Home | Community | Message Board

NorthSpore.com BOOMR Bag!
This site includes paid links. Please support our sponsors.


Welcome to the Shroomery Message Board! You are experiencing a small sample of what the site has to offer. Please login or register to post messages and view our exclusive members-only content. You'll gain access to additional forums, file attachments, board customizations, encrypted private messages, and much more!

Shop: Myyco.com Isolated Cubensis Liquid Culture For Sale   OlympusMyco.com Olympus Myco Bulk Substrate   Mushroom-Hut Grow Bags   MagicBag.co Certified Organic All-In-One Grow Bags   PhytoExtractum Buy Bali Kratom Powder   North Spore Bulk Substrate

Jump to first unread post Pages: 1
Some of these posts are very old and might contain outdated information. You may wish to search for newer posts instead.
Offlineadnankaysar
Stranger
Registered: 04/03/14
Posts: 30
Last seen: 8 years, 11 months
White mold (cobweb)in sawdust spawn
    #21080691 - 01/07/15 01:11 AM (9 years, 4 months ago)

Dear All,

I have made some spawn by steaming those between 100 - 120 celcius, colled overnight then inoculated by grain mother culture. Now most of the spawn affected by cobweb, within 4-5 days the whole spawn become white. Those becoming green now. Though some spawn is running fine.
What could be the reason of that , its winter here in Bangladesh and the average %RH in lab is around 80.

Thanks,

Extras: Filter Print Post Top
Invisiblesparkle
Farmer
Female User Gallery


Registered: 07/28/11
Posts: 1,133
Loc: Philippines Flag
Re: White mold (cobweb)in sawdust spawn [Re: adnankaysar]
    #21080971 - 01/07/15 03:20 AM (9 years, 4 months ago)

Can you post pics?

Extras: Filter Print Post Top
OfflineHumbled
Local Budtender
 User Gallery


Folding@home Statistics
Registered: 01/19/08
Posts: 1,907
Last seen: 1 day, 21 hours
Re: White mold (cobweb)in sawdust spawn [Re: sparkle]
    #21083118 - 01/07/15 04:18 PM (9 years, 4 months ago)

Pictures are almost the only way someone could give you solid advice when it comes to contamination. Descriptive words usually arent enough to diagnose what is going wrong. :grin::thumbup:


--------------------
_-_--->My Trade List<---_-_

Extras: Filter Print Post Top
Offlineknomadic_niki
A mile high
 User Gallery


Registered: 06/30/14
Posts: 1,275
Loc: 6200' Colorado
Last seen: 6 years, 9 months
Re: White mold (cobweb)in sawdust spawn [Re: Humbled]
    #21086959 - 01/08/15 11:59 AM (9 years, 4 months ago)

you steamed the sawdust for how long? usually people either pasteurize at 160 F for 1 hour, OR sterilize at 212 F for 1-2 hours at 15 psi, OR sterilize at 212 F at 1-3 psi for 8 hours. anything in between those parameters will partially sterilize/over-pasteurize your substrate and you will get high contam rates


--------------------
My trade list

In search of sporeless oyster cultures

Edited by knomadic_niki (01/08/15 04:21 PM)

Extras: Filter Print Post Top
OfflineGiGaBaNEuk
Stranger
Registered: 01/07/15
Posts: 29
Last seen: 9 years, 4 months
Re: White mold (cobweb)in sawdust spawn [Re: knomadic_niki]
    #21087347 - 01/08/15 01:07 PM (9 years, 4 months ago)

Quote:

adnankaysar said:
100 - 120 celcius





"Pasteurization occurs between 160 and 180 degrees Fahrenheit (71.1111 and 82.2222 Celsius). Anything more than that and you risk killing good bacteria and allowing the bad to bloom. " :wink:


--------------------
15-jan-15 going awol to focus on a new business startup in order to finance my mushrooming.

Edited by GiGaBaNEuk (01/08/15 01:09 PM)

Extras: Filter Print Post Top
Invisiblesolarity
mm... my favourite food
 User Gallery


Registered: 03/31/09
Posts: 1,590
Loc: UK Flag
Trusted Cultivator
Re: White mold (cobweb)in sawdust spawn [Re: GiGaBaNEuk]
    #21092720 - 01/09/15 02:13 PM (9 years, 4 months ago)

C'mon guys read the OP!!

Quote:

I have made some spawn




Cobweb sounds unlikely, but need pictures!

Edited by solarity (01/09/15 02:16 PM)

Extras: Filter Print Post Top
Offlineknomadic_niki
A mile high
 User Gallery


Registered: 06/30/14
Posts: 1,275
Loc: 6200' Colorado
Last seen: 6 years, 9 months
Re: White mold (cobweb)in sawdust spawn [Re: solarity]
    #21094026 - 01/09/15 07:47 PM (9 years, 4 months ago)

whats your point, solarity? he didn't sterilize properly


--------------------
My trade list

In search of sporeless oyster cultures

Extras: Filter Print Post Top
InvisibleJuiceh
Dabbing All Day
 User Gallery


Registered: 09/25/12
Posts: 3,208
Re: White mold (cobweb)in sawdust spawn [Re: knomadic_niki]
    #21095120 - 01/10/15 12:34 AM (9 years, 4 months ago)

120c is 248f, he was sterilizing spawn. You need 15psi to get steam to 121c so he's using a PC. The question is exactly how, and how long.


Quote:

knomadic_niki said:
you steamed the sawdust for how long? usually people either pasteurize at 160 F for 1 hour, OR sterilize at 212 F for 1-2 hours at 15 psi, OR sterilize at 212 F at 1-3 psi for 8 hours. anything in between those parameters will partially sterilize/over-pasteurize your substrate and you will get high contam rates



PCing at 15 psi ~ 250f/121c not 212f. I'm guessing this was just a typo. :wink:


--------------------
Trade List

How I make 15 lbs of casing in a 941. How I line 12 shoeboxes with 1 39gal bag. How I Deep Fry Cubes!
RogerRabbit said:You need a bigger pressure cooker for this hobby. RR

Extras: Filter Print Post Top
Invisiblesolarity
mm... my favourite food
 User Gallery


Registered: 03/31/09
Posts: 1,590
Loc: UK Flag
Trusted Cultivator
Re: White mold (cobweb)in sawdust spawn [Re: knomadic_niki]
    #21095517 - 01/10/15 04:39 AM (9 years, 4 months ago)

Quote:

knomadic_niki said:
whats your point, solarity? he didn't sterilize properly




Exactly, so posts talking about pasteurisation temperatures are going to confuse the issue.

Need much more detail to help. he may have followed times and temps but with 1 massive bag or any other long list of possibilities.


--------------------
Commercial exotics farmer for 8 years - now sold up!

Extras: Filter Print Post Top
OfflineGiGaBaNEuk
Stranger
Registered: 01/07/15
Posts: 29
Last seen: 9 years, 4 months
Re: White mold (cobweb)in sawdust spawn [Re: solarity]
    #21095595 - 01/10/15 05:25 AM (9 years, 4 months ago)

if im reading correctly it seems like the straw was exposed to upto 248F for who knows how long...

Pasturisation obliterated, fully sterile straw is the result, no good bacteria to protect the mycelium.

or am i missing the point?


--------------------
15-jan-15 going awol to focus on a new business startup in order to finance my mushrooming.

Extras: Filter Print Post Top
Offlinesof4r0ckeRs1984
Male User Gallery


Registered: 07/30/10
Posts: 1,886
Last seen: 5 years, 9 months
Re: White mold (cobweb)in sawdust spawn [Re: GiGaBaNEuk]
    #21095648 - 01/10/15 06:04 AM (9 years, 4 months ago)

Sounds more like trichoderma to me. Does cobweb turn green?

Extras: Filter Print Post Top
InvisibleJuiceh
Dabbing All Day
 User Gallery


Registered: 09/25/12
Posts: 3,208
Re: White mold (cobweb)in sawdust spawn [Re: GiGaBaNEuk] * 1
    #21096572 - 01/10/15 10:58 AM (9 years, 4 months ago)

Quote:

GiGaBaNEuk said:
if im reading correctly it seems like the straw was exposed to upto 248F for who knows how long...

Pasturisation obliterated, fully sterile straw is the result, no good bacteria to protect the mycelium.

or am i missing the point?



Nope, he said he was making spawn. Not straw substrate.


--------------------
Trade List

How I make 15 lbs of casing in a 941. How I line 12 shoeboxes with 1 39gal bag. How I Deep Fry Cubes!
RogerRabbit said:You need a bigger pressure cooker for this hobby. RR

Extras: Filter Print Post Top
OfflineGiGaBaNEuk
Stranger
Registered: 01/07/15
Posts: 29
Last seen: 9 years, 4 months
Re: White mold (cobweb)in sawdust spawn [Re: Juiceh]
    #21096648 - 01/10/15 11:18 AM (9 years, 4 months ago)

Quote:

Juiceh said:
Quote:

GiGaBaNEuk said:
or am i missing the point?



Nope, he said he was making spawn. Not straw substrate.




Many thanks, i see now. =)
i misread the sentence structure, my fail.


--------------------
15-jan-15 going awol to focus on a new business startup in order to finance my mushrooming.

Extras: Filter Print Post Top
Offlineknomadic_niki
A mile high
 User Gallery


Registered: 06/30/14
Posts: 1,275
Loc: 6200' Colorado
Last seen: 6 years, 9 months
Re: White mold (cobweb)in sawdust spawn [Re: GiGaBaNEuk] * 1
    #21096717 - 01/10/15 11:39 AM (9 years, 4 months ago)

i see your point, solarity. yes, it was an oddly worded request with no details or photos and the OP has not returned to clarify things. we can only speculate


--------------------
My trade list

In search of sporeless oyster cultures

Extras: Filter Print Post Top
Jump to top Pages: 1

Shop: Myyco.com Isolated Cubensis Liquid Culture For Sale   OlympusMyco.com Olympus Myco Bulk Substrate   Mushroom-Hut Grow Bags   MagicBag.co Certified Organic All-In-One Grow Bags   PhytoExtractum Buy Bali Kratom Powder   North Spore Bulk Substrate


Similar ThreadsPosterViewsRepliesLast post
* sawdust spawn viability? shroomaker 1,239 4 05/02/05 11:43 AM
by Corporal Kielbasa
* problems with sawdust spawn.. mattymonkey 5,288 3 07/06/05 04:56 AM
by Mindzpore
* spawn question hippy_lettuce 2,066 2 03/21/02 07:33 PM
by hippy_lettuce
* lion's mane: liquid to sawdust
( 1 2 all )
fungophiliac 9,019 22 05/31/05 10:51 PM
by fungophiliac
* sawdust packer and paraffin wax THEDANGLER 2,501 12 04/22/05 01:38 PM
by THEDANGLER
* Contamination from Spawn that is fruiting Yummymush 1,157 3 03/03/05 04:19 PM
by Yummymush
* Making Plug Spawn Ganoderma 21,734 10 09/24/03 10:46 AM
by Paid
* What to do with morel spawn? Suntzu 2,926 4 05/19/01 05:19 PM
by Suntzu

Extra information
You cannot start new topics / You cannot reply to topics
HTML is disabled / BBCode is enabled
Moderator: RogerRabbit, Pastywhyte, Forrester, Stromrider, SHROOMSISAY01
1,109 topic views. 1 members, 3 guests and 1 web crawlers are browsing this forum.
[ Show Images Only | Sort by Score | Print Topic ]
Search this thread:

Copyright 1997-2024 Mind Media. Some rights reserved.

Generated in 0.018 seconds spending 0.004 seconds on 12 queries.