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Invisibleswimmingfast


Registered: 11/01/09
Posts: 1,013
Mold Problems? Save it, don't toss it!
    #11740921 - 12/30/09 12:53 AM (15 years, 21 days ago)

The majority of what I have read regarding mold during cultivation has been to throw away the entire thing at the first sign of mold.

I recently had an encounter with mold on the casing of my 13x9" tray and decided to test the theory I had in mind to salvage it by scooping out the small inch-by-inch portion of mold. The mold looked like a bump of off-white chalky substance (as seen in the picture). I think it was cobweb mold because some other portions of substrate around the bump looked like the more regular cob-web mold.

The substrate is straw(90%)/compost(10%) with a depth of 3.5" and a 50/50 casing of about .5" or a little more. Since it took awhile for the casing to colonize, and perhaps since I checked it a few times as it was colonizing, that is how it probably got a mold infection :/. Although I did wait a full week after casing to check it the first time.

Anyways, it was a success. The mycelium was able to "take-over" the spot where the mold bump was scooped off and now the entire tray is fruiting. However, please notice that the mycelium had colonized the majority of the casing to begin with and it's strong stance probably helped tremendously to recover from the small mold outbreak.

I hope this post saves trays, or other types of bulk grows, for people with mild mold outbreaks. I haven't tried this for the green trich mold yet, but I assume it should work with conditions similar to mine - that is - most of the casing is colonized and only a small portion contains the mold.


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Invisibledaytripper05
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Registered: 10/30/06
Posts: 6,962
Loc: In my garden
Re: Mold Problems? Save it, don't toss it! [Re: swimmingfast]
    #11740969 - 12/30/09 01:06 AM (15 years, 21 days ago)

too bad that's not the way it works. If I see mold, I throw the whole tray or tub away if it's bad. The last thing you want is to disturb the mold that will release millions of spores into the air which will cause certain failure in the long run. Cobweb mold can be treated with H2O2. Anything should be tossed or treated with a salt paste to allow for the flush to finish and then throw away. Once the substrate is contaminate, it is contaminate. Nothing you did will stop it or make it uncontaminated. With that said, a contaminated substrate doesn't (always) mean it won't fruit.

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Offlinewattballasts

Registered: 06/19/09
Posts: 503
Last seen: 13 years, 10 months
Re: Mold Problems? Save it, don't toss it! [Re: swimmingfast]
    #11740971 - 12/30/09 01:06 AM (15 years, 21 days ago)

i havent seen anyone put a lid like that on one. clever

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Invisibleswimmingfast


Registered: 11/01/09
Posts: 1,013
Re: Mold Problems? Save it, don't toss it! [Re: daytripper05]
    #11741057 - 12/30/09 01:26 AM (15 years, 21 days ago)

Quote:

daytripper05 said:
too bad that's not the way it works. If I see mold, I throw the whole tray or tub away if it's bad. The last thing you want is to disturb the mold that will release millions of spores into the air which will cause certain failure in the long run. Cobweb mold can be treated with H2O2. Anything should be tossed or treated with a salt paste to allow for the flush to finish and then throw away. Once the substrate is contaminate, it is contaminate. Nothing you did will stop it or make it uncontaminated. With that said, a contaminated substrate doesn't (always) mean it won't fruit.




Cool, I was hoping to get some input by posting this as well. Daytripper, are you implying that I should still toss out the tray I mentioned in the post? The pins are pretty big now, but you say that the shitty mold is living somewhere among them to? If I ingest these mushrooms will it harm me since the mold is supposedly sharing the same substrate? Please advise, thanks!

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OfflineZed
Certified Insane
Registered: 07/03/02
Posts: 545
Last seen: 4 years, 6 months
Re: Mold Problems? Save it, don't toss it! [Re: swimmingfast]
    #11741073 - 12/30/09 01:30 AM (15 years, 21 days ago)

as stated, h2o2 can keep cobweb in check pretty easily.

Anything other than cobweb and its a chucker for me...

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Invisibleswimmingfast


Registered: 11/01/09
Posts: 1,013
Re: Mold Problems? Save it, don't toss it! [Re: Zed]
    #11741085 - 12/30/09 01:33 AM (15 years, 21 days ago)

Quote:

Zed said:
as stated, h2o2 can keep cobweb in check pretty easily.

Anything other than cobweb and its a chucker for me...




How do you apply the h2o2, spray bottle maybe, and in what quantity do you mix it with water (part to part)?

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OfflineRandomstickynote
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Registered: 07/25/09
Posts: 824
Loc: TX Flag
Last seen: 4 years, 2 months
Re: Mold Problems? Save it, don't toss it! [Re: wattballasts]
    #11741094 - 12/30/09 01:35 AM (15 years, 21 days ago)

Quote:

wattballasts said:
i havent seen anyone put a lid like that on one. clever



I love those trays, they sell them at pretty much any grocery store. Yeah they're foil but they're cheap as shit, you can monitor it the whole time, and if it goes south you can just throw the whole tray out.

I personally take an ice pick, heat the tip, and poke several ~3/16" holes on the sides (not the top), and cover with micropore, then tape the lid to the base (to avoid the lid accidentally popping off) with cheap masking tape.

It holds in moisture pretty well too so if I'm working with cubes sometimes I'll just take the micropore tape covering the holes off at 100% colonization, and let pins form right there in the container, then take the lid off and stick them in the FC when pins are in full force.


--------------------
AMU

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Invisibledaytripper05
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Registered: 10/30/06
Posts: 6,962
Loc: In my garden
Re: Mold Problems? Save it, don't toss it! [Re: swimmingfast]
    #11741099 - 12/30/09 01:36 AM (15 years, 21 days ago)

Like I said, just because it contaminated doesn't mean you can't let the flush finish. And if it was indeed cobweb, it can be treated with H2O2. It could be that you misidentified it. Unless it starts showing green or some other funky color, other than yellow and brown as those colors can indicate metabolites and dryingg, then chuck it. Cobweb mold is gray and looks just like cobwebs. It's thin and looks a lot different than mycelium. But to someone who doesn't know any better, the mycelium that comes up from the bulk substrate or casing at first can appear to be cobweb mold. The darkness from the substrate 'bleeds' through and can make the mycelium appear gray if the mycelium is still new or weak in that area. Don't throw it out just yet. Let the flush finish and watch for the mold to return. If it does, get a pic first before you do anything and post it to be sure.

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InvisibleNecco
Thread Killer
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Registered: 08/05/05
Posts: 608
Loc: west of a white house
Re: Mold Problems? Save it, don't toss it! [Re: swimmingfast]
    #11741230 - 12/30/09 02:15 AM (15 years, 21 days ago)

It certainly isn't a given that contaminants "take over" substrates once they are visible. It is possible that it has only rooted in that one small area and was completely removed.

It is generally feared that for molds, since they release spores so readily, once it is visible it has already inoculated your sub with millions of spores. In that case, the moment you cut into your sub to remove the previous contam, you would be opening up fresh damaged real estate to the contam spores which would soon flourish.

Perhaps your contam didn't sporulate yet, in which case you are in luck. From the pic, it looks way too dense and white to be cobweb, something I am all too familiar with.

Just to add a story, I once found that a substrate had both cobweb and forest green. I immediately removed the tray and set it in the garage to be thrown out. I forgot about the tray for several days, and when I eventually came out to throw it away there were some of the biggest mushrooms I'd ever seen. Lol. The contam was still there, of course, but didn't appear to have made much progress since the initial invasion. I still threw it all away though; maybe I made the trash man a happy man. I figured the contam would kill the whole substrate, but I was wrong.


--------------------

"Now ether was substituted for chloroform, and the difference of their phenomena noted, and now some other exhilarant, in the form of an opiate or stimulant, was the instrument of my experiments, until I had run through the whole gamut of queer agents within my reach..."          I can do everything!!

Edited by Necco (12/30/09 02:40 AM)

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