Daniel from Underwood writes
Cyper TC is not labeled for grubs nor earthworms/nightcrawlers. It will kill those ants that contact a treated area when used as directed on the product label. For Grub Control, we would recommend reviewing out How to Get Rid of Grubs Treatment Guide for the most effective treatement and products to use.
We do like to let our customers know there are currently no products on the market in the USA that are labeled for earthworms as they are largely beneficial creatures. There are a few known control methods that include cutting back on irrigation so that the worms will go deeper into the soil for the moisture they require to survive or fertilizing your lawn after a heavy rainfall which will eliminate some of the population.
Answer last updated on: 04/29/2021