I just had to deal with these guys. Everywhere I looked on my fresh seedlings of Bermuda there were 3-4 worms. The bermuda was looking weirdly short/not as full.
I put down Duocide and watered it in. Immediately I saw them start seizing. I felt kinda bad but also very satisfied to see it working.
The next day I didn’t see a single worm moving around. And the Bermuda started growing better the following week.
Highly recommend!
The Andersons DuoCide Professional-Grade Lawn Insect Control - Covers up to 4,500 sq ft (18 lb) https://www.amazon.com/dp/B07PH2ZZJH/ref=cm_sw_r_cp_api_glt_fabc_PJAA4QQS5RGP314ZFVZN?_encoding=UTF8&psc=1
Yeah, it took a bit to find them in the pic for me, but they look like armyworms. Big box stores have stuff for them or if you want to go hard core on them you could use this:
The Andersons DuoCide Professional-Grade Lawn Insect Control - Covers up to 4,500 sq ft (18 lb) https://www.amazon.com/dp/B07PH2ZZJH/ref=cm_sw_r_cp_api_glt_fabc_VPJFRFQQPYC18SCH29EC?_encoding=UTF8&psc=1
You may also want to cross post in r/pestcontrol. Pest control techs are in that forum and have helped me out a lot with pest questions.
Father in law ownes a pest control company. Told me to us this product. It kills damn near everything according to the label.
https://www.amazon.com/dp/B07PH2ZZJH/ref=cm_sw_r_cp_apa_i_9SUvFbNGC19F0