Progress report on mosaic resistance / Leonard J. Alexander -- Consumer's quality rating of greenhouse, vine ripe and tube tomatoes / Sabbah Al Haj -- Analysis of factors affecting week-to-week variations in retail margins for greenhouse tomatoes / Joseph D. Brown -- A comparison of two new hybrids and three new varieties with Ohio WR-7 / Walter N. Brown and E. K. Alban -- How much nitrogen does a tomato plant require? / Freeman S. Howlett and Dale W. Kretchman -- Important considerations concerning carbon dioxide enrichment of greenhouse atmospheres / D. W. Kretchman and F. S. Howlett -- Where are new fungicides? / Curt Leben -- Fifty years of greenhouse insect control / Ralph B. Neiswander -- Temperature and moisture and its effect on some greenhouse tomato diseases / R. E. Partyka -- Genetic control of insects / Roy W. Rings