Hey all!

We have some Valiant grape vines, about a foot tall that we've planted
recently. We also have a number of other plants - roses, blueberry,
etc. and we've noticed that the ends of some branches appear to be
covered in spider webs. These branches appear to be dead or dying,
with leaves drying out, etc. I don't see any insects at all, and the
web is not very dense. I doubt that it's a caterpillar.

We're zone 3A in Calgary, Alberta, Canada.

We haven't had much luck finding a decent "plant diseases and pest"
book or website.

Any idea what is happening and how to deal with it? As much as I hate
spraying chemicals (natural or otherwise) is there anything I should
be doing on a regular basis to keep the pests down on my plants
(including the apple tree from my other post)

Thanks!