I've grown a bougainvillier in my greenhouse successfully for several years, but for the last couple of summers it's become invested with melebug. I think the greenhouse may be too hot for it, but because if it's size, it's difficult to put it outside in the summer, and then back in again for the winter. The place where I bought it recommended spraying it with a mixture of metholated spirits and water, but this has had no effect. Any suggestions for a melebug cure would be gratefully received.