Texas, USA 2010 - International Herbage Seed Group

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Table xx. Herbicide treatments and efficacy on V. myuros in a winter wheat field experiment. Meansfollowed by the same letter do not significantly differ.In winter wheatAfter harvest of winter wheatRed fescue 200920072008WinterSpringDate 08.10 31.10 19.08 14.08 02.09 27.10 02.01 20.05TimingABCDETreatment% control% control% control1 Stomp +AtlantisWG- 83 a Stomp Stomp 91 ab Reglone 58 a2 Stomp AtlantisWG96 a Stomp Stomp 92 ab Reglone 55 a3 Stomp - 32 b Stomp Stomp 73 bc Reglone 34 b4 - - - Stomp Stomp 66 c Reglone 38 b5 Reglone 24 cIn spring cereals the efficacy of Stomp was only 5%. Combinations of Stomp and Atlantis WGgave 73% effect when applied in a tank mix at timing A, and similar to the winter wheatexperiment the efficacy was improved (to 87%) when Stomp was applied at timing A andAtlantis WG at timing B. The visual assessments in October reflecting the efficacy of sprayingsin the spring barley as well as after harvest of the cereal crop (A, B, C and D), showed a highefficacy (94-96%) of treatments 1 and 2 and a low efficacy (40-44%) of treatments with only oneor no Stomp application in the cereal crop (treatments 3 and 4). Reglone applied in January had alow effect on V. myuros while Kerb had a high effect. The ground cover of V. myuros in Maywas 1-2% for all treatments including Kerb but 3-11% for all treatments including Reglone.Atlantis WG is not registered for use in spring barley and caused severe crop damage by foliageyellowing and plant stunting. Growth reduction in red fescue after the C and D applications ofStomp was 3% for treatments 3 and 4 and 7-8% for treatments 1 to 4. Red fescue coverage inMay in the seed harvest year was 84-90% for all treatments that had Reglone and 31 to 43% forall treatments with Kerb in the winter.Perspectives139
The pot experiments did not revealed any new effective herbicides for control of V. myuros. Thefield experiments showed that V. myuros control is improved when Atlantis WG is included inthe weed control strategy; however, the effect was temporary, and none of the treatments wereable to provide a satisfactory control lasting until seed harvest. In conclusion, control of V.myuros requires more effort than herbicides and future experiments will include integrated weedmanagement such as timing of crop establishment, sowing depth and crop density.ReferencesMeier U. et al. (2001).http://www.jki.bund.de/fileadmin/dam_uploads/_veroeff/bbch/BBCH-Skala_englisch.pdfAcknowledgementWe wish to thank all the technicians who have been involved in the experiments for theirexcellent work. The experiments were founded by the Danish <strong>Seed</strong> Council and the Danish FoodIndustry Agency.140
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Proceedings of the 7th Internationa
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Table of ContentsORAL PRESENTATIONS
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Seed yield components and yield per
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International Herbage Seed Conferen
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16:15 - 16:30 Reliability of salini
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Hotel expense is covered for night
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40,000 were slaves (McDonald, 2007)
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Fig. 1. Texas AgriLife Research and
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$7 billion for cattle, $3 billion f
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principle and encourages both AgriL
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eceived by growers, the above perce
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seed conditioning plants are locate
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Table 4.Hectares of open-field burn
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system, a seed crop is produced fro
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Fig. 1. Land resource areas of Texa
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y land owners. Seed yields are low
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The influence of planting density o
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Simple correlation and regression a
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Variation in seed shattering in a g
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Seed retention (SR) was calculated
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mm160120Precipitation8040020Km h -1
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Young, B. A. (1986). A Source of Re
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Several methods are commonly used f
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Table 3. Effect of the length of ha
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Alfalfa seed production in semi-hum
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Rather near the meteorological stat
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ReferencesBolaños-Aguilar E.D., Hu
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ased bioenergy conversion plants wa
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Table 1. Average distances required
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Figure 1. Optimized locations for 1
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Perennial ryegrass (Lolium perenne
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Relative Seed Yieldsingle composite
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Flowers, M.D.; Hart, J.M.; Young II
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Thus, similar to tissue tests, remo
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Conclusion:Perhaps our most importa
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Modelling critical NDVI curves in p
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The five spectral reflectance measu
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Harvest loss in ryegrass seed crops
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Larger than expected harvest losses
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Rolston, P.; Trethewey, J.; McCloy,
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Optical sensors have the potential
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Figure 2. Seed yield response to ap
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Flowers, M. D., Hart, J.M., Young I
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In 2010, France has launched the fo
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Yield (% maximum)ConclusionThe resu
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Plant N uptakeN unavailableSoil nit
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Stresses associated with germinatio
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correspond to electrical conductivi
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applied later in the fall was more
Page 99 and 100: Figure 2. Establishment of five ove
Page 101 and 102: The seed vigour testing was perform
Page 103 and 104: Table 1. Germination index (GI) for
Page 105 and 106: Reliability of salinity screening L
Page 107 and 108: AcknowledgmentThis research was sup
Page 109 and 110: Table 2. Greenhouse salinity screen
Page 111 and 112: The seeds were collected from the A
Page 113 and 114: increases germination to its potent
Page 115 and 116: Light, lodging and flag leaves-what
Page 117 and 118: Relative seed yieldSeed yield (kg/h
Page 119 and 120: Hampton, J.G.; Clemence, T.G.A.; He
Page 121 and 122: The seed set is of major importance
Page 123 and 124: In grass species with poor seed ret
Page 125 and 126: support system to optimize fungicid
Page 127 and 128: weather stations in grass seed fiel
Page 129 and 130: ust resistance loci in Lolium peren
Page 131 and 132: Seed yield variation in a red clove
Page 133 and 134: 100Seed yield plant -1 (g)806040200
Page 135 and 136: Marden, J. H. 1984. Remote percepti
Page 137 and 138: Crimson clover seed production in t
Page 139 and 140: Piper, C.V. 1935. Forage plants and
Page 141 and 142: deal of investigation into the caus
Page 143 and 144: genes and subsequent ability to pro
Page 145 and 146: Gatenby, W.A., S.C. Munday-Finch, A
Page 147 and 148: Control of Vulpia myuros in red fes
Page 149: The strip design provides an opport
Page 153 and 154: CharacterWeed abundance1 A few plan
Page 155 and 156: Jensen, P. K. (2010) Longevity of s
Page 157 and 158: Effects of intraspecific competitio
Page 159 and 160: flowering, Gangi accumulated a high
Page 161 and 162: The seed yield of Gangi was, on ave
Page 163 and 164: Seed yield components and yield per
Page 165 and 166: ResultsVariation among populations
Page 167 and 168: Table 2. Means of total seeds per p
Page 169 and 170: Ryle, G. J. (1970). Partition of As
Page 171 and 172: Control of Apion trifolii in red cl
Page 173 and 174: Number of seeds /inflorescencesimil
Page 175 and 176: population. However, in spite of th
Page 177 and 178: Corvallis where they were debearded
Page 179 and 180: Table 1. Effect of Palisade growth
Page 181 and 182: Variations on potential and harvest
Page 183 and 184: Determination of optimum desiccatio
Page 185 and 186: Relative seed yield (%)Flowers/m225
Page 187 and 188: Harvesting too soon after peak flow
Page 189 and 190: Annual ryegrass seed production in
Page 191 and 192: seed yield, kg/haExtractable Al, mg
Page 193 and 194: ReferencesHaby, V.A. (1995). Soil m
Page 195 and 196: Kentucky bluegrass (Poa pratensis L
Page 197 and 198: urn residue management (Fig. 1 and
Page 199 and 200: Comparing herbicide selectivity in
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Development of new tetraploid Chlor
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Following 4 (or 5) cycles of select
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Loch, D.S., Rethman, N.F.G. & van N
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KBGcocksfootHykorLofatimothymeadowf
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Figure 2 Relative seed yield (%) se
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and GA 4 . In consequence this inac
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Table 1 The effect of trinexapac-et
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Silberstein, T.B., Young, W.C. III,
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inflorescece number and seed yield
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Germination of Lolium multiflorum g
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Effect of sowing density on seed yi
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y-products of this grass seed crop
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Table 2. Effect of PGR on seed yiel
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Further culm length measurements ga
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chlorophyllometer. Measurements wer
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Table 2. Photosynthesis rate of fla
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Organization of grass seed research
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Path Coefficient and Ridge Regressi
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through y4 (0.133). Increasing y 1
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Newell G.J., Lee B. (1981)Ridge reg
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Relative humidity, seed moisture co
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Ergovaline contents in grasses from
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11.8 % (Central East) to 40.0% (Nor
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ReferencesBony, S. & Delatour, P. (
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Long-term Evaluation of Annual Ryeg
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seed yield. All systems of establis
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Preliminary results after four year
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Casals, Marie-LaureFNAMSImpasse du
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Mao, PeishengForage Seed LabChina A
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Vanasche, DavidVanasche Farm36130 N
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Texas, USA 2010 - International Herbage Seed Group

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