Quote:
Originally Posted by Stepheninky
Would grafting have any effect on resistance to blight?
|
It would if the relevant known genes for Late Blight were included in the package of genes that are part of the most common rootstocks that I know of, such as Maxifort and Beufort, etc.,but last I looked they weren't.
And what Tom is suggesting is that even the current and latest LB genes found in, for instance, Mt. Magic and Plum Regal F1 might not be sufficient to be protective where he is b'c he's suggesting that different serotypes of LB are appearing.
The PNW has always been a hot spot for LB due to overwintering of LB in potato culll piles, the fact that the two mating types for LAB exist there which allows for sexual recombination, and both are not found in the East, as well as the cool, wet conditions that also exist there.