Earlier this year I moved into an apartment with an indoor garden: effectively a balcony that can be opened up in summer and closed off in winter on both the external and internal side. Unfortunately the apartment had been a viewing apartment and uninhabited in the 5 years since it had been built, and an olive tree and nerium had both been infested with scale insect. I ended up removing the nerium, but the olive tree is still infested.
I’ve tried Provanto Care sticks that you can bury around the affected plant with no luck. I’ve also gone through a couple of applications of Calypso from the same manufacturer, but it’s a neonicotinoid so now illegal to sell here in the EU and I feel a bit guilty about using it; it didn’t help anyway.
The tree itself is growing a few new leaves at the top but most of the existing are infested and dead / dying. It is sprouting at the bottom of the trunk but I’ve been trimming those back. So what would people suggest the next thing to do is? I’m thinking that pruning the affected branches heavily back before spring starts would be the best idea, along with manually rubbing any scale insect off the remaining branches so they don’t infect any new shoots. Would love to hear ideas.
The photos following were taken today, but I’ve since brushed off as many dead/dying leaves as were willing to come down, and cleared them away for disposal. The tree is obviously much older than the 5 years the apartments have existed so I’d love to get it back to full health.