**I use spinosad of a different brand but it don't work either. -- I have tried everything known to man and still loose my potatoes to beetles!**
It takes a little patience using it. As mentioned, they need to injest it for it to work. Spraying the leaves underneath on the eggs is a big help too, getting those little boogers as soon as they hatch, and start to eat. I buy the small pint bottle, because I read that shelf life is like 3 years. I need to look mine over close tomorrowfor any sign of them. Got bigger fish to fry today.
An older buddy of mine has used hydrated lime for years to keep attackers from bugs to deer from eating plants in his garden. I used it last year, to keep the Deer from devouring plants. Workd well, but as CADplans mentions, needs to be re-applied after it rains. Last year, I had to do that at least 4 times a week. Finally had enough, and put up the electric fence.
I tried one of those fancy hand crank blowers, which waspretty well useless with the lime. It would bridge over, and humidity was always so high, it didn't help matters either with it packing. The light bulb finally came on to use one of those containers you sprinkle Parmesan Cheese on with. Use the side with the 3, large holes approx. 3/8" . Makes an almost perfect applicator. It does pack in there sometimes, but a quick shake loosens it up. I just shake it sideways, and start by just leaning it a bit from straight up, and tilt more as the amount gets less, to keep from plugging the holes. I'm thinking this one is an 8 oz. container, and I could do 2, 90' rows with it. I just filled a 2-1/2 gallon icing bucket from the local big box bakery about half full, and take to the garden with me, and fill the shaker out of that. Scoop it in, and away you go. A bit messy, but washes right off.
Here's a picture of my latest weed slayer, for between wide rows for the tomatoes & potatoes. Narrow sweeps in front are the OEM Sears sweeps, and are 7-1/2" wide. Rear middle one is an OEM Sears/David Bradley sweep from a DB Southern cultivator for a walk behind. The large 14" sweeps are from Agri-Supply. I could have set them wider, but I have them set as wide as the tires, and use them to gauge distance from plants. Worked great..!!
And, a short video of using the tail wheel on the Honda tiller. Man, I'm loving this thing. Got the depth set to just scratch about an inch or so deep, to turn those litle weed thread roots up. The wheel allows it to float across that leaf residue I put down, and not gob up/drag along on the drag type depth gauge.
MAH00553 - YouTube