I'm looking at zukes and cukes this summer. Did OK last summer with BT
injections to control squash vine borers, which are endemic here, but
was kind of a pain in the neck even in a very small garden, and I'd
like to expand. I'm looking to do floating covers this summer, which
I've never done before. In anticipation of that, I have a few
questions for people who use them routinely. BTW, I'm in central
Texas.

Of the different brands available, different weave and different
materials, what works best? Minimal shade, maximal ventilation, yet
keep the buggers out. Ideally reusable.

Hints about deployment? How tightly do the edges have to be sealed?
I'd like to just have a couple of rocks holding down the corners.

This stuff is often sold for frost-proofing, and sellers proudly state
that temps under the cover can be 15-20F above outside temp. I DO NOT
want that in a Texas summer! With this in mind, as per the above
questions, what do I need to know in selecting the covers?

Are these only sold in rolls? Large square sheets (as in, say, 10x10
ft) might be optimal for me.

Anyone have success against SVBs just with regular spraying of BT?
That would be easiest, but I've heard that if you don't inject it,
don't bother.