I have been doing some more research on the canola question and came across the following for Australia.
Crude protein content varies from 18.4% to 27.1%.
This will mean that it should be good to use as feedback if trapped.
In the amino acid profile, iso-leucine was a little below De Groot's recommended formula of 4%.
The full information on canola and other species can be found by going to www.honeybee.com.au, click on "Whats new", then on "Protein Content & Amino Acid Profiles". When you get into this, you will see all the species listed and canola is one of them.
Trevor Weatherhead
AUSTRALIA