I didn't know even better resistance cultivars such as Sugar Belle will require all the extra work in order to produce well. I thought it was resistant and you can grow it like normal without all the fuss. This is more like prolonging useful life of already resistant cultivars. The title made it sound like there's a solution.
Thanks for posting. It's good to see any news on where things are at.
A recent tweet(reshared on FB by Megan Lynch) made it sound like HLB is quickly taking over Southern California:
https://twitter.com/CalAgToday/status/916513831995678721