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  • From: <geiger@vetigastropoda.com>
  • To: pleurothallid-l@lists.ibiblio.org
  • Subject: [pleurothallid-l] peroxide heat-schock treatment details, please
  • Date: Mon, 17 Oct 2011 18:21:56 -0400

Greetings,

We had some rather drastic temperature swings in southern California in the
past month, and a number of my pleuros started dropping perfectly healthy
leaves right at the abscission point. I heard at the Southland Orchid Show at
the
Huntington Garden in Pasadena, Los Angeles, that this could be heat-stress,
and that it can be arrested with a bath of the roots in peroxide, straight
from the bottle! Sounds crazy, but I have nothing to loose.

Does anybody have details on this?
- Strength: really straight from the bottle? Or dilute, by how much?
- where: only roots, or douse entire plant?
- should it soak in for a while (how long), or just a quick drip?
- should the plant be rinsed in water right after, or should the peroxide be
permitted to stay on till the next watering?

I have a swamp cooler going, and humidity is maintained around 70-80% with
automated misters and humidity sensor. Affected plants are rather those with
thin grassy leaves (Masdevallia erinacea, Pleurothallis sp. Panama (2x), Pl.
truncata) but some with thicker leaves also showed effects (Pl. obscura
[RIP], Masd. zahlbruckneri {RIP]). Others are completely unaffected (Pl.
petiolata, Pl. simji, Pl. amparoa, Dryadella zebrina, D. elata, D. albicans,
4 Dresslerella species, 2
Myoxanthus species, 3 Dracula species).
During the peak, constant summer heat, everything was fine, so I think it is
the rather extreme swings that did the number on them. Essentially, they got
the yearly range overnight. A bit much for those tropical plants, I guess.

Thanks for your collective wisdom.

Daniel



  • [pleurothallid-l] peroxide heat-schock treatment details, please, geiger, 10/17/2011

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