I am based in the UK and have two small citrus, of an unknown variety, that I keep year round in my conservatory. I have a large Tahiti lime, Eureka lemon and Mandarin orange outside which have had a good summer.
The two small conservatory plants are riddled with scale. I have tried wiping off the worst, spraying with pesticide and using horticultural oil but am losing the battle at the moment. I have three questions:
1) Is the battel against the scale pointless .... or can I win out?
2) If I ditch these plants and get two new ones is the scale likely to return. No other plants in the conservatory seem to show any sign.
3) If I move my outdoor plants in briefly during the coldest part of winter are they also likely to develop scale.
Hope you can help - really want some small citrus in my conservatory but struggling.