Could be mites, can't see them, but even on my own trees I can't see them. I usually guess they are present by the damage, and your photo is consistent with mite damage. I say mite, because there's several varieties, spider mites, flat mites, false spider mites, all do similar damage and all are cured the same ways.
The two insecticides you photographed will not be effective. Why? Because the active ingredients are listed for insects, not arachnids. Mites are related to spiders, and have a biochemistry that is quite different from insects. READ THE LABELS. You want a product that specifically lists spider mites. If the labels do not say effective against spider mites, it probably won't work.
All mite varieties are killed by the same miticides that kill spider mites.