The state of California is already releasing thousands (if not millions) of HLB predator wasps. Florida is also doing the same. What Starch is recommending may not work in the long run,, but it does help some, and certainly does not hurt. Will it stop HLB, probably not. As to the spread of HLB in California, I believe it has spread far worse then it is known. Remember, it takes 2 plus years before any symptoms appear.