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OfflineDrCubensis
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Pesticides in coffee grounds absorved by Pleurotus ostreatus?
    #20978154 - 12/15/14 05:21 AM (9 years, 5 months ago)

Hello. I'm about to make an experiment cultivating pleurotus ostreatus from colonized grain using an experimental "Bucket tek" with cardboard and spent coffee grounds.

I have read that coffee cultivation uses much pesticides. I'm worried about the mushrooms growing on that spent coffee grounds may absorb them and end in my body, what do you think about this?

Spent coffee grounds are a waste and readily available here, it's interesting to recycle them to make mushrooms.


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InvisibleMr. Alien
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Re: Pesticides in coffee grounds absorved by Pleurotus ostreatus? [Re: DrCubensis]
    #20978721 - 12/15/14 09:48 AM (9 years, 5 months ago)

I don't think bucket tek gonna work with coffee grounds, it only work properly if you're using coir, verm and gypsum.

I'm also worried about the wheat that i use for making my spawn, I suspect they use pesticides to cultivate the grains as well. I heard RR said that mushrooms can absorb directly pesticides if you mist the mushrooms with it, and that if you have bugs in your mushrooms don't even bother to use pesticides, DON'T USE THEM.

But misting pesticides on mushrooms is a very different thing than using grains for spawn or coffee (bulk) that were treated with pesticides in the cultivation stage of the grains. If the grains fit for human consumption then you can use them for mushrooms too... right?

Stamets said that mycelium only absorbs heavy metals like mercury? So, as long the pesticides they use for the cultivation of grains or coffee, don't contain any heavy metal they won't absorb anything bad?

Anyway.... Any more thoughts anyone?

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Offlinemycoloco
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Re: Pesticides in coffee grounds absorved by Pleurotus ostreatus? [Re: DrCubensis]
    #20978811 - 12/15/14 10:08 AM (9 years, 5 months ago)

I'd be more worried about what's in the cardboard.


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OfflinePinsetter
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Re: Pesticides in coffee grounds absorved by Pleurotus ostreatus? [Re: Mr. Alien]
    #20978880 - 12/15/14 10:24 AM (9 years, 5 months ago)

Oysters apparently can absorb the caffeine from the coffee http://www.shroomery.org/forums/showflat.php/Number/6826598 it does make me nervous a bit regarding what else they may fix besides heavy metals?

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OfflineDrCubensis
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Registered: 07/03/05
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Re: Pesticides in coffee grounds absorved by Pleurotus ostreatus? [Re: Pinsetter]
    #20979371 - 12/15/14 12:26 PM (9 years, 5 months ago)

Thank you for the replies. Definitely I'll ditch the cardboard.

RR & coffee grounds with vermiculite (2005): http://www.shroomery.org/forums/showflat.php/Number/3859776#3859776


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"Ever tried. Ever failed. Never mind. Try again. Fail again. Fail better." Samuel Beckett.

Edited by DrCubensis (12/15/14 12:35 PM)

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OfflineForresterM
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Re: Pesticides in coffee grounds absorved by Pleurotus ostreatus? [Re: DrCubensis]
    #20982523 - 12/15/14 11:17 PM (9 years, 5 months ago)

Quote:

DrCubensis said:
I have read that coffee cultivation uses much pesticides. I'm worried about the mushrooms growing on that spent coffee grounds may absorb them and end in my body, what do you think about this?




I would imagine most of the pesticides used in the coffee would be leeched out in the coffee making process and ingested by the hordes of Starbucks (or Dunkin' Donuts if you're on the east coast) customers. 
The little that would be left are probably broken down into less harmful compounds, as many different types of fungus do to many different types of compounds. 

Considering the percentage of your diet that said mushrooms are going to comprise, I would worry about other things first, like making sure your staple foods are organic and non-GMO, rather than a super tiny amount of pesticides that might end up in a few mushrooms that you grow and eat.
Just my opinion though :wink:


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