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Yield and Agronomic Characteristics of Meadowfoam With Planting Dates and Rates¹

Information concerning the cultural practices of meadowfoam Limnmthes alba Benth.), a potential seed oil source of long chain fatty acids, is limited. The effects of date and rate of planting on seed yield and weight, oil production, date of flowering, winter survival, seed shattering, and plant erectness in meadowfoam were studied in the field in 1974 and 1975. Three plant introductions were sown in Queenstown, Maryland on four dates between 21 September and 6 November and at four planting rates (11, 17, 23, and 29 kg/ha).

Maximum seed yields resulted following early to mid October planting and from a planting rate of at least 23 kg/ha. In 1974, a year of below-average winter temperatures, seed yields ranged from 507 to 739 kg/ha at the planting rates of 11 and 29 %/ha, respectively. The winter survival of the plots also increased as the planting rate was increased. In 1975, a year of above-average winter temperatures, no differences between the planting rates for yield or winter survival were detected. Planting rates did not affect oil content or seed weight. However, planting dates caused considerable amount of variation for these characteristics. Planting rates had no effect on date of flowering, plant erectness, or seed shattering.

P.I. 374790 averaged 22 and 12% more seed yield than P.I. 283701 and P.I. 374791, respectively, but produced 5(r, lighter seed than the other entires. The heaviest seed was produced by P.I. 283701 which also had the highest oil content (270%). The correlation between oil content and seed weight was 0.67 (P=O.Ol) in 1975. Under Maryland conditions, meadowfoam should be planted in early to mid-October at a rate of 23 kgjha to obtain maximum yield and to avoid winter injury.

Key Words: Oil content • Limnanthes alba Benth

² Assistant professor (now assistant professor, Dep. of Agronomy, Georgia Exp. Stn., Experiment, GA 30212) and formerly graduate research assistant, Univ. of Maryland, College Park, Md.; research agronomist, Plant Genetics and Germplasm Institute, SEA-FR, USD.4, Beltsville, MD 20705; research leader, Northern Regional Res. Center, Peoria, IL 61601, respectively

Received for publication February 7, 1979.