Roundup results...


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Sprayed my strips with roundup the other day and when returning last evening I found very little evidence of the result I expected. Some of the grass and leaves that the mowing didn't get were turning. Most looks like it was never touched.

Was wondering if I should just turn it over and try to kill it after that.

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What kind of rate? Used 41 percent glyphosate here at about 1.75 ozs per gallon of water. Sprayed about a week ago, some is turning yellow, some has not turned yet but it will. As hot and dry as it is, seems like it should all be brown already, but not using the fast acting stuff it takes a little more time.

Would be a good idea though after you cut it up to go on and spray again about a week later, especially if you see any new growth.

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I used the Weed and Grass Killer Ready-to-use Plus. Says that weeds yellow and wilt within one hour and complete die off in 1 to 2 weeks. Thinking maybe I should have parted with a few more dollars to do it right. We had a heavy rain yesterday. Was wondering what effect that may have.

Read the label. Did you use glysophate? Some of that quick kill off stuff is not glysophate, and will wash off in the rain. Generic glysophate recommends 3 hours of no rain I believe.

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Guest luckyman4
Sprayed my strips with roundup the other day and when returning last evening I found very little evidence of the result I expected. Some of the grass and leaves that the mowing didn't get were turning. Most looks like it was never touched.

Was wondering if I should just turn it over and try to kill it after that.

Glyphosate works by getting absorbed into the leaves, if you mowed first, there was less leaf area to be absorbed into. It sounds like the stuff worked fine on the plants that weren't mowed. Hot, dry weather also helps glyphosate because it works by dehydrating the plant, if I remember correctly. Rain will wash it off, but most of the new stuff claims to be absorbed quickly, so that probably isn't as big an issue as the extra moisture helping the plant live an extra day or two.

You can turn the soil over and try to kill after that, but you have to let the new plants grow enough that the herbicide can be absorbed. Doing this will help decrease the number of weed seeds in the soil, and hopefully the number of weeds in your plot. Just remember that most glyphosate products recomend a minimum of 10 days between sparying and planting, so you are putting off planting time with each spraying.

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  • 2 weeks later...

The biggest problem some people make is that they don't put enough water on per acre. And also the smaller the tips in your sprayer the better your coverage on the plant will be. Also so weeds shut down when under drought stress and it will take longer to kill them.Some chemicals tell you not to spray when weeds are under stress. Check your lable and see about how many gallons per acre is recommended. Also if you buy roundup from a farm supply store it will be different than say a Lowes or home Depot. The commerical stuff will have a sticker agent helping it stick to the plant better.Good luck.

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