mildew and/or aphids

[tnkrer]

So yesterday morning I noticed a lot of off-white powdery stuff on tomato leaves, cucumber leaves and even mint and basil leaves. Its on both sides of the leaves, but more on the top than bottom. (That is all my garden at the moment). I wiped more than 80% of the white stuff using wet paper towels. It was easily wipeable. internet search suggests that its powdery mildew, but it looks different from the pictures that I have seen. Here is how it looks. (I initially thought that it was aphid eggs .. since I started spotting 1 or 2 aphids on the underside of the leaves as well.

What is it and how do I treat it? I have not sprayed the plant with anything so far. I have daconil.

On tomato:



Another tomato branch - (I cut it out since it was touching the ground anyway)



On cuke:



Thanks