Selective herbicide usage

cherax(Syd NSW Aust)November 29, 2012

Hello All....
I have a perplexing problem with Erharta (introduced grass) absolutely invading a sea of predominately bromelliads and aside from using diluted Roundup G2 wonder whether any people have ideas relating to selective destruction of monocots whilst leaving dicots and broms alive. I know that roundup diluted can be safe (conducting dilution trials) just interested in others experiences.
All thoughts are welcome

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jean001a(Portland OR 7b)

Selective herbicide use is easy.

Roundup kills monocots & dicots, thus is NOT selective.
Because you want to kill grass (monocots) among dicots, use an herbicide which only kills monocots.

But realize that bromeliads are monocots. So you could paint the herbicide onto the grass while avoiding the bromeliads.

Check the label to determine whether or not you need to dilute the herbicide for a paint-on application. For that purpose, it's often applied full strength.

    Bookmark   November 29, 2012 at 9:16PM
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Kimmsr(4a/5b-MI)

Some may be interested in this article.

Here is a link that might be useful: about Glysophates

    Bookmark   January 10, 2013 at 7:28AM
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lazy_gardens

Shield the bromeliads with something - a paper bag or box will work - and spray the grasses. After the spray dries, remove the shields.

Work systematically from one edge of the are to the other, making sure you don't miss a section.

    Bookmark   January 30, 2013 at 2:50PM
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