Could be a Buddleia leaf weevil, Cleopus japonicus, considered to be a bioloogical control for the invasiveness of butterfly bushes, particularly in NZ and Australia where the plants are noxious weeds. I am not aware of them being very common in the US but perhaps they are being employed for the same purpose (Buddleia is an invasive species on the west coast and beginning to become one in other areas). And the only garden weevil I am aware of that can fly!

Hi Tracy, I took the plants out of the soil and washed the roots. They were also suffering from a mealybug infestation, so there was damage to the leaves -- some were yellowing and dying -- but I'm not sure if that was caused by the mealybugs or the yellow fungus stuff. I've found similar yellow stuff in a couple other pots. This pot had the most extensive infestation. The soil was moist, but not soaking wet. I removed the mealybugs, removed damaged leaves and stems and washed the roots of the plant. The root system didn't appear out of the ordinary. The yellow fungus is not visible until I dig up the plants because it's underground around the roots. Some of the stems on the plant (Portulaca Molokiniesis) were shriveling, but, again, I don't know if that was because of the mealybugs.

I do not recognize this so I Googled it. This might be helpful https://www.google.com/search?q=black+spots+citrus+leaves&biw=1680&bih=857&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjYltv_39nQAhXCRSYKHXBhDDIQ_AUIBigB#imgrc=3GynaX0KoECnTM%3A

Hmm...that looks like what I thought was black citrus aphids on my Ponkan which I wrote about in another post. It is strange how it keeps going after that one tree. I keep spraying and cleaning it off with oil spray or soapy spray but it keeps reappearing. I hope it does not spread to my other trees. The new leaves are beginning to harden up on the tree now so I hope the bug will soon give up on it, but also am afraid it will start looking at the new growrh on my other trees. I treat them all with the sprays. I can't figure out where they are coming from as I don't see any ants nor what about it that attracts them to that particular tree. I have another Ponkan at the other end of the greenhouse and so far that is not attracting them. I think maybe that is because that tree gets a lot of air movement as it is nearer a fan. I keep suspecting my hibiscus may be the host as I usually keep them away from my other plants as they are notorious bug magnets, but even they seem bug free so far and not near this particular tree. Maybe they are in the soil of that particular tree, but I have even drenched the soil and I am still getting the black aphid or black fly back for now about 2 months. It is interesting to me that it likes that particular tree. Cory