My recently acquired N. x Predator from EP has almost all of its older leaves and pitchers dried up. Normally I would attribute this to the usual acclimatisation process but another local grower, who got another Predator from the same order, observed the same browning leaves, which later spread to the stem and killed the whole plant. In his case, the entire process was quite quick - within 7 days of seeing the first brown spots, the whole plant was black and dead.
In my case, I've had the plant for about 3 weeks now and the leaves have been steadily browning. When I shook the plant accidentally while checking the stiffness of the growth tip (and it is stiff), the whole plant was quite shaky, leading me to the conclusion that its roots are either few or diseased.
Here are some pictures:
As can be seen, the stem looks green, though beneath the green part it is brown and woody. I may be worrying over nothing, but being such a valuable acquisition and the experience of a fellow grower with his plant, I thought I just check with you all. Is the Predator all right? Thanks.
Growing conditions Temperature: Tropical, lowland climate; 28 - 32*C Humidity: 70% in the day and up to saturation at night Soil used: Equal parts of orchid bark, peat, perlite, vermiculite and sand. Watering: Watered once every 2-3 days, never on consecutive days.
Woody stems are OK. The green leaves look fine. Are you keeping it out of direct sunlight? That could cause a lot of dying leaves on newly travelled and repotted plants. On new arrivals, I try to keep the soil from being saturated with water, not dry but moist and airy, and keep as much humidity around the plant as possible. You could treat with orthenex just to be safe.
I've had my Predator for 5 weeks and the pitchers have dried up and some leaves are yellowing, but nothing unexpected after shipping such a large plant.
What does worry me a little are these lesions on a couple of leaves. Maybe its just a symptom of having the leaves creased while shipping the plant and later cracking during subsequent growth. Does anyone know what these are and what I should do about it, if anything?
Mine grows in typical highland environment with a bit less humidity.
Last Edit: May 21, 2006 23:56:25 GMT 7 by srduggins
A day without Nepenthes is like a day without sunshine! -- steve
Thanks for your thoughts, srduggins. I have my Predator out of direct sunlight. It receives bright light for only about 2 hrs everyday. I originally had it in a much shadier area, but the browning had already begun then. Now that you mentioned it, however, it does seem that the browning accelerated once I moved it into its current, brigher location. I've sprayed it with a systemic fungicide, just to be sure.
Last Edit: May 22, 2006 0:01:12 GMT 7 by ebeyonder
Post by agustinfranco on May 22, 2006 0:24:15 GMT 7
I found that N. X predator is more of an intermediate plant and dislikes too much heat. Due to the truncata parentage, it will definitely be more resistant to heat than the hamata parent.
By the way, wet heat = heat under high humidity is 10 times preferable as dry heat = heat without humidity or low humidity.
your plant looks like is being exposed to high heat and low humidity from time to time. I don't know how you measure the humidity in your environment, but i would check it more often. I'd put a see-through plastic bag with the large hole on top of the plant and keep it wet. Also spray the plant with a systemic fungicide to be on the safe side, prior putting the plant inside the bag. please keep the illumination constant and attempt to remove the bag about 2-3 weeks from now
I have a hydrometer to measure the humidity. The lowest I have seen it go is about 55% but it usually is about 70%. We locals certainly feel the effect of this humidity here: it's always warm and sweaty!
I will certainly check the humidity more often and, as you've suggested, I'll try the plastic bag method. Hopefully the plant survives. Thanks!
Post by nepsaroundthehouse on May 22, 2006 2:55:41 GMT 7
I got one of those large predators too with some other EP stuff and put them outdoors like I do with my other highlanders. My predator received more direct light than my other plants and the lower leaves and pitchers browned up. Now that the new leaves are opening up they are waxy and more rigid so I'm not worried about my plant. It appears settled in and is taking off now. My guess is that your plant went through a little transplant shock and lower humidity stress that browned the leaves and just needs to adjust to its new surroundings. It will probably bounce back for ya and then take several months to put out new growth and go about its business.
Post by agustinfranco on May 22, 2006 4:30:50 GMT 7
The main trick to avoid plant death is to minimize the shock when they first come. If you grow them under conditions that vary a lot from the greenhouse where the plant came from, one would expect a drastic reaction from the plant. the more drastic the shock, the longer they take to recover.
Yes. Preventing the shock is the most crucial step. Once/if they do go into shock, it's kinda hard to do anything else but wait for them to recover.
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