Hi Dide,
Thank you for your question about grubs in your lawn and garden.

Insects can cause damage; however, the damage could be caused by other factors as well. Insects are not the most common cause of lawn damage. Poor lawn care and maintenance, lawn diseases, and dog urine can resemble insect damage. It is important to identify what is causing the damage before applying a treatment.

The following OSU Extension article describes common lawn insects, their damage and how to identify them: Insect Pests in Lawns | solvepest (oregonstate.edu)

You may find the following lawn maintenance articles helpful as well:
Lawn maintenance calendar for Central Oregon | OSU Extension Service (oregonstate.edu)

Efficient Lawn Irrigation in the Intermountain West | OSU Extension Service (oregonstate.edu)

Practical Lawn Establishment and Renovation | OSU Extension Service (oregonstate.edu)

If you find insects in your lawn or garden, or have other landscape questions, I recommend you call the Plant Clinic at the OSU Deschutes County Extension in Redmond. A member of the Horticulture Staff or a Master Gardener on duty can talk with you and recommend management options. You may be asked to bring the insect to the Extension office so that it can be physically examined for identification.

You can call the phone number listed below or email your question and related photos to <personal data hidden>

The Deschutes County Extension Service Office is located on the fairgrounds in Redmond, near parking lot J.

Summer Hours: Monday through Thursday, 9:00 to 5:00 pm, Friday 9:00 am to 1:00 pm.

Phone:<personal data hidden> x79630

We always welcome your home garden questions at the OSU Plant Clinic.