Blue torch black spot.
Blue torch black spot.
Noticed a couple of small black spots on this guy. Any idea what could be causing it? Thank you
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Breckenridge, CO
Re: Blue torch black spot.
These guys are very sensitive to cold air, m.b. cross-draught?
- Steve Johnson
- Posts: 4530
- Joined: Thu Nov 03, 2011 4:44 am
- Location: Los Angeles, CA (Zone 10b)
Re: Blue torch black spot.
Please see this note to new members:
viewtopic.php?t=43819
Since it appears that you're keeping your blue torch in the house, I don't think you'd have the problem anttisepp just described. IMO the black spot would be more consistent with the beginning of a fungal infection -- lack of free air flow in the house may be causing it. Unfortunately I can't give you any recommendations on what to do about it. If we know your geographical location, other members may be able to give you some advice you can use.
If you just want photos without all the blather, please visit my Flickr gallery.
My location: Los Angeles, CA (Zone 10b)
My location: Los Angeles, CA (Zone 10b)
Re: Blue torch black spot.
I’m in Breckenridge,CO. I’m in zone 5a. So cacti are grown indoor.
Breckenridge, CO
Re: Blue torch black spot.
Pilosocereus is a great indoor plant because as a brasilian it doesn't need cool overwintering. Keeping dry on a sunny place is only what it needs. Other cacti usually try to grow when you cannot provide really cool place. But mixing brasilians with others often brings sad losts - tropical plants can't bear prolonged cold temps, even repeated cold cross-draught can be fatal.
Re: Blue torch black spot.
I have had a Pilocereus in the past with very similar symptoms. It was grown indoors, so cold air or low temperatures weren't the cause. Lack of fresh air and good air circulation could be the cause. A friend of mine gave me a few Pilocerei before leaving abroad. They hibernated at temperatures of 5°. Sometimes even 2°C. They were kept dry, but one developed black spots similar to yours. The others seem to be fine. Perhaps next winter I will place them with my succulents in a slightly warmer room.
Location
Antwerp, Belgium
temperate, maritime climate with mild winters and cool summers
hardiness zone 8a
Antwerp, Belgium
temperate, maritime climate with mild winters and cool summers
hardiness zone 8a