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Square Foot Gardening Forum
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Is this powdery mildew?  Toplef10Is this powdery mildew?  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.

Is this powdery mildew?  I22gcj10Is this powdery mildew?  14dhcg10

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Is this powdery mildew?

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Is this powdery mildew?  Empty Is this powdery mildew?

Post  HPartin 5/23/2011, 2:22 pm

Will you see "powder" on the leaves if it has powdery mildew? My squash has come down with something--any guesses? I don't see anything powdery on leaves.

Is this powdery mildew?  102_0416


Is this powdery mildew?  102_0417

Is this powdery mildew?  102_0418
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HPartin

Female Posts : 120
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Post  HPartin 5/24/2011, 6:47 am

Knock, knock, anyone there?
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HPartin

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Post  Blackrose 5/24/2011, 10:01 am

I would guess that since there isn't any mildew on the leaves, you don't have powdery mildew. My suggestions would be to check the stems and make sure you don't have squash vine borers and then maybe do a soil test to see if you have a nutrient deficiency.

How many different kinds of compost makes up your Mel's Mix?
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Post  HPartin 5/24/2011, 10:35 am

I checked for squash borers. That was actually my first guess. I've been just sitting around waiting for those guys to show up for the party. I guess I have a nutrient issue. . We've had lots of rain and my guess is that nutrients are washing out. I fertilized it with fish fertilizer last week: 2 T per 2 gallons of water for 25 sq. feet and I don't know if this is a response to this or a whole new problem.

This is my main complaint with Mel's Mix: This is my second season and both times I have had nutrient issues. My first 3 boxes had 4 compost components and I had nitrogen problems and ph issues. The 2nd set of 3 were mixed with 6 (black Kow, mushroom, garden, forest, worm, and Bumper Crop) and looks like I have the same issues. I tested the soil after mixing and it looked really good. But I seem to have the same results. Yellow leaves and slow growth in squash, green peppers, eggplant and green beans. My tomato plants are turning yellow which looks like it might be an iron deficiency. I'm just a little tired of problem solving soil. I'm not even into bugs yet :scratch:
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Post  FarmerValerie 5/24/2011, 10:48 am

Sorry for not resonding earlier, I needed more coffee. My crookneck, some of them, are doing the same thing, unfortunately they are in boxes without MM (long story), so I really cannot compare that issue. It may be that you got some compost that was not fully composted. I know you said it's not bug time yet, but you may have some yellow cucumber beetles out there. They are hard to spot, and will do the same damage as the squash bug, suck the juice from the plant and leave behind a bacteria that damages the plant. I started mine from seed this year, and I over planted to insure I got some, we love the stuff, my zucchini is doing great, but the crook neck is not nearly as pretty. I have two plants I am considering pulling up, and quite possibly replanting, as we have plenty of time. If your soil test shows something is missing (we've had a wet spring in the south, nutrients may be washing away) you may want to try a compost tea. Fish emulsion is great, but may be lacking something. Also last year here was just not a good year for tomatoes and squash, it may just be a bad year there for you. I have yet to talk to someone in our area who had a good year for either plant, and that is very unusual. No one knows why it happens, it just does. I did have a plant this year that looked like the ones in your picture, I trimmed the leaves, and they started to come back.

Keep us posted.
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Post  Miss M 5/24/2011, 12:21 pm

Powdery mildew shows up as powdery white spots and splotches on the leaves. I don't see that in your pictures. I'm afraid it does look like more of a nutrient issue. You've got a good selection of composts, though, so that makes a nutrient deficiency seem unlikely. :scratch:
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Miss M

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