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Dollar Weeds and wild Blackberries

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Dollar Weeds and wild Blackberries

Old 06-09-2015, 06:30 AM
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Default Dollar Weeds and wild Blackberries

Well, the battle has started...areas of my yard (centipede) have a good amount of dollar weed coming in and there are a few areas where blackberries (probably 50) are coming up.

The other day, I took some Brush Killer (2, 4D-Trimec or whatever) and started "painting" the dollar weeds. This wasn't all that bad as I could grip the weeds between fingers and stroke on the killer. The next day, they were dead. I am hoping it starts getting into the roots and spreads, but it may not. I am prepared to continue to paint (and hope it works on the blackberries, too) them a few at a time, but am curious as to what others do? Is there an easier way? The pre-emerge I used didn't work so well in this regard.

Also, I have heard that Crossbow will kill the blackberries, but I don't want to spend any more money on this stuff at the moment.

Any good ideas out there? Something "easy?"
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Old 06-09-2015, 06:48 AM
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Blackberries are very susceptible to 2,4D and dicamba, so spray that brushkiller on them and wave goodbye.
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Old 06-09-2015, 07:28 AM
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Originally Posted by yarcraft91 View Post
Blackberries are very susceptible to 2,4D and dicamba, so spray that brushkiller on them and wave goodbye.
I don't want to spray as I think it will kill the centipede...I'm thinking the "painting" method may be the only way to get them under control without damage to the lawn.
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Old 06-09-2015, 09:08 AM
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OK- if you are limited to painting, then paint on Round-Up (glyphosate) in the Fall (waste of time in Spring or summer).
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Old 06-09-2015, 09:13 AM
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Why just the Fall? I've got Glyphosphate as well, but I've had a hard time with it on the blackberries when I spray underneath the oak in yard that has pinestraw bed. They shrivel up, but eventually come back.
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Old 06-09-2015, 10:13 AM
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I would not think a week solution of 24D would kill the grass. I have sprayed it in my yard for weed control. I would try a very week solution and work up in a couple of weeks if the blackberry is not turning brown.

Escort is used on blackberry a lot but don't know effect on grass or availability at local stores in small amounts.
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Old 06-09-2015, 10:15 AM
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It's not supposed to (broad leaf week killer), but the bit of research I have done says not to spray on centipede. I may try it, though.
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Old 06-09-2015, 12:28 PM
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Originally Posted by schoolsout1 View Post
Why just the Fall? I've got Glyphosphate as well, but I've had a hard time with it on the blackberries when I spray underneath the oak in yard that has pinestraw bed. They shrivel up, but eventually come back.
Blackberries grow from rhizomes in the soil. In the Fall, blackberries will pull the glyphosate down to the rhizome and kill it. Spring and summer glyphosate treatments, only the tops die and the rhizome pushes up new shoots- as you have seen. Same thing is true with broadleaf weed treatments applied to violets in the lawn- Fall is the best treatment time.
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Old 06-09-2015, 12:32 PM
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Originally Posted by yarcraft91 View Post
Blackberries grow from rhizomes in the soil. In the Fall, blackberries will pull the glyphosate down to the rhizome and kill it. Spring and summer glyphosate treatments, only the tops die and the rhizome pushes up new shoots- as you have seen. Same thing is true with broadleaf weed treatments applied to violets in the lawn- Fall is the best treatment time.
Good to know...I'm gonna kill 'em all between now and fall and go back again during Fall! Tired of looking at them...

Sad part is I have about 25 blackberries in pots on walkway to my front porch that I am "raising!"
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Old 06-09-2015, 12:32 PM
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Not familiar with centipede grass up here in the Great Frozen North, but what I've read said to apply atrazine or 2,4D to kill broadleaf weeds, but only in Fall or Winter. See bottom of page.
http://aggie-horticulture.tamu.edu/a...centipede.html
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Old 06-09-2015, 12:35 PM
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Here in Southern California we solve that problem by removing the lawn, and the big plus is the State will pay you to do it.
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Old 06-09-2015, 12:38 PM
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Centipede will choke all that stuff out if you fertilize, water and keep it cut regularly.
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Old 06-09-2015, 12:42 PM
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The problem is the sod was laid last year and proper prepping was not done so lots of weeds coming through. I have not really fertilized it much as it is fairly young, but will start a stronger regimen next year.

I've got some issues where parts of yard can hold moisture and some don't seem to hold so well (not sure if the very large live oak has a part in that) so watering feeds the dollar weed in areas I don't need the water...if that makes sense.
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Old 06-09-2015, 12:43 PM
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I'm going to sod the back yard sometime this year (or maybe next spring), so I will be going all out nuclear war on any and all weeds back there before laying it.
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Old 06-09-2015, 01:02 PM
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I fought dollar weeds in a burmuda lawn for a year. I spoke with a turf specilist and he explained how the plant grows and survives by spreading from a node and not the roots. When you spray it with Round Up or simular it will actually shut down and not absorb the chemical protecting the node. I started spot spraying with Celsuis and a couple months later it's 99% gone. When you spray it the leaves will die off but the node will sprout up a couple feet away. Spray that area too. everytime it sprouts it will be a little smaller patch. It will take several sprayings to kill the perticular node but they will eventually die off.
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Old 06-09-2015, 01:11 PM
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did Celsius not affect your Bermuda?

Edit...just looked it up and appears it should be safe for centipede. Expensive, but may be worth it. Might give it a shot...thanks!
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Old 06-09-2015, 04:50 PM
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Originally Posted by MARSH TACKY View Post
Centipede will choke all that stuff out if you fertilize, water and keep it cut regularly.
Just don't use Scott's!
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Old 06-09-2015, 06:18 PM
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I ordered Celsius for 93 bucks...let's see what happens!
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Old 06-09-2015, 07:44 PM
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2,4-D is perfectly safe for use on centipede & St. Augustine. The rates are lower for other grasses, but I use it every year here along the SC coast to control dollarweed & betony.

My dad uses Princep & Triamine (2,4-D) every year and has a perfectly clean lawn along the NC coast.
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Old 06-23-2015, 07:31 PM
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Sprayed a teaspoon/gal of Celsius the other afternoon (~95 degree heat) and it appears to have finally started working on the dollarweed. Where I sprayed are slowly yellowing and the grass doesn't appear affected. Was worried about the heat, but there was no real break in sight so I went ahead and did it as I really need to mow the lawn. Should be interesting to see the effects after the first year of use. Probably need to get a marking dye so I know where I have sprayed and haven't.

Really appreciate the heads up on Celsius.

The one blackberry plant I painted with brushkiller/2, 4D/Trimec looks like it finally died, too. Won't really attack those until Fall as suggested earlier.
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