Thanks, I'll give them a shot next year, along with the Romeo's.
Are your sure it's not called Tim's Black Truffles? That would seem to make more sense. Never heard of a Zap PP, sounds like some funky Mexican variety?
Maybe by not spraying, perhaps I can see which variety can take our rough conditions. Maybe tomorrow I can give some kind of report on which of my varieties are showing the best/worst suspectability.
Just saw this week's forecast. Every day in the 90s, with just a small chance of rain. Looks I'll need to do some watering later in the week. But, I will say, our nights are very humid, with lots of dew, so that helps a little bit. I have several plants over 5ft tall, and they're not really showing any heat stress yet. We sit on a east facing slope, so by 6pm, the sun is behind the tree line, so our plants don't bake until sunset.