Tomato Problem Solver:
http://aggie-horticulture.tamu.edu/p...problemsolver/
Disease Management in Tomatoes - ND State University:
http://www.ext.nodak.edu/extpubs/pla...rop/pp659w.htm
Nutrient Deficiency Symptoms - University of Massachusetts:
http://www-unix.oit.umass.edu/~psoil120/manual/lab7.html
Digital Diagnostics at OSU:
http://www.ento.okstate.edu/ddd/vegetable.htm
Color pictures of mineral deficiencies in tomatoes:
http://www.luminet.net/~wenonah/min-def/tomatoes.htm
More pictures of mineral deficiencies in tomatoes:
http://www.plantphys.net/article.php?ch=t&id=289
Physiological, Nutritional, and other Disorders of Tomatoes - University of Florida IFAS Extension:
http://edis.ifas.ufl.edu/HS200
Images of beneficial insects and organisms:
http://is.tc.cc.tx.us/~mstorey/bugs.htm
Cornell Vegetable MD Online:
http://vegetablemdonline.ppath.corne...Tom_ComDis.htm
Cornell Tomato Disease Identification Key by Affected Plant Part:
http://vegetablemdonline.ppath.corne...omLeafKey.html
Actinovate and Exel LG application instructions for hose-end sprayer for large areas (or just to save time):
http://www.tomatoville.com/showthread.php?t=17203
Daconil application instructions for dial and spray/hose-end sprayer:
http://www.tomatoville.com/showpost....3&postcount=14
(last updated 2011.08.12)