I gave my infected hoya a good bath in soapy water. Kept the roots out of the water as the plant soaked for maybe two days. Then I gave the soil a 'Sevin' soda.
Knock on wood, the plant seems to be clear of problems now and it's been over a month.
I had a trailing hoya, very small leaves think it was H. minima. Much to my disgust it ended up covered in mealy bugs so I tried dabbing them with rubbing alcohol, I was fighting a losing battle .
It was the first year it was going to flower so I was persevering with the alcohol treatment. When it flowered the scent especially at night was overpowering, smelt like Noxzema. DH was not impressed so I hung it outside, this was in August.
Low and behold a week later all the mealy bug was gone, not a sign of it, that had me scratching my head until one morning I saw two or three yellow jackets crawling over the leaves and flowers, they had cleaned every single mealy bug off and were looking for more. Whats more they must have pollinated one of the flowers because I ended up with a long seed pod. So I guess yellow jackets are good for something after all.
Annette