C. H. Middleton
A serious disease attacking roses is called black spot, which shows itself in the form of dark spots and blotches on the leaves. In bad cases it defoliates and kills the bush. The best remedy for this disease, and for antirrhinum rust, sweet-pea streak, and so forth, will be given to listeners today when ' gardening-doctor ' C. H. Middleton brings to the microphone ' specialist' D. E. Green , of the Royal Horticultural Gardens, Wisley.