This article is a work in progress. Here in Vancouver we’re under siege by various grubs in lawns across the city. You can see yards and playing fields with tufts of sod everywhere, overturned by hungry crows looking for an easy dinner of fat grubs. Fortunately I have yet to find these big beetle grubs in the garden. Unfortunately I have regularly found smaller white grubs throughout the growing season.
Last year I decided to try one of the grub spray solutions early in the season to see what would happen. I can’t say for certain, but I do think it worked. I didn’t spray all of the planted beds, but those I did spray didn’t surface grubs through the season when I overturned the soil. Those I didn’t spray exposed those tiny white grubs when I dug around in the soil.
Application was simple. You buy a container that holds something similar to a teabag full of powder (the beneficial nematodes that will eventually kill the grubs in the soil) as well as an applicator which attaches to your hose and (one hopes) evenly distributes the solution as you spray. This stuff isn’t cheap mind you, but in light of the results I’ll be doing it again this year.