I had a look today . Couldn’t see anything amiss . No beetles , no larvae . I looked online to see what larvae tracks looked like , nothing like that amongst the frames , all seems ok .
I’ll maybe open it again in two weeks in case I missed something .
I purchased diamacious earth today and sprinkled a frugal amount on the corflute. I did read conflicting reports re the effect it may have on bees , but I did also read NSW gov gave a careful go ahead to use in hives.
Big thanks again to everyone for such prompt help .