed last winter but Im sure it will rebound insidiously, only this winter it will have to compete with the thick carpet of Amaryllis leaves.

But thank you for the warning. You make a very important point: it is MUCH easier to attach O. pes-caprae when it is not mixed with desirable plants which leaf at the same time!

- Gastil
Zone 9b (sort of), Cool Mediterranean.


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