Anyone know if the eggs of these can remain dormant for many months? I
understand that the adults can overwinter, but what about the eggs?

I have a plant (Brighamia insignis) which is kept in a bay window with
several other plants. Every year, at this time, it gets a heavy
infestation of RSM. None of the other plants are affected. A spray of
thiamethoxam and abamectin seems to kill off the mites (although not
before they've done a lot of damage). I repeat the spraying after 2 or
3 weeks to kill off any which have hatched from the eggs already laid at
the time of the first spraying.

This year I thought I saw a bit of a web a few weeks ago, but it didn't
seem to spread. At no other time of the year, or in previous years,
have I seen RSM on these or any other plants, and the window has not
been opened, so where are they coming from?

--

Jeff