I've had a nice large bay bush on my terrace, about 4 feet tall, and it;s been there for probably 15 or 20 years.
This year i noticed it wasn;t doing well and on closer examination i found these large (1/2 inch) stark white bugs that look almost like funny seashells (their backs are sort of ridged, and their heads seem hidden).
I sprayed them with dish detergent and they died, and i pruned off all the places where their carcasses remained, figuring there may be eggs.
Now i noticed that some of the branches they were on are hollow and it seems other white things are about to emerge from the hole. Shyould i throw out the plant, not to contaminate my other plants (I have a lemon and an olive, and all kinds of other things)?
What, if anything, can be done.
I found on internet something about "cocciniglie" (koh- chee- nee-lyeh) which looks like these and says they make red dye from them (yes, for food). yuck
(the article recommends insecticides)