e-journal

High Seed Retention at Maturity of Annual Weeds Infesting Crop Fields Highlights the Potential for Harvest Weed Seed Control

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Seed production of annual weeds persisting through cropping phases replenishes/establishes viable seed
banks from which these weeds will continue to interfere with crop production. Harvest weed seed
control (HWSC) systems are now viewed as an effective means of interrupting this process by targeting
mature weed seed, preventing seed bank inputs. However, the efficacy of these systems is directly related
to the proportion of total seed production that the targeted weed species retains (seed retention) at crop
maturity. This study determined the seed retention of the four dominant annual weeds of Australian
cropping systems - annual ryegrass, wild radish, brome grass, and wild oat. Beginning at the first
opportunity for wheat harvest and on a weekly basis for 28 d afterwards the proportion of total seed
production retained above a 15 cm harvest cutting height was determined for these weed species present
in wheat crops at nine locations across the Western Australian (WA) wheat-belt. Very high proportions
of total seed production were retained at wheat crop maturity for annual ryegrass (85%), wild radish
(99%), brome grass (77%), and wild oat (84%). Importantly, seed retention remained high for annual
ryegrass and wild radish throughout the 28 d harvest period. At the end of this period, 63 and 79% of
total seed production for annual ryegrass and wild radish respectively, was retained above harvest
cutting height. However, seed retention for brome grass (41%) and wild oat (39%) was substantially
lower after 28 d. High seed retention at crop maturity, as identified here, clearly indicates the potential
for HWSC systems to reduce seed bank replenishment and diminish subsequent crop interference by
the four most problematic species of Australian crops.

Nomenclature: Annual ryegrass, Lolium rigidum Gaud. LOLKRI; wild radish, Raphanus raphanistrum L. RAPRA; wild oat, Avena fatua L. AVEFA; Brome grass, Bromus spp. Roth, BRODI; wheat, Triticum aestivum L.

Keywords: Weed seed retention, herbicide resistance, seed bank

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Ketersediaan

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Informasi Detail

Judul Seri

Weed Technology

No. Panggil

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Penerbit

New York : Weed Science Society America., 2014

Deskripsi Fisik

Weed Technology 2014 28:486–493

Bahasa

English

ISBN/ISSN

DOI: 10.1614/WT-D-13

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

28, July–September 2014

Subjek

PERTANIAN.
ILMU GULMA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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