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When to start treating lawn for Armyworms?

Posted on 8/4/23 at 2:57 pm
Posted by Modern
Fiddy Men
Member since May 2011
16970 posts
Posted on 8/4/23 at 2:57 pm
Title says it all.

Don’t wanna get hit with them like last year, the week before Halloween…..

Should I start treating now, or wait until later?
Posted by lsujunky
Down By The River
Member since Jun 2011
2628 posts
Posted on 8/4/23 at 3:03 pm to
The birds have been eating them in the neighbors yard for a couple of weeks now.
Posted by ronk
Member since Jan 2015
7540 posts
Posted on 8/4/23 at 3:13 pm to
Just be prepared. Walk your lawn every couple of days. If you don't have armyworms and your spray bifen you're going to feel confident that you're covered. Then through watering/rainfall, sunlight, etc the bifen will breakdown and the armyworms can attack. Meanwhile you think you still have them controlled.
Posted by baldona
Florida
Member since Feb 2016
23424 posts
Posted on 8/4/23 at 4:00 pm to
I have found that granular insecticide works well for about a month. Many are labeled for 60-90 days but it seems like after 40 or so the results start to drastically slow down.

So, there’s not much you can do daily other than walk your yard a couple times a week and catch them early. But if you drop granular every 5-6 weeks you are pretty covered.
Posted by Bayou
Boudin, LA
Member since Feb 2005
41619 posts
Posted on 8/4/23 at 7:04 pm to
quote:

Just be prepared. Walk your lawn every couple of days. If you don't have armyworms and your spray bifen you're going to feel confident that you're covered. Then through watering/rainfall, sunlight, etc the bifen will breakdown and the armyworms can attack. Meanwhile you think you still have them controlled.

Interesting yet disheartening. I just laid a 25 lb. sack of granular Bifen yesterday.
I had an armadillo two consecutive nights. That prompted me to lay the Bifen. No armadillo last night.
Posted by cgrand
HAMMOND
Member since Oct 2009
46713 posts
Posted on 8/4/23 at 7:04 pm to
before reveille
Posted by AFtigerFan
Louisiana
Member since Feb 2008
3673 posts
Posted on 8/5/23 at 9:06 am to
New lawn for me and I see a small area that looks to have armyworm damage. I bought what I need last night and will treat today.

I went in the garage this morning and I have about 10 of these guys on the garage floor, and I see some on my back patio.

I’m definitely treating today.
Posted by baldona
Florida
Member since Feb 2016
23424 posts
Posted on 8/5/23 at 8:21 pm to
quote:

Interesting yet disheartening. I just laid a 25 lb. sack of granular Bifen yesterday. I had an armadillo two consecutive nights. That prompted me to lay the Bifen. No armadillo last night.


Bifen is both a granular and a spray. You replied to the spray but put down granular. Granular is usually good for 30-60 days and maybe up to 90 depending on weather like rainfall. So I wouldn’t worry.

The nice thing about spray is you kill them overnight. Spray one day and everything is dead the next. If you have a problem and put down a granular it can take 2-3 days in my experience.
Posted by AFtigerFan
Louisiana
Member since Feb 2008
3673 posts
Posted on 8/7/23 at 5:41 pm to
quote:

If you have a problem and put down a granular it can take 2-3 days in my experience.
I put down granular Saturday evening. I still had about 8 armyworms crawling in my garage this morning.

Walking part of my lawn, I found some alive ones and some dead ones. The alive ones were still bright green. I'm hopeful that the dead ones are a sign of what's to come.

How long would you wait before treating again? If I see more crawling in my garage or driveway in the next couple days, would that be alarming?
Posted by baldona
Florida
Member since Feb 2016
23424 posts
Posted on 8/8/23 at 8:03 am to
Did you water it in? You usually have to water in a granular?

I’m not the best person to ask about granular as I don’t seem to have the best luck. Spray kills them overnight pretty much 100%. The problem with spray is if you get rains or run your sprinklers a decent then it washes away in a few days, and the bugs will either hatch again or come back from your neighbors yard for stuff like moths.

So I always felt like both a granular and spray was the best coverall. But if you haven’t watered in your granular do that for sure and I’d allow a good 48 hours probably.
Posted by meeple
Carcassonne
Member since May 2011
10848 posts
Posted on 8/8/23 at 8:42 am to
I don’t treat the moths. I always wait until I see signs of chewed blades then nuke them. Always worked for me.
Posted by AFtigerFan
Louisiana
Member since Feb 2008
3673 posts
Posted on 8/8/23 at 9:15 am to
quote:

Did you water it in? You usually have to water in a granular?
I did water it in. But I have enough liquid Bifen IT to treat my lawn also. If I still see them crawling around, I’ll hit them with that after the potential for rain is over.
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