Absolutely. These campaigns are all the products of Agriculture Marketing Boards[1] and are generally state-based. They're cooperative marketing agencies which growers and producers belong to to collectively promote their generic product. See also the USDA Agricultural Marketing Service[2].
are a few of the domestic ones I've worked with over the years.
EDIT:
Here's a list of all the official California Agricultural Marketing Programs[3]
Speaking of foreign avocados, in addition to Mexico, Chile grows and exports a lot to the US. Of of their interesting arguments is that being in the Southern Hemisphere, their crop is counter-seasonal to our domestic avos. http://avocadosfromchile.org
