It works on contact and by ingestion

Use it to treat algae in fish hatcheries and slow-moving water bodies

Barnyardgrass

Use Extinguish Plus for removing big-headed and Argentine ant colonies both indoors and outdoors

Dylox 420 SL Insecticide Size:2.5 Gal Container EPA Reg. No. 432-1464 It works on contact andHow Dylox Dylox 420 SL Insecticide Works Dylox 420 SL insecticide works effectively thanks to trichlorfon, a chemical ingredient that targets the nervous system of various soil insect pests. It works by contact and ingestion, controlling grub larvae and other labeled insects. In fact, it's the go to product for eliminating third instar grubs late in the season. Where to Use Dylox 420 SL Insecticide Use Dylox 420 SL insecticide anywhere grubs and other