Pinguicula esseriana disease /damage

[cwatson1414]

Hey TF. I think this Pinguicula esseriana is suffering from crown rot or BHD. I am leaning towards crown rot, because some of the leaves are showing necrosis at the leaf tips rather than it coming from the base.

The plant is growing in an uncovered tank under 4 4' shoplights. Watered by tray, although I've definitely spilled water into the rosette. It appears to be entering succulent growth. Not sure if this is relevant. Only the mother plant is showing this damage.

I am looking for help in identifying the problem and solutions if they exist. Thanks, TF.

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[jeff 2]

Bonjour

unfortunately for crown rot there is not much to do, in my opinion makes leaf cuttings.

jeff

 

[theplantman]

Fusarium crown rot. I have tried many times and never saved one or its leaf cuttings.

I have saved uninfected plants in the same pot by repotting and using an appropriate (and commercial-grade) fungicide, but resort to just throwing out the infected ones ASAP.

And since you'll definitely be repotting to get rid of the infected soil, use something with less peat and better drainage.

 

[cwatson1414]

Pot-mates repotted into a new pot, media 100% Turface.
This is on a watering system with my entire Pinguicula collection. What measures can I take?

 

[theplantman]

Read about the pathogen and then adjust your conditions and growing techniques accordingly. In general, reduce susceptibility of your plants by reducing stresses, improve your drainage, sterilize the growing area, take everything off of community watering regimes. Kill fungus gnats or any other soil organisms, because they can often be vectors. Lots of options, none of them fungicidal. I've also been playing with pH, and finally found there appears to be a "sweet spot" that seems to inhibit Fusarium.

Fusarium wilt - Wikipedia, the free encyclopedia

 

[jeff 2]

Bonjour

what substrate use you ?

for me your problem seems to be having watered the plant on the rosette.

during dormancy, avoid watering and when the plant are growing watering by capillarity from the bottom of pot.

jeff

 

[cwatson1414]

Theplantman: the tip about fungus gnats is very useful to me. I truly do have fungus gnats, but ignores them because they are a nutrient source and I am not growing plants from seed currently. I will look into managing them. The "sweet spot" is extremely interesting! I read that a 6.5-7 pH will discourage Fusarium. Considering many of these plants grow in basic soils or gypsum they probably do not encounter this fungus in habitat.

Jeff 2: i use different medias. I use 1:1:1 peat sand perlite, a peat/sand/pumice/turface mix, and pure turface. The plants in mineral mixes are much more vigorous, and I am going to switch them all over to it in the next few days. I do water from the bottom, but I've had a sloppy hand a few times. I did blot it with toilet paper, but some moisture was apparently left. Thank you for the cultur tips.

It seems that a number of my conditions, namely temperatures and the lack of a fan in my set up, are quite favorable to this infection. I will adjust accordingly. Thank you both for your advice and experience with this issue.

 

[jeff 2]

Bonjour

see here the plant 'in situ' LINK

actually 'in situ' these plant are in dormancy in mexico Dry season from November to May; Seasons of rains (April to May) from June to October

jeff

 

[cwatson1414]

Bonjour

see here the plant 'in situ' LINK

actually 'in situ' these plant are in dormancy in mexico Dry season from November to May; Seasons of rains (April to May) from June to October

jeff

I've read a lot of different opinions about Pinguicula dormancy. I have, so far, gone with letting the plants tell me when to withdraw water, and in my situation many of them either have never, or do not reliably, produce succulent growth in the winter. Do you stop watering all together in November? Are your plants in natural or artificial light?

 

[jeff 2]

Bonjour

all my mexican are in dormancy ,I stop watering in november , completely for the filiform ( except P.moctezumae ) ,for the others just slightly moist to avoid desiccation

I will soon rehydrate gradually to leave them outside as soon as the frost will be gone by mid May (home)

now they are in my garage, in front of a south window with an addition of artificial light when the weather is too dark, to 9 -12°c , but from mid may outside .

jeff

 

[cwatson1414]

Fusarium crown rot. I have tried many times and never saved one or its leaf cuttings.

I have saved uninfected plants in the same pot by repotting and using an appropriate (and commercial-grade) fungicide, but resort to just throwing out the infected ones ASAP.

And since you'll definitely be repotting to get rid of the infected soil, use something with less peat and better drainage.

I took 12-15 leaf pulls, and I am getting near 100% strike rate. I identified this infection early, which may have contributed to my success with the leaf pullings.