Thanks everyone, I have checked for and found no damage so roots it is. I didn't think digging it up would help it's overall health so I am acting on what I have found. As I was weeding (pulling with a wiggling/vibration type of pull) I was getting most of the roots and very nice roots they are, very fine and holding all the soil (I'll have to dry them out to get the soil back). Soil is coarse concrete sand, humus and peat so the tree roots should be nice also. The bed is 8' x 7', I found 6-7 white grubs, they were not a C shape and I saw no brown head, not that I noticed anyway, I also found 2-3 that looked the same but were medium grey and did not move I thought they were dead and the white ones weren't very active either. These were fat and juicy 1.5" x 1/4".
This morning I put the sprinkler on for 1 1/2 hrs to hydrate prior to treatment, it looks like we can get no insecticides here for grubs seems they kill everything. What we can get is several brands of Nematodes I bought Grub be Gone by Scott's.
https://www.scotts.com/en-ca/scotts-grub
This lists a lot more types of grubs than the 3-4 common ones I found.
Interesting things I learned, There are 3 common types, life cycles can be 1 year to 4 years depending on type. They can damage trees, the major threat to trees is by a 10 lined June Beetle, but with young trees with very fine roots others may be interested (especially if you weed their main food supply!) LOL. Heavy watering will bring them to the surface, and one article said to mix 3 tablespoons of dish soap to i gallon water soak the soil (2 squ. yrds) and count them 10 min. later.
I have never heard of grubs on this site, I don't know who could benefit from this other than me, I guess if your trees are in the ground grubs prefer grass and weed roots leaving your tees alone, however weeding when you have grubs may not be a good idea.
Some articles I found may be of help if you ever have a problem, this first one is lists Nematodes and insecticides, the second one lists insecticides that do and DO NOT work on grubs seemed very good for anyone who can get them, Canada is very strict on these things.
Grubs are the larvae of various types of beetles. They burrow under the ground and eat...
homeguides.sfgate.com
Not all the grub control products on store shelves will be effective this spring. Here’s how to choose and use the right one for your lawn.
www.canr.msu.edu
This last one is on the 10 lined June Beetle / Bug? same thing? I don't know, I also could not find a geographical range for them, the original article I read I thought was from Texas so I don't know if this one is up here north or in the east, long way away and totally different climate.
Grubs spend a significant portion of their lives seriously marring grasses everywhere and...
homeguides.sfgate.com
So I have watered, I saw none on the surface or any birds gorging on them, and I applied the Nematodes and watered about a cm. more maybe a bit less. I stupidly did not get a photo, what I did just see on a life cycle chart is that different stages look different, stage 4 Pupa is not C shaped and may explain why they were very lethargic. One other thing Neem Oil, "
Neem oil works more as a repellant against Japanese beetles and lawn
grubs – inhibiting egg laying, growth and feeding. "
I'll keep you up to date.
Thanks again