Aster yellows and garlic
soilent_green, didn't want to post on your thread and cause it to drop as this may be important to garlic growers.
My comment is this - in the last three to four years I have lost all of my coneflowers and rudbeckias to aster yellows. This year I have none remaining. I have grown garlic for seven years, not in the same garden bed but less than 100' away. Considering that it is spread by the same insect vector, aster leafhopper, might it be possible that some strains of garlic are unattractive to that insect? After reading about this I can't figure why my Spanish Roja would have been unaffected. It took two to three years for all of my coneflowers and rudbeckias to succumb so I would assume continuous exposure. When I would spot it I would immediately remove the affected perennials, but that wouldn't have stopped the leafhopper since the infection would have occurred earlier.
Anyone, any thoughts?