Vegetable plant diseases, deficiency and insect issues

I am trying to locate a source to help me identify the plant issues I am having in my vegetable garden. Some of them look like insects, others might be lacking the right nutrients in the soil. I am hoping there is a source out there with images so that I can compare with my problems.
Knowing that the "Dave's garden" community is very knowledgeable and well informed, I feel that someone out there will be able to assist me here.
Olefogey

I saved this link as I found it to be easy to use to ID all the different miseries the garden can deliver. http://www.gardeners.com/on/demandware.store/Sites-Gardeners-Site/default/Search-PestsDiseases?SC=RNA7022B&utm_campaign=control&utm_source=direct&utm_content=junenews10off&utm_medium=email&email=kristie544@hotmail.com&nlid=12578.1207663.0.1.0.4036700&eid=kristie544@hotmail.com

Podster, Thank you for quick response and excellent link on Plant Pests, deseases, etc.

Hope it will help somewhat. Probably more than I could! 8 )

I use an excellent book called 'What garden pest or disease is that?' by Judy McMaugh. Lots of pictures and information

This is the best: PEST AND DESEASE DETECTIVE
http://www.gardeners.com/on/demandware.store/Sites-Gardeners-Site/default/Search-PestsDiseases

Bothlinks take you to the same place. : )