Hmmm...to start, heavy feeders. How is your fert regime/soil nutrition?

Dam

thanks, I have another Charentais growing beside this one (same conditions) and it doesn't have these light green patches.

Thanks, my point is that it looks like deficiency. Or air pollution.

Dan

Or herbicide (aka weed killer), even though unintended and/or accidental.

hmmm I would go with the nutrient deficiency but my cucumbers, pumpkins and zucchini are growing in exactly the same conditions and on the same watering schedule etc and are all fine.

{{gwi:109682}}

and here is another Charentais growing beside it, same seed source, planted same time, same waterig and fertalizer etc

Could it be some sort of virus?

Now that top one looks like a virus, surely, maybe some sort of mosaic off the top of my head.

Dan

Looks like CMV (cucumber mosaic virus), to me. Charentais is prone to this disease.

Thanks, its gotten worse since first pic was taken, decided to destroy it.

That's all you can do. Bleach anything that might come in contact with seeds, soil, utensils, etc.

Dan

to late it has spread to pumpkins and other melon plants :(

If it is of any consolation, others will learn from your photographs and from your experience. So sorry for your losses.

True, I was thinking about ripping everything out and starting again, but for my own knowledge and hopefully others I will take lots of photos and document the progress.