RoundUp

[barticus73]

Hi,

I am making a 1 acre DEER food plot on and old field and mowed the old pasture grass down to a couple of inches high. I then sprayed with concentrated UltraMax Roundup. How long do you think I need to wait to till this under to minimize the amount of weeds I have come up in my new clover mix plot. Can I till it right away or is there a period of time it takes for the weeds to ingest and use the roundup?
I will be using a KKII tiller to fix the seed bed.

Thanx,

Jerry

 

[bmac]

I can't answer your question exactly. However, what little I do know about Roundup would lead me to wait until I see the effects of the herbicide on the existing weeds.

I see you are in PA. Haven't checked the Weather Channel on this, but I would suspect your temps are still on the cool side. Roundup works better (read faster) in warmer temps. Therefore, I would expect it to take a week or longer to see significant effects.

Don't know if this is helpful or not.

 

[prosperity]

Roundup works into the plant in 24 hours. However, Roundup is most effective when the plant is at or near maturity (the plant is fully grown). Roundup will control (kill) most everything you get it soaked on. The only problem is that Roundup won't work on weed seed that is already in the soil. For that you need a chemical that is a pre-germinate (won't let the seeds grow). I would strongly suggest you contact your local extension agent. They can help you choose the right chemical to use at the right time. Every County in Pennsylvania has an extension agent (Dept of agriculture out of Penn State).

 

[StanInCalif]

You don't have to wait. In the early years of Roundup, when a lot of folks thought it had some residual effect, I conducted an experiment. I sprayed a solid patch of crabgrass that was to be my garden. Four days later, before it turned brown, I tilled it in and planted the seeds. I got normal germination (85- 90%). I now know that I could have done it even sooner.

 

[bmac]

I am curious about the time year when you did this. Our Extension Service guru has a radio show here and this topic comes up periodically. According to him (and it makes sense to me) this type of herbicide must be absorbed through the leaves and transported to the roots of the plant in order to work. This process occurs very quickly in warm weather - I have seen results in our hot summers within a couple of days. However, in cooler seasons, the process takes longer.

The Roundup has no effect on the germination of new seeds as I understand it. But if you want it to kill the existing weeds / grass, I assume there is a minimum time one must give it to work before tilling the ground. Otherwise, it would seem to me, the new crop will be infested by the "un-killed" weeds".

As was previously mentioned, the Roundup will not prevent the sprouting of weeds from existing seeds already in the soil. A pre-emergent herbiside will address this problem, but may also interfere with the germination of the seeds you plant.

I have now exhausted my entire knowledge base of weed control. And, sadly, it may not be entirely accurate.

 

[Racechaser69]

I make Roundup.The ultramax has a brand new surfactant in it. It is a much more hi-tech version than the old label Roundup. The new surfactant makes the plant ingest the glyphosate a whole lot faster than before.We watched thermal images of a plant being sprayed with Ultramax Roundup and the old version of Roundup. The Ultramax plant began to turn red from the outside in and was totally red in either 15 minutes or an hour I can't remember.

From what I've gathered from the "experts" that actually engineer this stuff is that after a day the plant is dead and not going to recover. The plant is dead fom day one (depending on the plant as brush takes longer) and only turning brown because it cannot ingest water because the roots have been killed. It would be much like our body being deprived of oxygen completely.We would be dead after 7 minutes but we might not be really decomposing for a couple of days.

So the softer the plant the quicker it works. For weeds I would agree with the person above who said after a couple of days it would be safe to till them under.

Racechaser

 

[chrisjbell]

Yeah, those plants are already dead, but they might not realize it yet /forums/images/graemlins/smile.gif. You can till them under now. But it is also true that Roundup has no effect on seeds, so you may see weeds popping back up. Just deal with 'em when they are small and they shouldn't be too much trouble.

 

[akman]

I just purchased Roundup WeatherMax for use in our vineyard. Is this formulation similar to the Ultra ?

Thanx,


Tony

 

[Racechaser69]

Yeah same stuff. The weathermax actually soaks in and won't wash off it is applied at least a couple of hours before the rain.

Racechaser

 

[thcri]

Bmac,

I am going to back your statement up some. I sprayed Roundup two years ago to get ready for my sod. It was in August when it was warm. In four days you could see the plants wilting. The following spring I sprayed some Roundup to get ready to seed. It was two weeks before I saw any sign of wilt and it took another two weeks before everything was dead. The chemical has to get to the roots before it can do it's damage.

Just my experienc.

murph

 

[IllMarty]

Barticus,
When you till up your ground you will be stiirring up weed seed again. After tilling let new weeds come up a bit and spray again, then plant. I sprayed on Sat and seeded clover next day. Clover plot lasted 3 yeaars. Redoing it this weekend. Marty

 

[IndianaPaul]

I use roundup on all the food plots I put out. Usuaully let it lay for a couple of weeks, the till....wait a few days and when I see first new growth, spray again. Then plant a few days later.

Also, when I do till for the food plots, I seldom till deeper than 2-3 inches to keep from bringing up the entire weed seed bank'. In some cases, I am only going about 1 inch deep (for clover, milo and sunflower.

Indiana Paul

 

[JFarms]

I sprayed with Roundup one week ago, and the weeds are just now showing yellow. We've had rain and cool weather most of the week. This is just a guess, but maybe Roundup works just as fast in spring as in summer, but in summer the weather drys the dead weed out faster. In cooler weather the dead plant looks alive for days longer--like lettuce in a refrigerator. Just a guess.

 

[BrettW]

Round Up is semi-effanderous solution that works it way into the neculiod cellous membranes of plants. It then procees to break down the nitradioxaiant particles in the cell walls thereby causing them to lose there ability to incorporate nutirents into their airticallant ventoulose systems. In the end the plant dies causing it to turn brown. I hope this helps. bw

 

[Trev]

oops.. hope I don't get two of these posts, I just did it once and it didn't show up.

Question: how toxic is this stuff to the person doing the spraying? Do you have to wear a mask, etc? How soon after spraying is it *really* safe to let kids, cats, etc., play in or around the area?

We are hoping to avoid another summer of back-breaking weeding of our gardens, and have decided we need to use something....

Tks,
Bob

 

[Anonymous Poster]

There are many different ways of measuring how toxic something is, so you probably won't get any meaningful replies in a short paragraph or 2 from this forum. For example, how toxic is it to drink directly? Vs how toxic is low-level skin contact for 20 years of exposure? Issues like that....

Roundup is very low on the toxic scales to animals, including humans. It really only acts on green plant material, and _very_ rapidly breaks down in the enviornment. Of all the chemicals out there, Roundup is one of the safest to humans, both for direct contact, and long-term lowlevel concerns, and because it breaks down so rapidly to not stay in the environment.

Some people are starting to question it's effects on the environment: It seems the Roundup itself isn't the issue, but some of the soaps & sticky agents used to make it work better against plants don't break down so fast, and accumulate in waterways, affecting frogs & fish. This is highly speculative at this point, and these additives are basically the same soaps we use everyday. Lots of hollering on both sides of this issue, no real understanding of it. Just trying to present both sides of the issue....

As with all chemicals, follow the label & wear the basic protections - long pants, long sleaves, eye protection, and unlined waterproof gloves. But all in all, Roundup is very, very low on the danger scale.

What I know from my farm chem application courses anyhow.

--->Paul

 

[Trev]

Thanks, Rambler! Sounds like good, balanced information.

 

[BrettW]

I think Rambler did a good job on the subject of toxics so I'll keep this post rather brief.
As I mentioned in my earlier post , Round Up kills plants in a rather direct and obvious manner, namely the interupiton of the nitradioxaiant particles in the cell walls. This may be difficult to understand but just imagine if you will filling a balloon with gasoline and then popping it with a flaming fitness report while dropping it into a pool of molten Marine Band recordings. I think you get the idea now. \
As to the direct or indirect implications on humans or pets, the results would be strikingly different depending on the level of acidifier in the persons/ or pets stomach assuming one did not ingest it in another manner. The human stomach and for that matter all mammals, not including the arctuieal subspecies, has a property known endogastroflanderites, (big word, sorry,) anyway, these edgfdr's as they are known do the heavy lifting as far as poison dispeiletion is concerned.
I'm rambling now so, let me cut to the chase.
Don't drink it for fun or spray it on your cats. That will keep you pretty safe. /forums/images/graemlins/tongue.gif bw

 

[normde2001]

Ok, Brett, you spelled "nitradioxaiant" the same way twice, so that must be correct, however I'm not too sure about "endogastroflanderites" or "dispeilation". I'm definitely calling you on "edgfdr". There just ain't enough vowels in there.

 

[BrettW]

Hey, Hey Norm,
Just because I'm a horn player in the Marine Band doesn't mean I dont know a thing or two about stomach acid, does it?
I give you credit, there is so much manure in my posts that I can smell it from here. bw
ps look up dispeilation. Just got to look in a quality dictionary. Not in your "average" book.