Last year my mango got scale and I fought it all year with not too much success (horticultural oil, scrubbing with toothbrushes dipped in insecticidal soap, neem oil). I noticed this week that the scale had spread to many other plants in my greenhouse and office 🙁 So I swung into action and applied the systematic imidacloprid as a soil drench. Banned in the EU for outdoor use because it is toxic to bees, I was a bit nervous. However, given it’s sub-freezing outside and I’m only applying it to indoor plants in the dead of winter and the EU ban exempts closed greenhouses, I’m hoping it won’t do too much damage to use it indoors – and hopefully stop the scale!