what's worng with my butternut squash plants?

Question

here are 3 pics of 3 butternut squash plants. Some have spotted white leaves, some have nearly all white leaves and the 3rd has a combo of both. I live in Southern CA. Are these squash plants diseased? If so, are they able to be saved or should they be dug up and replaced with new healthy plants?
http://i229.photobucket.com/albums/ee73/stella_toddler/plant_3.jpg
http://i229.photobucket.com/albums/ee73/stella_toddler/plant2.jpg
http://i229.photobucket.com/albums/ee73/stella_toddler/plant_1.jpg

Answer 1

I couldn't see the pix, but it sounds like they have powdery mildew. It can be caused by too much water, or sometimes the mildew spores are in the soil and you just need to put the plants in another location next year. There isn't much you can do about the mildew once it's attacked the plants. Prevention by spraying with a mildewcide/herbicide is the only thing you can do. Replace these plants and start over.

Answer 2

Looks like mildew. Do not water the leaves, especially at night. Flood/soak irrigate early in the day.

These plants should recover. You could spray with some copper sulfate. Don't know if you need to.

Water deeply and less often. The squash should still grow nice.

Answer 3

classic spider mite indicators. Are the plant life being grown indoors? Spider mites thrive in warm, dry situations. elevating the humidity is a sturdy thank you to deter them. place shallow trays with pebbles, packed with water around the area, so the water can evaporate. Spraying with water many times facilitates too. Any insecticide with thiacloprid or imidacloprid in it additionally gets rid, yet those chemical components are at present below examine for their ability to wreck honeybees and make a contribution to Colony cave in affliction, so i would be unable to in all honesty propose which you employ them. Spider mites are resistant to maximum different chemical components, in spite of the incontrovertible fact that, so as that they are complicated little buggers to get long gone. i glance after some super glasshouses as area of my interest, and am experimenting with countless effortless techniques to handle the spider mite difficulty. I surely have some straw bales soaking, waiting to plant candy potatoes into. This has had a knock-on consequence of dramatically elevating the humidity in that distinctive glasshouse.

Answer 4

from what I remember, that is a spore(use a fungicide on it. also do not water your plants in the evening. That is probably how you got it.