Below are links for online sources for three topics important to biological control.  I have vetted the links, they are useful and valid sources of information.  

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Know the Rules of Ecology

Websites
http://www.nature.com/scitable/knowledge/library/food-web-concept-and-applications-84077181

http://education.nationalgeographic.com/encyclopedia/food-web/

The website of Alexei Sharov:  http://alexei.nfshost.com/PopEcol/lec1/whatis.html

Basic (very) Introduction to Ecology:

https://docs.google.com/presentation/d/1fNrGJnWaenEy7YvGhqUEWKpnH2adr72PDRLUvz-ykuU/present#slide=id.i0

Mutualism
An interesting aspect of the larger ecological concept of symbiosis.  Mutualism has an important role to play in how well biological control works for homopterous insects that produce honeydew. 

Know How to Identify the Organisms

http://www.bugguide.net/node/view/15740

Key to Hymenoptera:

http://hymatol.org/keys.html

UC IPM Natural Enemies Guide - California:

http://www.ipm.ucdavis.edu/PMG/NE/natenemiespest.html

Interactive Insect ID Key:

http://keys.lucidcentral.org/key-server/player.jsp?keyId=1

Key to Heteroptera - PDF:

http://entnemdept.ifas.ufl.edu/choate/heteroptera_new1.pdf

Key to Diptera Families from Britain (still useful in CA):

http://delta-intkey.com/britin/dip/ident.htm

Know How to Validate Resources and Actions

UC IPM is an invaluable resource for beginners as well as seasoned practitioners:

http://www.ipm.ucdavis.edu/IPMPROJECT/about.html

Koppert, Inc. is an excellent company that provides substantial information for end users to ensure product quality and performance: 

http://side-effects.koppert.nl/

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