Product of the Year.....Tenacity!

jglongisland · by **jglongisland** » January 1st, 2012, 9:53 am

gave20 wrote:It was annua and it resprouted from the leaf stems. Nasty nasty stuff. I think IF I would have sprayed earlier while the TF was still growing it would have outgrew and smothered the poa, but since there was an open spot the weed from hell took advantage of the opportunity.

I don't know my only effective control is to pull by hand.

Next year you might want to do something along the lines of a blanket spray around mid-April, lets say 3-4 oz/acre for the first one. Then a week later do the same, probably at around 3 oz, and then spot spray whatever is left. Then do the same around 9/15 or so.

Did you have a pre-M this fall? Definitely keep a solid barrier down both spring & fall.

gave20 · by **gave20** » January 1st, 2012, 3:29 pm

Put down dimension around labor day. Bad thing is I've noticed a lot growing in the neighbors yards even though we had lows in the teens and frozen ground for a week or so.

I wonder what it really takes to kill this "annual".

simpson · by **simpson** » January 1st, 2012, 3:52 pm

gave20 wrote: Put down dimension around labor day.

Might have needed to apply that again in November. It has been very warm this season

gave20 wrote: I wonder what it really takes to kill this "annual".

100° days and no water.

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jglongisland · by **jglongisland** » January 17th, 2012, 11:18 pm

After finally getting some real winter weather (mid-teens at night, high of 20-25) for a few days, just about any poa that was hit even once in mid-December is turning brown while the rest of the lawn is green.

There was a very large patch of it just over the border on my neighbors property that I hit on 12/23, 1x, with the remaining mix I had in my hand spray bottle (1.2 mls in a 32 oz bottle). The first time we went into the teens some of it turned. I was way for the weekend in Maine (where we had real cold, -16 Monday morning), and came back to see that entire patch looking brown and dead.

This could be the reason why fall applications fared so well in the university studies, it seems as if Tenacity's mechanism for undesirable weed death is enhanced by very cold temperatures.

MorpheusPA · by **MorpheusPA** » January 18th, 2012, 3:23 pm

Heh, I gotta go look! We had a 9 degree night two days ago...

Yep. Toast.

jglongisland · by **jglongisland** » January 18th, 2012, 3:27 pm

Days are getting longer again, in about 6 weeks we'll be discussing pre-M again. At this point we've made it through the worst of the possible cold weather, from here on out the extra sun light helps counter whatever winter throws at us (and snow mold, at least in the Northeast, shouldn't be a worry unless you are in Northern Maine/NH/NY/Vt. Last year at this time I had about a 24" base on LI, so my poa was all protected by the snow

appalachianturf · by **appalachianturf** » January 22nd, 2012, 10:05 am

I remember a couple years ago posting pictures of tenacity results and saying it was the best product to hit the turfgrass industry since roundup....now you know

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simpson · by **simpson** » January 22nd, 2012, 1:11 pm

Nice to see you back. How did your turf plots go?

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appalachianturf · by **appalachianturf** » January 23rd, 2012, 9:16 am

simpson wrote:Nice to see you back. How did your turf plots go?

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Thanks! They went fairly well. All the compact midnights did well short of one. The midnights did extremely well. The Americas not so great. My only regret is giving up on them so soon since individually some cultivars change with a growing season or two under their belt.

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simpson · by **simpson** » January 23rd, 2012, 6:08 pm

I know what you are talking about. I only had ten pots going and there were days that I would forget to water. Im sure I would have been distracted and not fallowed threw.

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McLovin · by **McLovin** » January 24th, 2012, 8:19 pm

At what temps can Tenacity be applied? I could not find that on the label. I have several patches of PA and would like to take them out if the mild winter continues. Our vinca minor is blooming right now! Weird winter weather so far.

MorpheusPA · by **MorpheusPA** » January 24th, 2012, 8:46 pm

If it's green, you can spray it. It might be slow to die, but it'll work.

Note, in colder weather I'd triple or quadruple the rainproof time (3 hours to 9-12 hours, in other words) just to be sure. Absorption slows severely as the temperature drops.

jglongisland · by **jglongisland** » January 24th, 2012, 9:28 pm

I think this is an outstanding time of year to spray it based on my late December experience. It is called winter bluegrass for a reason...

McLovin · by **McLovin** » January 24th, 2012, 11:57 pm

Thanks for the fast responses! Weather is showing sunny days coming up so I will apply and report results.

gotcrabgrass · by **gotcrabgrass** » January 30th, 2012, 2:53 am

I just applied yesterday (my first time). I will let you know how it goes. Lots for it to work on d/t the mild winter.

I have one question and one observation:

Question - If there is some left in my tank, and I really have no where left to spray it, how long will it still be effective in the tank? Will it damage the tank (gaskets, etc.)? Is there a safe way to drain it?

Observation - After filling my tank with water and syringing in the specified amount, all I could do was slosh the tank around. In the future I am going to half fill the tank, fill a glass jar with water, add the Tenacity to the jar, shake it up, dump it into the tank, then top off the tank with water. I think that would more effectively distribute it.

MorpheusPA · by **MorpheusPA** » January 30th, 2012, 6:22 am

It keeps. I think the stuff in my tank is six months old at this point! It does no damage to the tank that I can see, either.

gotcrabgrass · by **gotcrabgrass** » January 30th, 2012, 9:56 am

Great, thanks!

McLovin · by **McLovin** » January 30th, 2012, 2:08 pm

I applied yesterday as well (with the rest of the solution that I made up back in September) and will make another application in about 10 days... weather permitting. Highs are in the 51 to 65 F range and lows projected to be above freezing for the next 10 days.

TheWags · by **TheWags** » February 20th, 2012, 1:12 pm

How did you recent appliers make out? My lawn is green, with lime bits. It's a balmy 35 degrees. I am sorely tempted to apply a quick application. Reason says it's too cold, but if the grass is green... ?

MorpheusPA · by **MorpheusPA** » February 20th, 2012, 4:07 pm

If it's green, you can spray it. I'd try to double or triple normal dry time (make sure it won't rain in six to twelve hours or so), but it should work.

Weakening the P. annua when the weather still has some bit of harsh left in it might kill it better, I don't know.

All I know is I'm enjoying a late February with absolutely no P. annua showing. Yet, anyway!