Recent developments in seed production in Oregon, U.S.A.

Abstract

Developments in weed control include the use of activated carbon applied in bands to protect the emerging grass seed crop from soil-applied herbicides. "Weed-seed free" crops can be produced with this technique, especially when combined with chemical seedbed treatments. Novel techniques of herbicide usage, including the roller herbicide applicator, are being used for weed control. Field burning is important for disease control and techniques of smoke management are improving. Aerial inspections of seed crops by seed certification inspectors are faster and are considered to be as thorough as ground inspections. Seed growers can be classified as either high- or low-cost producers. Fixed costs show economies of scale until farm size reaches 250 to 300 ha. Operating costs are similar for all types of seed crops, with fertilizer, herbicides and machinery costs representing up to 50% of total costs. Key words: Herbage seed production, Oregon, activated carbon, field burning, aerial inspections.