predatory nematoads for lawn grubs
Asked October 10, 2018, 9:48 PM EDT
Are they safe to humans and pets and do they really get rid of lawn grubs ? Thank You
Lane County Oregon
Thaks for your question about beneficial nematodes. Yes, they are safe for humans and other mammals - the predatory nematodes are predatory only on the soil-dwelling stage of certain insect pests, i.e., grubs. They can't infect mammals or birds.
As to effectiveness, if they are properly applied at the right time of year, according to the package directions, they can be very effective. Right now is an excellent time to apply them - the soil is still warm. Make sure it is moist, as well, since they can't survive in dry soil. The nice thing is, if it turns out you don't have the grubs you thought you have, the nematodes don't cause any other problems.
Here is an article about them from Penn State you might find informative. https://ento.psu.edu/extension/factsheets/parasitic-nematodes