Thank you Laaz, but I've never seen these bugs, and if this is correct and I 've understood well
As an alternative to dissecting buds, bud infestation can be estimated from infested fruit buttons.
Collect one green fruit, about 1.25 to 2 inches in diameter, from 50 trees scattered throughout the orchard. Remove the button and record whether the button or the fruit beneath the button is infested with live bud mites. The relationship between fruit and bud infestations is not linear, but a fruit infestation of 15 to 20% indicates a bud infestation of about 45 to 50%.
I I would have found them inside this lemon or any of my other citrus fruits