Modification of seedling growth of triticale and barley by seed-applied chlormequat

Naylor, R. E. L.; Brereton, Philip S.; Munro, L. M.

doi:10.1007/bf00024770

Cited by 6 publications

(1 citation statement)

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“…apical development rate was slowed and tillering increased in wheat (Triticum aestivum L.) and oat (Avena sativa L.) grown under long day conditions (Hutley-Bull and Schwabe 1982, Craufurd and Cartwright 1989. Chlormequat chloride (CCC) increased tiller number in barley (Hordeum vulgare L.) and triticale (X Triticosecale Wittmack), when applied as a seed treatment (Naylor et al 1989) and in winter barley when applied prior to or during tillering (Naylor et al 1986). Enhanced tillering in barley, oat and wheat was reported to follow early application of ethephon and trinexapacethyl in the greenhouse (Rajala and Peltonen-Sainio 2001).…”

Section: Introductionmentioning

confidence: 99%

Timing applications of growth regulators to alter spring cereal development at high latitudes

Rajala¹,

Peltonen‐Sainio²

2002

AFSci

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Plant growth regulators (PGRs) are commonly used in commercial farming to control lodging in cereals. PGRs have been shown to alter yield formation and plant stand structure, other than the straw length. To study their potential in Northern growing conditions PGRs and their application time impacts on plant stand structure and yield formation in tall and short statured cultivars of barley, oat, and wheat were studied in the field. Crop stands were sprayed with the gibberellin biosynthesis inhibitors CCC [chlormequat chloride CCC], Moddus [Trinexapac-ethyl TE], or with ethylene-releasing Cerone [ethephon ETH] at the recommended times or at an earlier growth stage. CCC applied at Zadoks growth scale (ZGS) 13-14 increased and ETH applied at ZGS 39-40 reduced grain yield of oat by 370 kg ha-1 and 270 kg ha-1, respectively. In wheat, CCC applied at ZGS 31-32 reduced grain yield by 480 kg ha-1. This yield reduction was associated with lower grain yield production by the main head and particularly lower single grain weight. In barley cv. Kymppi, ETH and TE treatments promoted yield formation, whereas in cv. Saana they tended to reduce yield. Early applied PGRs reduced stem height at 14 days after treatment irrespective of species or stem stature, but at maturity no constant PGR effect was noted. Excluding the stem length, PGRs did not modify plant stand structure or yield formation markedly.

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