Will lumbar spondylosis respond to chiropractic manipulation?

Maybe: It may but it won't go away.

Chiro #1 for Back Pn: Chiropractic has been proven to be the #1 treatment for low back pain. Chiropractic is effective in treating this condition. Research demonstrates spinal manipulation and specific rehabilitation in conjunction the best management. Research also demonstrates that once you have back pain, it will reoccur. A Doctor of Chiropractic can help you manage it through adjustments and home exercise programs

Hard to say : Generally any drug, herb, treatment, or procedure that stands up to rigorous scientific scrutiny is included in modern medicine. The problem is that many alternative practices, Chiro etc do not stand up to scientific scrutiny and cannot be shown to work. They will take your money though and prob recommend repeat visits. Still, you will know quickly if it doesn't work. If no result -- stop going