Pleione 2014

[Nova]

hello,
VIRUS?  Fugi? 

Looks like fungus to me, but I am not an expert.

As you can see on the picture some of my last year's bulbs were heavily infected.
This year I have sprayed Microsulfo every fortnight from July onwards. It smells like devil's dung and the residue doesn't look attractive on the plants, but is had paid off. Healthy bulbs this year, even Piton has no black spots at all, yay

[Maggi Young]

Khadija - a question - the spraying has protected this year  but what was the outcome of the affected bulbs you showed from last year? Were they lost /did you destroy them ? Or did they survive at all?

[Paul Cumbleton]

Hi Julien,
I think there may be more than one problem here. At least some of this - certainly the last two photos in your post - is a disease called Colletotrichum gloeosporioides which is common on Pleiones. We sometimes call it "Black Pit Disease" because of the characteristic black depressions it causes on the bulbs, though this is not an official name. The best fungicide to use against this is one which contains the chemical chlorothalonil - I don't know if you have any such ones available to you. I know in the UK there are no amateur products any more which have this in. For professionals, there is Bravo 500.

If you cannot get this, then fungicides containing Myclobutanil also have some effect. In the Uk this can be got by amateurs as Systhane.

As Khadija has found, Sulphur cam also be effective if sprayed regularly.

The bulbs which show the large brown areas such as the third one down in your post could well be caused by the pest called Brevipalpus which has been much discussed in this forum. Oil based sprays offer the best control for this.

I hope you manage to get on top of these problems!

Paul

[pleione07]

Thank you very much Paul and Khadija   
I'm in agriculture, I have Bravo 500
did you dose used Paul?
regards

[Paul Cumbleton]

Hi Julien,
The dose for bravo is 2.2ml in each litre of water. If you spray once a month through the growing season in future you should find that this disease is controlled very well. The disease is spread easily by water splashing the spores around, so a good husbandry approach is also to water carefully into the pots rather than getting all the leaves wet.

Paul

[karel_t]

Hi Julien,
there is very difficult to say what caused these damages of your plants, if you don't use any fungicide during a season. I regularly spray all my plants once a year in August.
I personally think this is not the problem caused by virus (if you didn't watch any symptoms on flowers). I think this is a fungal or a bacteriological infection or their combination. I agree with Paul about using the strong fungicide for stop and control a fungal infection, and I also recommend you to use a preparation contained copper for control a bacterial infection.
K.

[Nova]

Khadija - a question - the spraying has protected this year  but what was the outcome of the affected bulbs you showed from last year? Were they lost /did you destroy them ? Or did they survive at all?

I did not derstoy them. Anstice Harris was the one that worried me most, to my relief it has survived. They all grew nicely, but I lost Leda due to my negligence. I had some Pleiones growing in a room, Leda was one of them, and I forgot too many times to water them

On the second picture you can still see the remains of the damaged Lhasa Blushes bulb, it has even produced two bulbils!

[Graham Catlow]

Pleione 'Confirmation' flowering for the first time. Purchased in 2011 as a  couple of small pseudobulbs.
There are three others still in leaf in the same pot and with flowers on the way.

Graham

[pleione07]

Hi Julien,
The dose for bravo is 2.2ml in each litre of water. If you spray once a month through the growing season in future you should find that this disease is controlled very well. The disease is spread easily by water splashing the spores around, so a good husbandry approach is also to water carefully into the pots rather than getting all the leaves wet.

Paul

Thank you very much Paul
I will use the Systhane, as it will in the sap of the plant,
Bravo 500 remains on the leaves without penetrating into the sap.
I applied for a product Brevipalpus, how long should I wait to apply?
sorry for my bad english 
Regards

[karel_t]

Hi Julien,
I found your photos, what you showed here in April: http://www.srgc.net/forum/index.php?topic=11294.150
I'm convinced, you have viral plants in your collection. So, I recommend you to test your last posted plants for virus. Sorry for a disappointing information.
K.

[Bart]

Finally Pleione 'Confirmation' has lost all mature leaves so you can see the flowers.
the other one, just out, is Pleione Liz Shan 'Pretty Girl'

[Graham Catlow]

Pleione maculata
I can't tell you how pleased I am with this years flowering.
It's taken a long time to get to decent bulbs and 16 flowers. It may look better in a few days when the final leaves have fallen off.
Re-potted today

Graham

[Nova]

Very nice, congrats!!!

[Graham Catlow]

Very nice, congrats!!!

Many thanks Khadija

[angie]

Pleione maculata
I can't tell you how pleased I am with this years flowering.
It's taken a long time to get to decent bulbs and 16 flowers. It may look better in a few days when the final leaves have fallen off.
Re-potted today

Graham

Really nice Graham 

Angie