DSLR are very expensive to use to take macro shots, I use a Canon Powershot A470 which takes great macro shots in my opinion and it a 7MP.
It's affordable which is a plus for me.

I will post these and I'm not sure which is best, someone give me some input and I'll narrow it down.

Would anyone be interested in seeing a L.W. v. Texana graft or one on it's own roots, I can snap a quick picture.

P. haselbergii?

You don't want dead plant matter in your soil, it attracts pests.

I'm not familiar with what you call mineral soil, wouldn't that be basically sand, clay, etc.
Or mineral soil like soil that was picked up after controlled burns where the top layer is decaying matter, I've heard it used both ways.

Nice seedlings by the way.

Good stuff, I have a few grafts in the waiting chamber, I'll post some pictures if any of them take.

No, that is not. I am familiar with their guide, but with seedlings it seems a bit dangerous to simply place in cabinet considering there is nothing affixing it to the stock plant. It could slide off, but still that is good luck, con-grafts!

What sort of systematic would you recommend then for those of us in the US. IT seems that the majority of products would be expensive such as neem oil to use, and neem oil isn't really systematic either.

Nice, they seem very centered on the cut, the vascular tissue of Opuntia is a bit confusing.
Perhaps you could write a how you did this, steps, amount of humidity, things like that. None of my Opuntia to globular cacti grafts seem to like to take.

Wouldn't malathion be just as useful, you could apply that once a year and as long as it's not a plant who's fruit you intend to eat it should be successful. Malathion kills pretty much everything and it lasts.

I would say Matucana but I'm not set on it, this will take research.

My best guess is some kind of beetle? I don't know of beetle's that molt though so someone better versed in this field would be an asset.

You must have went to the same NAPA as me, when I said that they yelled out kitty litter.

Looks like a molt to me.

One word, malathion. You will never have an issue with mealy bugs, scale insects and the likes every again. Only use with plants not intended for consumption.