Powdery Mildew

C

Critical Canuck

Active Member
I have a Blueberry AK plant outdoors about 1/2 way into flower - I figure 4-5 weeks to go.
I noticed some very faint 1/4" spots on a couple of leaves. Almost looked like a light frost/frozen spot.
Looked under my scope and it looked like fine webbing. I'm guessing it may be the beginning of PW.
I only found 3 leaves with a spot or two and removed them.

I figure if I caught it soon enough it shouldn't take much to keep it at bay.
Is it safe to spray the whole plant down with baking soda or H2O2 while in flower?

I can see if I can get a sample picture tomorrow. My phone was dead when I was looking earlier so I didn't get any pics up close of the leaves.

As for a source I didn't see any obvious sources around it in the yard.. Maybe the morning glories nearby on a trellis. But I didn't see any mildew on their leaves.

Here’s the plant

78D957C9-8A4A-4315-9A5A-B1ED28DA5201.jpeg
 
Sir Napsalot

Sir Napsalot

Well-Known Member
thumper60 said:
I have used peroxide for yrs 3% no burning on leaf or bud?
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I didn't mean to imply that peroxide would visibly "burn" the leaves or flowers, despite my use of the word to describe it's action on PM. Please forgive my lack of clarity.
I also use the 3% stuff- the first time I used it without wearing gloves and it turned the skin on my fingers white
 
MICHI-CAN

MICHI-CAN

Well-Known Member
Sir Napsalot said:
I didn't mean to imply that peroxide would visibly "burn" the leaves or flowers, despite my use of the word to describe it's action on PM. Please forgive my lack of clarity.
I also use the 3% stuff- the first time I used it without wearing gloves and it turned the skin on my fingers white
Click to expand...
All good. Learning to take nothing personally here. Never learn anything if I block every person with a questionable or even malicious post. LOL.

That is actually the dead mold. But it ruined the leaves. And some tips are crispy after 2 days. Looked for more oxidized buds today. Couldn't find one. Bonus for me. Look like over ripe, dried on the plant in winter.

I use 6% diluted to 4%. Or I did. Going Regalia from start to finish next run. Just lemon juice, soy bean oil and organic soap for foliar preventative.
 
JimmiP

JimmiP

Well-Known Member
Potassium bicarbonate does work very well. I do use it in flower and have had zero issues with it harming the buds. I do go a little lighter on the mix during the flowering period though. I use it at 2tsp per gallon and add a few drops of castile soap.
 
BostonBuds

BostonBuds

Well-Known Member
I drench the plants with 1 part skim milk and 9 parts tap water, use a pump type sprayer hitting every part so it drips off. I will spray first thing in the morning so the sun and wind has plenty of time to thoroughly dry it. The plants seem to tolerate it well and I haven't noticed any negative effects other than some dry milk residue dried on the leaves. It does seem to come back so a respray is needed, last spray was over a week ago and haven't noticed it back yet. It is getting closer to harvest and i will be doing a 3 part wash then also with baking soda/fresh lemon juice/tap water then hydrogen peroxide/tap water then rinse thoroughly.
 
Iheartoregon

Iheartoregon

Active Member
I too am starting to see some mold starting on a few of the leaves on my plant. I’ve attached pictures. Can someone confirm if this is mold? It’s been hard to distinguish between mold and water droplets that have hit ash on my plant. Im fairly certain this is mold though.

should I spray with the 30% milk 70% mixture? If I do this, am I hitting the whole plant? Or would it be sufficient to just keep removing the leaves that get affected? Orrrrr should I just start thinning it out a bit as it’s several weeks into flower and only has two weeks or so left to go. Any advice is really really appreciated. Thanks everyone!
 

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Iheartoregon

Iheartoregon

Active Member
Iheartoregon said:
I too am starting to see some mold starting on a few of the leaves on my plant. I’ve attached pictures. Can someone confirm if this is mold? It’s been hard to distinguish between mold and water droplets that have hit ash on my plant. Im fairly certain this is mold though.

should I spray with the 30% milk 70% mixture? If I do this, am I hitting the whole plant? Or would it be sufficient to just keep removing the leaves that get affected? Orrrrr should I just start thinning it out a bit as it’s several weeks into flower and only has two weeks or so left to go. Any advice is really really appreciated. Thanks everyone!
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OR.....should I just harvest it at this point so it’s not a complete loss? I lost my plant last year to mold/bud rot too :’(
 
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