My bell pepper plants look just like your melons with just masses of aphids and nothing will stop them for long.
I found out the hard way not to spray neem oil on bell peppers in this summer heat. The affect on the leaves was terrible. I know it can mess up tomatoes if sprayed early in the day but spraying late in the evening I never had a problem with it until I used it on my bells this year.
So far the most effective thing has been the Permethrin, DE and Dawn combo but even that won't stop them from appearing on every bit of new growth that isn't coated with it.
They haven't even bothered my tomatoes which are in adjacent beds so I guess that is a small blessing. They covered my new okra plants when they were young but seem to have slacked off on them to keep concentrating their destruction on my bells.
Bill
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