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This article in AJ

  1. Vol. 70 No. 6, p. 1103-1104
     
    Received: June 9, 1977


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doi:10.2134/agronj1978.00021962007000060050x

Influence of Date of Harvest on Yield and Agronomic Characteristics of Meadowfoam1

  1. J. W. Johnson,
  2. M. B. Devine and
  3. G. A. White2

Abstract

Abstract

Limnanthes alba Benth. is a winter annual and a potential new oil crop. Effective harvesting techniques are necessary to improve the seed retention of Limnanthes before its acceptance as an agronomic crop. The influence of time of harvest on seed yield, seed weight, and oil content was determined. The use of paraquat, l,1′-dimethyl-4,4′-bi-pyridinium ion, as a harvest aid to hasten maturity and reduce shattering was evaluated. Seed yield, seed weight, and oil content were measured in the field on two plant introductions grown on a Matapeake silt loam (fine-loamy, mixed mesic Typic Hapludults). A 20 to 37% decrease in yield was observed when the harvest was delayed 2 weeks. Harvesting 1 week before maturity resulted in the highest yield (1,461 kg/ha). The highest oil content (26%) and seed weight were obtained by harvesting at maturity. Paraquat was unacceptable as a harvest aid because of its adverse effects on yield and oil content.

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