I'm organic, so I don't want to spray nasty chemicals. What natural homemade concoction can I spray on a large garden 140' x 110' that will set the grasshoppers back? I can mix in my tractor sprayer(40 gallons) and spray it as long as it is safe for me and veggies. Chickens are out of the question so please don't recommend that. Thanks much for your advice!