Toronto Tasting Notes Contest - Harvest 2009 edition

Here's a fun harvest contest for you. First person who can correctly answer the following question will receive a pack of vegetable-theme greeting cards, drawn by me. (In order to win, you must include some kind of contact info with your answer, so I can get in touch with you to find out where to send the cards.)

CONTEST QUESTION

This tool, on display at the Bowmanville Museum, is designed to harvest one specific local food item (which may or may not be in season at the moment). What is it?

Note: the white disk with the red button is part of the display, but not part of the tool.

Clue #1: This crop is still gathered in the wild as well as farmed.

Answer via the "Comments" function. Ready, set, go...!