On the egg spray- I experimented a little and for sure it works. It all boils down to ease for me. I eat eggs anyways so the remnants that are left over in the eggshells when soaked and then strained seemed to be enough to work. I did however buy a container of liquid eggs and that lasted a long time. From my reading the recipe varies from time to time… Dawn is usually used, some people add garlic powder, and some people cayenne. To me the cayenne and garlic would be better suited to non-edibles… i dont really want spicy garlic blackberries lol.
On a sidenote the spray of rotten eggs did seem to work against jap beetles this past summer. The parts that i didnt spray seemed to be hit harder.
Also of note after about 3 weeks of the egg spray i did get some sample munching from deer but not a full browse…