Upper left: The streaks in a normally pink gladiolus result from a virus disease. Upper right: Streaked color pattern in a normally red tulip indicates virus disease. Lower left: A virus infection causes the yellow and green rings in a camellia leaf. Lower right: The fungus Curvularia blights leaves, stems, and flowers of gladiolus.

PHILIP BRIERLEY, a senior pathologist in the Bureau of Plant Industry, Soils, and Agricultural Engineering, has been employed by the Department of Agriculture since 1922.

FLOYD F. SMITH is a senior entomologist in the Bureau of Entomology and Plant Quarantine. For many years he has done research on insects that affect greenhouse and ornamental plants. He holds degrees from Ohio State University.

FRANK P. MCWHORTER in 1930 entered cooperative employment by the Oregon Agricultural Experiment Station and the United States Department of Agriculture. Since then he has specialized in virus diseases of bulb and legume crops.