What is going on with the squash leaves?

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A couple of my squash have developed yellowing patches and dry edges. I had originally thought it was from a dry weekend where we went away and had not watered in about a week. It's been in the upper 80's and 90's in dry, windy Southern California, so a lot of the plants were thirsty when we came back.

However, most bounced back. These squash seem to have a little more difficulty. They are a hybrid between a butternut and acorn, I was given the seeds from a friend. Any ideas?

Fertilizing with organic veggie fertilizer every three weeks, last week we used home-made kelp fertilizer. Watering about every 3-4 days. The soil was very fertile topsoil/compost.
 

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A couple of my squash have developed yellowing patches and dry edges. I had originally thought it was from a dry weekend where we went away and had not watered in about a week. It's been in the upper 80's and 90's in dry, windy Southern California, so a lot of the plants were thirsty when we came back.

However, most bounced back. These squash seem to have a little more difficulty. They are a hybrid between a butternut and acorn, I was given the seeds from a friend. Any ideas?

Fertilizing with organic veggie fertilizer every three weeks, last week we used home-made kelp fertilizer. Watering about every 3-4 days. The soil was very fertile topsoil/compost.
That looks like a watering issue. Either too often or too little. Probably too often. The soil looks excellent and therefore able to retain deep moisture. When you water do you give the plant a long slow complete soaking or just until water starts to stand on the surface.
 

Jan

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It looks like Leaf Miner damage. The new untouched leaves look good.
 
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We deep water. The other, larger squash near by that get the same amount of water are doing just fine, so I thought it might have been a disease. Only two of the 6 squash (they are inter planted with corn) have the yellow and drying leaves. Every 4 days without water, if you dig down 6" it's as dry as a bone.
 

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