My mature avocado tree is dropping all it's leaves

[1voyager1]

I have 3 younger 4 to 6 year old avocados, a Sharwil, a Lamb Hass, and an Ota.
I have been concerned that all three are showing excessive leaf loss.

We've had unusual things happen since the eruption:

many Black Witch moths

Many Humming Bird moths

Inundated with rats - Between having bait boxes and cats, it's been more of a problem for the neighbors than us, but our numbers are up.

Chinese Hibiscus infested with mites

Bunchy Banana Top infections

and a few others

I will check the trees out for beetles, bugs and else, then get back.

EDIT:

The Sharwil and Lamb Hass leaves are definitely showing sucking damage.
From websites and pdf's, it looks to be Lace Wing damage.
The Ota looks to be OK so far.
I'll try spraying Neem Oil and see what happens.

EDIT the EDIT:
I have sprayed the Sharwil.
The tree is getting pretty big and I'm getting lazy, so I mixed a 1 gal 2% solution [well, OK, maybe as much as 4% by eyeballing it] and sprayed the ground under the tree's drip line, the whole gallon.
the tree will absorb the neem oil and it should be effective against sucking insects because it will be systemic.
I will spray again in about 2 weeks, then, maybe again.