Not all plants are the same, not all will transport similar dose to reproductive organs
Toxicity to bees is a certainty, What differ are those factors who build up the lethal dose
Among them: Reservoir that was left in the ground till the next bloom
(extremely variable).
How much the plant is transferring to the pollen(differ between plants)
Does Bees feed on one crop solely, or more
What is the formulation.
No doubt imidacloprid is effective against white fly, and extremely easy to use in any way
However
Its features, mainly dropping prices & easy to apply and forget, making it very tempting
Yet it is advised to use it sparely and wisely only when really needed
Eventually, same as Organophosphate Pesticides were replaced by Pyrethroid Pesticides
which in their turn where replaced by neonicotinoid Pesticides
Those last ones In their turn will be replaced two
Already white fly populations begin to develop immunity mostly toward Imidacloprid,
and to lesser extent toward Acetamiprid,
For the meanwhile dosage change will suffice to handle those populations
The advise of using few different pesticides in circulation to prevent immunity
is forgotten by many farmers.
To conclude,
Not hugging trees at weekends, and not dancing naked at the camp fire,
Just being realistic and practical(opposed to theoretical)
Although that material is good for controlling white fly among others,
it is not a product without blemishes, Do not use it just because its cheep and easy
And if used try to apply not more than advised
the avocado stem acts like a filter
How does it reach the leafs than.
I second CTMIAMI advises, Not to apply wile plants are blooming
And use as little as possible, Measure not by guessing, use accurate volumetric
Since that stuff is not needed on the surface, but at root depth
if the soil is dry drench it a bit with water, then with the diluted material, and again with
small amount of water so tat the roots will meet it quickly