Hi guys,
Recently I posted some pics of some grafted Lophophora which had an orange rot....

Does anyone recognise this? It looks like an abrasion but I think it might be growing - it could just be an abrasion that looks like its growing as the plant grows??
the yellow/white areas are a little bit sunken.

Any ideas
Thanks again.
Jim

they outside? looks like sunburn.

they are inside under two 18W Fluros.
I had a problem with my timer a few weeks back and had 4 days of constant light... which could have given them sunburn...?

this one is probably due to be degrafted so they will be away from the strong light for a while - I hope this helps
thanks kada

i honestly cant see such low wattage fluoro lighting burning anything but a seedling....but it looks like sunburn to me.....so i dunno lol.

root rot has that colour, but it spreads ddifferently. it works up the stem and when it comes to the scion rots it from the inside out, fairly evenly.

i dont think i would be worried yet, if it spreads or changes colour post another pic.

Hey WT,

Don't know how I missed this topic. Can you post an updated pic ? Its hard to tell at that early stage.

I will post a pic tonight - it has further developed . a little bigger and a little more sunken.

I guess there isn't much change - I might give some systemic fungicides a try... see if anything happens.

cheers

WT,

I don't want to jump to conclusions just yet but I think you have a pest rather than a disease. I have an idea but give the fungicide a go and post back with your results.

HN

I would much rather a pest than a disease. what would guess at the pest?

Looks very simmilar to the beginning of red spidermite damage, especially the sunken orange patch. We are just coming in to prime mite season (hot & dry) and I don't know why but the bloody things are attracted to lophos like magnets.

I personally hate them and have found it hard to get rid of them. Several of my lophs have been badly scarred. The upside is they ususally won't kill the plant !

The beginning looks much like what you have, white patches and in places of high numbers they turn orange. Once they start feeding the skin starts to sink in. Where they have fed on the skin they leave a brown harsh scarring.

Check this out for some good info on red mite. As I said i'm not 100% but looks simmilar to the beginning of mite damage.

http://lophophora.blogspot.com/search/label/Spider%20mites

mite or sucker, but yeh what HN said, more than likely insect rather than fungus.

Ick!

Yep red mite...I thought so.

If you look closely they are literally all over that plant !!! all those pale patches are mites. You need to start treatment pretty soon if you want to save it.
You can't kill them with normal insecticides but they do stop them feeding for a while and this will halt the damage, but they will continue to breed. I have beaten them a few times if you want some ideas let me know.

Also check your other plants for pale patches especially around the areoles. Quarantine any effected.

I have looked as close as I can - naked eye and magnified but can't see anything. how small are they?

looking at the pale patches (other than the obvious damage) all I can see is the texture of the plant. ?

anyway - what would you recommend? - this plant has been sitting in a confined space with about 30 others so I will probably have to treat the lot.

cheers

im not sure, but i still think its sun/water related. looks like the begginging of rot. how is the join? sometimes the pereskiopsis join will start to rot despite teh stock appearing healthy. if you lightly wiggle the scion, is it squishy/loose compared to others?

i would think that if it is spreading and was an animal pest others would have it as well...but not sure on that...my money is on rot. is it kept humid/close to something?