December 10, 2013 | #11 | |
Moderator Emeritus
Join Date: Jan 2006
Location: Upstate NY, zone 4b/5a
Posts: 21,169
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Quote:
And I'm also assuming that the increased disease tolerance,not resistance, IMO is for foliage diseases only. I started saying the same many years ago b;c I felt that the upper leaf epidermis was thicker, all to say that some find PL varieties to be more tolerant of foliage diseases and some do not.It also relates to the incidence of foliage pathogens at a specific geographic area in one season, Carolyn, who loves PL over RL varieties but then one has to consider how a RL variety got to be PL in a genetic sense, and whether any other traits had changed. For me that was an issue with Indian Stripe PL and Orange Minsk PL, and Ithink the only way to tell is to grow both the RL and PL versions of the same variety in the same season,
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Carolyn |
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