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Zucchini, Normal or Powdery Mildew?  (With pics) Toplef10Zucchini, Normal or Powdery Mildew?  (With pics) 1zd3ho10

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Zucchini, Normal or Powdery Mildew?  (With pics) I22gcj10Zucchini, Normal or Powdery Mildew?  (With pics) 14dhcg10

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Zucchini, Normal or Powdery Mildew?  (With pics) Toplef10Zucchini, Normal or Powdery Mildew?  (With pics) 1zd3ho10

Hello Guest!
Welcome to the official Square Foot Gardening Forum.
There's lots to learn here by reading as a guest. However, if you become a member (it's free, ad free and spam-free) you'll have access to our large vermiculite databases, our seed exchange spreadsheets, Mel's Mix calculator, and many more members' pictures in the Gallery. Enjoy.

Zucchini, Normal or Powdery Mildew?  (With pics) I22gcj10Zucchini, Normal or Powdery Mildew?  (With pics) 14dhcg10

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Zucchini, Normal or Powdery Mildew? (With pics)

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Post  No_Such_Reality 7/2/2016, 12:33 am

Or maybe here in Southern California that would be titled, Zucchini, Normal Powdery Mildew?

Anyway, only my second year growing Zucchinis.

Is this normal early mottled leaves or is this the beginning of powdery mildew?   Or something else.

Here around Disneyland in OC, a lot of people call it powdery mildew and it blights everything with a large leaf from trees to squash.  

Here's the photos.  Two newer plants transplanted a few weeks ago into the bed by the corn and peppers. Yep, they're crowded but the bed really is down to two pepper,  a single beat and the to zukes.  The corn is tried stalks that are being used by the grapes as a trellis. 

The pictures make it look more white, in real life it looks more silver. Smooth, not rough, feels like normal leaf. Back of the leaves are undamaged, nothing on them, not bugs.

Zucchini, Normal or Powdery Mildew?  (With pics) Fullsi12

Second leave more advanced?
Zucchini, Normal or Powdery Mildew?  (With pics) Fullsi11

Third leaf, about to go under?
Zucchini, Normal or Powdery Mildew?  (With pics) Fullsi13
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Post  camprn 7/2/2016, 3:44 pm

THat looks like normal coloration to me. Turn the leaf over to see if there are any lesions on the underside.

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Post  No_Such_Reality 7/2/2016, 5:32 pm

There's nothing on the back side, the underside is a completely normal leaf.

Here's an updated photo from this morning with the marine layer cloud cover in.  

Zucchini, Normal or Powdery Mildew?  (With pics) Img_3310

The three mottled looking leaves in the pic are the three leaves in the prior pictures. Just AM/PM light difference.

The mottled pattern is about the way the leaves eventually go bad out here.

I think it's normal coloration variation.  All three leaves go back to the stalk on the left.
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Post  Scorpio Rising 7/2/2016, 8:28 pm

Doesn't look like PM. to me either. PM is kinda....powdery.

https://www.google.com/search?hl=en&site=imghp&tbm=isch&source=hp&biw=980&bih=642&q=powdery+mildew+on+squash&oq=powdery+mildew+on+&gs_l=img.1.4.0l10.8762.14466.0.17919.18.10.0.8.8.0.172.1020.0j8.8.0....0...1ac.1.64.img..2.16.1140.NZbJfiXinYA#imgrc=G38fX9tRv25hHM%3A

If in doubt, squirt it with milk and water 50:50 in a sprayer. Won't hurt anything. But it really doesn't look like a disease to me.
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Post  FeedMeSeeMore 7/2/2016, 8:36 pm

Mine has the same thing and so far it hasn't slowed the plant up at all.
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Post  audrey.jeanne.roberts 7/3/2016, 1:13 am

I have the same type leaves on several of my zucchini - I always think it might be powdery mildew early on then just realize it's the normal silvery touch on those leaves.

I think you'll be good!
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Post  BeetlesPerSqFt 7/6/2016, 12:20 am

I had the same concern last year, but ultimately decided it was too symmetrical for a fungal infection. (The zucchini last year did eventually get mildew, but managed to grow faster than I had to remove badly infected/damaged leaves, right up to frost.) My zucchini this year has that silver pattern, too, and it doesn't have any other signs of illness yet.
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Post  No_Such_Reality 7/7/2016, 10:37 am

Plant still doing fine, so I'll chalk it up to normal leaf pattern.
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