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Invisiblegopener
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Fungicide for cactus seedlings
    #19034768 - 10/26/13 09:30 AM (10 years, 3 months ago)

I got some seedling trays with cactus, and it starts to grow algae there.

I bought a fungicide, Fosetyl AL 80%.
I am thinking to myst with 1/2 strength, one time per week.
Is that a good plan?Or i would kill my seedlings?


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Invisibleanne halonium
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Re: Fungicide for cactus seedlings [Re: gopener] * 1
    #19035057 - 10/26/13 10:52 AM (10 years, 3 months ago)

hmmm

rather than create the perfect conditions for algae, and use biocides,
instead just create  perfect conditions to grow cacti.

i see this as enviro control, and seed skill handling issue.

lets see what the other panelists have to say on this,
and, then if needed, ill show ya how to do seeds.



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Edited by anne halonium (10/26/13 10:56 AM)


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OfflineGoOnThen
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Re: Fungicide for cactus seedlings [Re: gopener]
    #19035204 - 10/26/13 11:26 AM (10 years, 3 months ago)

I would suggest you post some pics of what you have growing as I don't think spraying algae with a fungicide is going to help much.
I have used mancozeb fungicide before on young seedlings and it did stunt them but didn't kill them. I used it because I had a out break of a couple of different fungus's and peroxide wasn't making any difference.
I do use a product called Fongarid but I use it when I sow the seeds not after they have germinated.
Depending how old your seedlings are you can let the surface dry out which should knock algae back but be careful if they are very small.

CheersGot


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Invisiblekarode13Facebook
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Re: Fungicide for cactus seedlings [Re: gopener]
    #19037525 - 10/26/13 08:01 PM (10 years, 3 months ago)

I agree Got, a fungicide wont do much to algae. OP needs an Algaecide, something with Benzalkonium chloride would do the job. Same active chemical they sometimes use on wound wipes in first aid kits. When using any chemical for the first time it's wise to test on a few plants first and always at the lowest rate, as stated on the label.

I would personally just vent more often and also a covering of coarse sand should help with control. If possible scrape the top layer off containing the algae and replace with fresh potting soil.


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Invisiblegopener
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Re: Fungicide for cactus seedlings [Re: karode13]
    #19039014 - 10/27/13 01:14 AM (10 years, 3 months ago)

Thanks guys for the replies.

I have algae on top, in 2 trays and on bottom in other 2 trays..
I am a bit concern because i can see, the one that grows on top, it grows pretty fast.

That, i guess, start happens when i myst heavily the trays with water, witch i have to say they have bottom holes for drainage.
I can post pics latter today.

You guys think, that Fosetyl wont do the trick?


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Invisiblegopener
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Re: Fungicide for cactus seedlings [Re: gopener]
    #19073325 - 11/02/13 01:42 AM (10 years, 2 months ago)

I graft one seedling to save it, and spray the other tray with the fungicide.

Now i can see, in a different tray, starts to grow algae...
Can anyone tell me if i can save them?How??:sad:


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Invisiblepsi
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Re: Fungicide for cactus seedlings [Re: gopener]
    #19074171 - 11/02/13 09:13 AM (10 years, 2 months ago)

I've never paid much attention to algae/moss in seedling trays. It doesn't seem to harm them that I've noticed, and it dies back when conditions get dry.


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InvisibleT-Funkadelic
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Re: Fungicide for cactus seedlings [Re: psi]
    #19074281 - 11/02/13 09:40 AM (10 years, 2 months ago)

This is my first attempt growing peyote from seeds and these look stretched out im just wondering if this is normal im using one 13w 3600k about two foot away.


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Offlineintelligentlife
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Re: Fungicide for cactus seedlings [Re: psi]
    #19074282 - 11/02/13 09:40 AM (10 years, 2 months ago)

That is very normal to peyote, I have got also randomly some growing "etiolated" and seedlings next to it are cobular. They will turn cobular later on. It's possible cause peyote seedlings will grow somewhere at cracks of earth or so.. In habitat that kind of growth style is benefit for cactus if it's growing between the rocks or so. I would not be worry about these seedlings, they will turn regular and you can add layer of rocks to surface to keep them up if you want to. But you can let them be and grow on their own like that.

....

I have got moss few times at seedlings tray, no harm to seedlings.

Only mold seems to harm small seedlings. I have notice moss can be even benefit for seedlings, I don't know is there any benefits or not but I have seen healthy seedlings even there are big greenish moss layer at surface of soil.

Mold I should keep away from seedlings but anyway, mold can be easily get rid of by giving air circulation for small seedlings.. I use always from beginning trays with air circulation by opening bag two or maybe three times a day. Also I have find out seedling rising from pot what I don't water or keep moist most of the time and still seedling has been surprise me by emerging from the rocky surface of cactus pot.


Anyway.. I don't keep seedlings so humid and open bags or domes holding humid air more often.. Also I use bags with holes from day one, there will be still humidity enough to cause seeds germinate and seedlings grow also I let surface of soil dry after one month and then spray again so there will sprout some seedlings more.. I don't know why some seeds doesn't germinate after first contact on moist soil.. Some seems to need dry surface and watered again before they germinate.

I have now actually some greenish moss at trichocereus seedling trays, but no mold.. Seedlings are fine. My lophophora diffusa seedlings has got many times dry soil surface cause I have forgot to spray more water to them to surface of soil. I have notice new germinated seeds and new seedlings after small water spray to surface when it has go dry from top. They are below 2 month old and has already got lots of dry periods and they seems fine. I water them randomly when I see they have dry surface.

Some people keep moisture bag very long time but I have not seen necessary to keep it totally closed and constantly humid. Priority is they are most of the time at humid environment. Some seedlings, like the one at picture do not seems to need any humidity at all.


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Edited by intelligentlife (11/02/13 09:43 AM)


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Invisiblepsi
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Re: Fungicide for cactus seedlings [Re: T-Funkadelic]
    #19074330 - 11/02/13 09:55 AM (10 years, 2 months ago)

Quote:

T-Funkadellic said:
This is my first attempt growing peyote from seeds and these look stretched out im just wondering if this is normal im using one 13w 3600k about two foot away.




It's normal to see some stretching in seedlings like intelligentlife says, but the light source you describe is quite weak and distant. T8 shop lights work well especially for plants in trays, and they're cheap. If I was to get a fixture just for that tray of plants (assuming it's 12"x24") it would be a 2x24" T8 with 6500k tubes, placed 4-6" above the plants.

BTW it would be better to ask this in the loph growers thread since it's not really on topic for this one.


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Offlinethud thud
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Re: Fungicide for cactus seedlings [Re: gopener]
    #19077501 - 11/02/13 10:32 PM (10 years, 2 months ago)

OP: I've heard a similar question on this board before. They asked if the algae/moss was even harmful in the first place. everyone said the mossy stuff was no real worry. I think you'd be better off scraping the algae off as much as you can and ventilating it more than spraying your seedlings with some fungicide/algeacide shit.


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Invisiblekarode13Facebook
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Re: Fungicide for cactus seedlings [Re: karode13]
    #19078007 - 11/03/13 12:05 AM (10 years, 2 months ago)

Quote:

gopener said:

Can anyone tell me if i can save them?How??:sad:







Quote:

karode13 said:


I would personally just vent more often and also a covering of coarse sand should help with control. If possible scrape the top layer off containing the algae and replace with fresh potting soil.




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Invisiblegopener
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Re: Fungicide for cactus seedlings [Re: karode13]
    #19080159 - 11/03/13 12:35 PM (10 years, 2 months ago)

Thanks a lot guys!

I scratched the algae a bit and poke two holes in each tray.
I start and ventilate them every day too.

The algae didnt stop to growing, bat seems like is slowing down!

:cheers:

P.S.

I will find time to post some pictures..sorry for the non picture talking..:tongue2:


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