Contents: Introduction --- Pollination Requirements of Plants --- Reasons for Inadequacy of Wild Pollinating Insects (Increased Areas Under Cultivation – Concentrated Plantings – Rail-Fence Elimination and Heavy Grazing – Forest, Brush, and Grass Fires – The Automobile and Paved Roads – Poisoning from Insecticides) --- Value of the Honeybee in Pollinating Crops (Fruit Crops – Seed Crop – Forage Crops Grown for Seed in Oregon – Truck-Crop Plants Grown for Seed in California).
