Q.My Cotoneaster Seems To Be Getting Smothered By Spider Webs, What Can I Do To Stop This?
The cotoneaster has been in our garden for at least 28 years and suddenly, this year, it is covered in lots of spiders webs. The right hand side of the plant has started to die off and the leaves have gone brown and are falling off.

Certified GKH Gardening Expert
It's probably not garden spiders because they wouldn't hurt the plants. But spider mites, too tiny to see, can damage plants. Here is more:
https://www.gardeningknowhow.com/plant-problems/pests/insects/spider-mite-treatment.htm