Powdery Mildew?

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Koutz7

Member
Hey guys just wondering if this is what I think it is...powdery mildew or is it nothing. If it is mildew what the hell do I do. From what I see it’s only my one plant affected. Should I cut the bottom leaves off that are affected. Plants are not getting any nuts yet so I don’t know what else it could be.

many opinions greatly appreciated.

last picture is of the second plant that doesn’t not look affected
 

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K

Koutz7

Member
Also I cannot wipe whatever it is off of the leaves so that leaves me to believe it’s not powdery mildew?
 
S

spek9

Well-Known Member
Renfro said:
Definitely not PM. Perhaps a calcium deficiency?
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Seems slightly odd for Ca def though IMHO. It's not typical at least.

One of the pics has the appearance of possible Thrip damage I'm thinking (pic #3, bottom of the leaf pointing down). I've never had Thrips though, so it's an educated guess only.
 
Renfro

Renfro

Well-Known Member
spek9 said:
Seems slightly odd for Ca def though IMHO. It's not typical at least.

One of the pics has the appearance of possible Thrip damage I'm thinking (pic #3, bottom of the leaf pointing down). I've never had Thrips though, so it's an educated guess only.
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Agree
 
Renfro

Renfro

Well-Known Member
Honestly the fact the damage is localized to those older fan leaves and is not present on the newer growth would lead me to believe that if pests were responsible they haven't been present for a while.

Did it appear recently or has it been there a while? If it's been around a while and hasn't spread since then possibly pest related but the pest is gone now. If it appeared recently and is only on those lower leaves then I suspect some type of a deficiency as sometimes those present on the lower/older fan leaves.
 
K

Koutz7

Member
Renfro said:
Honestly the fact the damage is localized to those older fan leaves and is not present on the newer growth would lead me to believe that if pests were responsible they haven't been present for a while.

Did it appear recently or has it been there a while? If it's been around a while and hasn't spread since then possibly pest related but the pest is gone now. If it appeared recently and is only on those lower leaves then I suspect some type of a deficiency as sometimes those present on the lower/older fan leaves.
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I only noticed it last night. And it’s only on the bottom 4 leaves around the plant. The second plant hasn’t been affected what so ever. I have been fighting a very very minor fungus gnat issue but I don’t believe this is the issue.

this photo I’ve attached was taken Sunday of the plant in question and as you can see there is nothing that be seen on the leaves.
 

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Renfro

Renfro

Well-Known Member
Koutz7 said:
I only noticed it last night.
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Then I am back to the calcium deficiency, not a typical or classic presentation of a calcium deficiency but they can look like that.

Are you using RO water and not using calmag?

Make sure those fungus gnats aren't actually winged root aphids.
 
K

Koutz7

Member
Renfro said:
Then I am back to the calcium deficiency, not a typical or classic presentation of a calcium deficiency but they can look like that.

Are you using RO water and not using calmag?

Make sure those fungus gnats aren't actually winged root aphids.
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I’m not using RO water. I’ve just been using tap water and was measuring the PH but my Ph meter broke and I’m waiting on the arrival of a replacement. Tonight it looks like under the lights the leaves have red or orange spots. Still only the 4 leaves affected and the other plant besides showing signs of overwater is looking fine. I’ve attached pictures of both plants with lights on and off. First set of pictures is plant in question. The crack in the leaf is from me being a little too rough.

still nothing on the second plant which is last picture
 

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Renfro

Renfro

Well-Known Member
Doesn't look like a rust fungus or other fungus or mildew that I am aware of. Looks like a deficiency that is spreading.
 
Renfro

Renfro

Well-Known Member
Are you feeding it? What medium is that? They are at that age where the seed reserves are exhausted and they need nutrients.
 
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