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      Time of Emergence of Eight Weed Species

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      Weed Science
      Cambridge University Press (CUP)

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          Abstract

          Under irrigated field conditions at Prosser, WA, Russian thistle [ Salsola kali(L.) var. tenuifoliaTausch. ♯ 3SASKR] began to emerge by mid-March each year and usually had completed its emergence by May 1. Common lambsquarters ( Chenopodium albumL. ♯ CHEAL) was the next to appear, usually during the third or fourth week of March. Barnyardgrass [ Echinochloa crus-galli(L.) Beauv. ♯ ECHCG], redroot pigweed ( Amaranthus retroflexusL. ♯ AMARE), hairy nightshade ( Solarium sarrachoidesSendt. ♯ SOLSA), black nightshade (5. nigrumL. ♯ SOLNI), eastern black nightshade ( S. ptycanthumDun.), and cutleaf nightshade ( S. triflorumNutt. ♯ SOLTR) generally began to emerge during the first 2 weeks of April and emergence generally peaked mid-April to mid-May. Russian thistle and cutleaf nightshade had the most restricted emergence patterns, whereas seedlings of common lambsquarters, redroot pigweed, hairy nightshade, and black nightshade emerged each month from April through September. Shallow tillage at monthly intervals increased the overall emergence of common lambsquarters, redroot pigweed, black nightshade, and eastern black nightshade; decreased the emergence of barnyardgrass; and had no effect on the emergence of Russian thistle, cutleaf nightshade, or hairy nightshade.

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          Most cited references28

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          Emergence and Longevity of Seeds of Annual Weeds in Cultivated and Undistrubed Soil

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            FATE OF SEEDS OF SOME ANNUAL WEEDS IN DIFFERENT DEPTHS OF CULTIVATED AND UNDISTURBED SOIL

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              The Weed Seed Population of Arable Soil: I. Numerical Estimation of Viable Seeds and Observations on Their Natural Dormancy

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                Author and article information

                Journal
                Weed Science
                Weed sci.
                Cambridge University Press (CUP)
                0043-1745
                1550-2759
                May 1984
                June 12 2017
                May 1984
                : 32
                : 3
                : 327-335
                Article
                10.1017/S0043174500059087
                738d0a0f-f1c2-47f4-91eb-1ec48f907142
                © 1984

                https://www.cambridge.org/core/terms

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