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re: What is killing my St. Augustine grass? (UPDATE 9/26)
Posted on 9/14/20 at 9:01 am to notbilly
Posted on 9/14/20 at 9:01 am to notbilly
Having the same problem. I've seen some moths but cannot find any chewed up blades, and I'm now seeing entire sections dying. I truly hate St. Augustine. I put down propiconazole on the entire lawn a couple of weeks ago.. can't imagine it's fungus right now.
This post was edited on 9/14/20 at 4:12 pm
0
Posted on 9/14/20 at 9:36 am to meeple
quote:
This is good information. I wonder why bifenthrin (Talstar) isn't mentioned for the worm control? I see it used a lot here, but haven't seen much success albeit temporary for moths. I looked at the product I apply, Anderson's Duocide, and it does contain Carbaryl as it's primary ingredient with a smaller % of bifenthrin. It practically instakills the larvae.
I’m not sure not being an entomologist, but I know/knew Dr. Ring (he passed from cancer a few months ago) who was a Ph.D. extension entomologist with the AgCenter and I suspect bifenthrin might not be listed in the article either b/c it’s not specifically labeled for sod webworms and/or the other recommended insecticides are simply more effective on the sod webworm caterpillars. Dr. Ring would not have inadvertently omitted it in his article.
I notice digging a little deeper on other university websites if bifenthrin is recommended for sod webworm caterpillar control its usually recommended in combination with another insecticide such as the Ducocide chemical you used, but not as a stand alone treatment. Bottom line, looks to me that these other insecticides are better control agents for sod webworm caterpillars than bifenthrin as a stand alone treatment.
This post was edited on 9/14/20 at 9:37 am
Posted on 9/26/20 at 11:19 am to CrawDude
updating and bumping this thread in case anyone else is still having the same issue. I know other things will work. I only used Triazicide b/c it was easily available to me.
Update posted in the OP as well:
on 9/14 I applied Spectracide Triazicide granules. On 9/19 it was still spreading so I applied the wet version of Spectracide Triazicide (hose attachment) that I picked up at Lowe's. My grass was so bad that I actually sprayed about twice the recommended application b/c I wanted to make sure I didn't miss any. :) the death-spread has stopped and now my grass seems to be slowly coming back. I have some Sevin with the hose attachment that I had to order online. I plan to wait a couple of days to apply that. I'm not sure how many rounds it will take to suppress them until winter, but I plan to keep spraying.
On a related now, the granules seemed to have little to no effect on the caterpillars, but I am thinking I didn't water it in enough.
Update posted in the OP as well:
on 9/14 I applied Spectracide Triazicide granules. On 9/19 it was still spreading so I applied the wet version of Spectracide Triazicide (hose attachment) that I picked up at Lowe's. My grass was so bad that I actually sprayed about twice the recommended application b/c I wanted to make sure I didn't miss any. :) the death-spread has stopped and now my grass seems to be slowly coming back. I have some Sevin with the hose attachment that I had to order online. I plan to wait a couple of days to apply that. I'm not sure how many rounds it will take to suppress them until winter, but I plan to keep spraying.
On a related now, the granules seemed to have little to no effect on the caterpillars, but I am thinking I didn't water it in enough.
Posted on 9/26/20 at 2:38 pm to notbilly
(no message)
This post was edited on 9/26/20 at 2:44 pm
Posted on 9/26/20 at 3:24 pm to notbilly
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