Kay Easton wrote in message ...
In article , pelmar
writes
Much to my horror I discoverd cobweb like "sacs" of caterpillars and
their small black eggs in my apple tree.

Not eggs, faeces.

Correct, but caterpillar faeces have their own word "frass".

These sound like brown tail moth or something similar.
--
Neil Jones- http://www.butterflyguy.com/
"At some point I had to stand up and be counted. Who speaks for the
butterflies?" Andrew Lees - The quotation on his memorial at Crymlyn Bog
National Nature Reserve