I've already posted this.
Use a bag fence. This is very simple, and cheap. WHITE plastic bags that groc's, etc. from Walmart, Kroger and othe stores used to pack your purchases. The colors don't work good. Put posts around the plot, they can be metal fence posts, electric wire stakes, even rebar, etc. abput every 10 feet. String a strong strapping tape or cord around the perimeter of your plot. Then tie the bags to the line. Poke hole(s) in the bottom to drain moisture (they need to flop in the breeze. Place them about 36 inches high and about 5 feet apart. Check often as the wind will cause them to bunch up. I got the idea from an old farmer who grows a truck garden and keeps the moochers out. I've even had some luck keeping turkeys out, too. Don't know why it works, may be they have a UV glow at nite or the movement deters them I've heard that the white flapping is like their upraised tail when danger is present. All I know is that it works for me.

Russ