I have been finding that many products that we have at home work great in your garden too! One of my favorite and cheap ways to get rid of Grasshoppers and Blister Beetles is by using All-Purpose Flour.
I put 3 cups of all purpose flour in a brown bag that has a few holes in the bottom (making a shaker) I tie up the top and shake this up and down on my bean plants and tomatoes. ( I do this in the morning while there is still dew on the plants it really helps the flour stick) I dust the insects and the leaves with the flour.
Note: You do have to make sure you rinse your plants off after few days. You can not keep the flour on your plants all the time. (I only do this when I see the insects are out of control) This will not harm your plants as long as you rinse them off real good.
***Don't use self-rising flour this contains salt and will injury plant leaves.