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Post by mannyherrera on May 10, 2009 0:41:05 GMT
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Post by Not a Number on May 10, 2009 1:27:14 GMT
My Dionaea 'Cupped Trap' always seem to do that. I haven't been able to prevent the inevitable death. They start to come out of dormancy looking fine then the leaves blacken and new leaf growth gets smaller and smaller with "pin-shoot" traps.
Maybe I increase the watering too much and they rot. I don't know.
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Post by meadowview on May 11, 2009 13:13:13 GMT
Hi Manny:
This doesn't look good. I notice even your Sarracenia look distraught. Have you considered the possibility of sabotage (= herbicide spraying) of your plants. We had a similar problem a few years ago and were confounded by what was going on. We had never lost plants like this before.
We ended up finding out we had a lunatic on the loose who was repeatedly spraying our plants with herbicide!!! We had to install a fence and security system to protect the plants.
Sincerely,
Phil Sheridan Meadowview
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Post by mannyherrera on May 12, 2009 2:45:25 GMT
Hi Phil. It's been a while. Hope all is well. You bring up a good point, however, I have a very, very big dog guarding the plants. She can be mean as well. No sabotage here. BUT, I do spray herbicide under the benches in order to prevent weeds and grass from getting established in my grow area. I never hit the carnivorous plants as they are on benches and the spraying takes place very low to the ground. Are there any evaporative effects to herbicides that may be affecting the plants? Doesn't seem plausible. The spray comes out in very small amounts.
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Post by kulamauiman on May 12, 2009 4:22:22 GMT
What type of herbicide? A few move in odd ways. Especially on hot still days. Also see my entry on what I managed to do to my mini bog even tough I took all sorts of precautions to preven herbicide drift. icps.proboards.com/index.cgi?board=outdoor&action=display&thread=2893I am beginning to wonder if some species are very susceptible to certain herbicides...... Mach Fukada
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Post by meadowview on May 12, 2009 14:21:35 GMT
Hi Manny:
CP in general are extremely sensitive to herbicide. I think it would be odd for an under bench application to reach the top of the bench and cause the damage you see. You could postulate a fungal infection BUT what looked like D. intermedia were dead in your images. Drosera intermedia can take very wet conditions and would be unlikely to be killed by high water and fungus. How quickly did the plants succumb?
One indication of herbicide death is you will have cross genera mortality. We thought we might have had a fungal outbreak but our plant pathologist pointed out that there was no organism that would have caused the trans genera damage we were seeing. If you are seeing cross genera damage you might suspect chemical injury. At that point it is time to set-up the security cameras.
Best,
Phil
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Post by RL7836 on May 12, 2009 14:49:53 GMT
CP in general are extremely sensitive to herbicide. I think it would be odd for an under bench application to reach the top of the bench and cause the damage you see. You could postulate a fungal infection BUT what looked like D. intermedia were dead in your images. Drosera intermedia can take very wet conditions and would be unlikely to be killed by high water and fungus. How quickly did the plants succumb? A few years ago I used an herbicide (Roundup) to kill some weeds. I took precautions to avoid drift but later found that all sunflowers within 15-20 feet of the spray were killed. Other plants between the sunflowers & the spraying were not impacted. It appears that Helianthus species may be hyper-susceptible to glyphosate-based herbicides (or I had some really bad luck ...) Have you used herbicides previously? One indication of herbicide death is you will have cross genera mortality. We thought we might have had a fungal outbreak but our plant pathologist pointed out that there was no organism that would have caused the trans genera damage we were seeing. If you are seeing cross genera damage you might suspect chemical injury. Back in this thread, Forbes isolated a Fusarium fungus as the cause of death in some Sarracenia he was growing. IIRC, this pathogen also impacted VFTs - but not Drosera or Cephalotus.
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Post by meadowview on May 12, 2009 14:58:42 GMT
Hi Ron:
Exactly. The fungus you pointed out only killed a couple species, not completely across genera.
Your sunflower debacle may have been caused by translocation of glyphosate from target species to sunflower via root contact. Herbicide can move underground via roots.
Best,
Phil
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Post by mannyherrera on May 14, 2009 3:42:34 GMT
I used 'Roundup' or the like. Nothing too potent. I've used it before with no problems. I doubt this was it. It is not possible for someone to sabotage my plants. The damage is not widespread. Some VFTs are hit and some aren't. It seems to be affecting Drosera, VFTs, Pings, and sarracenia. I've lost all of my primuliflora and ionantha. These NEVER used to be affected by anything. Similar to my D.intermedia 'Tropical', as you pointed out Phil. My only guess is fungus or a sudden change in my water quality.
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Post by Dave Evans on May 14, 2009 4:04:22 GMT
Dear Manny and Phil,
Last year, or the one before Tom Hayes received a bunch of VFT from Florida which were infected with a fungus. The way they died looks very similar to your afflicted plants. He had to treat them with something very potent, as nothing else works. I'll find out what it was. Hopefully both the name of the infection and the fungicide.
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Post by Brian Barnes on May 14, 2009 14:29:21 GMT
Hey Manny, Great to hear from you! In my conditions here in central Fl., (which is hot and tropical, but not as tropical as yours in S, Fl.) I've found that to get many of my plants through the hot overly humid Fl. Summers, that I must keep them a little more shaded and drier as well. Some forms and variants of various CP species simply refuse to grow and prosper in our freakish weather conditions. I gladly sacrifice a little coloration in order to have happy, thriving plants. All of mine (except the Helis) are growing outdoors in my greenhouse, including all of my VFT and Drosera regia forms, which also despise the constant hot conditions with no real nightly cool-down. I've seen plants in my collection appear to do what yours are doing as a result of too hot plus too wet here in Fl. It creates ideal conditions for a myriad of fungal diseases and bacteria as well. Just a wee thought! Best of luck, Brian.
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Post by Dave Evans on May 14, 2009 22:24:19 GMT
Hey Manny,
Got the name of the disease agent: Cylindrocladium. Tom is going to get the name of the stuff he used on it for you. Said he still has a fair amount left over...
But anyway, I would take some samples to a AG agent and find out what it is for certain.
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Post by mannyherrera on May 15, 2009 15:24:46 GMT
Thanks Dave. I believe Bob McMorris had a problem with that as well. Let me know what Tom used to get rid of it...please!
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Post by RL7836 on Aug 9, 2009 1:51:00 GMT
Manny, Any update on your plants?
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