看看這個，再決定有沒有必要折騰?

https://dengarden.com/gardening/How-to-Get-Rid-of-Lawn-Grubs

 

 

 

Wait: Some Grubs Are Okay

As you inspect your lawn to identify that grubs are present, it’s important to know that a healthy lawn can easily support some grubs without the need for any type of treatment.

To determine the extent of the infestation, dig and lift several sections of sod the size of one square foot by approximately three inches deep. Then follow the guidelines in the table below.

Number of Grubs within a Square Foot	What To Do
0-5	No need to treat
6-9 in a healthy lawn	If lawn is healthy, no need to treat
6-9 in a stressed lawn	A less healthy lawn may require treatment, especially if animals are digging up the grass
10 or more	It's likely that the lawn will continue to be further damaged and will require a treatment plan