Texas, USA 2010 - International Herbage Seed Group

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Evaluation of Palisade (trinexapac-ethyl) on fifteen Kentucky bluegrassvarieties grown for seed in central OregonM.D. Butler & R.P. Affeldt, 850 NW Dogwood Lane, Madras, Oregon 97741,E-mail: marvin.butler@oregonstate.eduAbstractThe growth regulator, Palisade (trinexapac-ethyl), was evaluated on 15 Kentucky bluegrass (Poapratensis L.) varieties grown for seed at the Central Oregon Agricultural Research Center. Oneset of plots is a first-year stand and the other is a second-year stand. The influence of Palisade onseed yield, plant height, and lodging were documented. Treatments were applied at the bootstage and varieties were harvested based on maturity. Seed yields were significantly increasedfor 12 of 15 varieties in the first year field, and 4 of 15 in the second year field. Application ofPalisade uniformly reduced plant height and decreased lodging, with the exception of one datapoint.IntroductionResearch to evaluate Palisade on Kentucky bluegrass was conducted in commercial seed fieldsof „Merit‟ or „Geronimo‟ from 1999 to 2003. Yields were increased by 31 to 36 percent 4 of the5 years when Palisade was applied at 22 oz/acre from the second node (Feekes 7) to heads justbecoming visible (Feekes 10.1). Late application when the heads extended just above the flagleaf (Feekes 10.4) produced the greatest reduction in plant size, while plants tended to outgrowthe effect of earlier Palisade applications. No differences between treatments in weight per 1,000seeds were observed, and percent germination was not adversely affected.Methods and MaterialsThis research initiated in 2007 was conducted at the Central Oregon Agricultural ResearchCenter (COARC) near Madras. A split-plot design was used, with 10-ft by 60-ft main plots and 310-ft by 20-ft subplots. Subplots were randomized and included Palisade, Beacon(primisulfuron), and an untreated check in the first-year field planted to 2008, and Palisade andan untreated check in the second-year field planted during 2007. Main plots were replicated fourtimes in a randomized complete block design. Palisade was applied at 24 oz/acre on May 8, 2009when most varieties were in the boot stage.Application was made with a CO 2 -pressurized, hand-held boom sprayer at 40 psi and 20 gal/acrewater using TeeJet 8002 nozzles. Plant height was measured in the first-year field on May 22 andJune 3 and in the second-year field on May 27 and June 3. Percent lodging was estimated on July1. A section 6-ft x 17 ft of each plot was swathed as varieties matured from July 2 to 9. This wasfollowed by combining of the plots at an appropriate timing. Equipment used was a plot-sizedswather and Wintersteiger plot combine. Seed samples were transported to the Hyslop Farm near165
Corvallis where they were debearded, run through a small scale Clipper cleaner, and clean seedweight was determined.Results and Discussion1 st Year FieldSeed yield on the first year field was significantly higher for 12 of the 15 varieties treated withPalisade (Table 1). Yield across all varieties averaged 35 percent higher than the untreated check.Average yield for untreated plots across varieties was 1025 lb/acre compared with 1340 lb/acrefor those treated with Palisade, with varieties varying from a 12 to 92 percent increase. The trendwas a reduction in plant height of 2.0 inches on May 22 and 2.6 inches on June 3, with a 37percent reduction in lodging across varieties.2 nd Year FieldSeed yield on the second year field was significantly higher for 4 of the 15 varieties, with thetrend for increased yields (Table 2). The exception was the variety „Crest‟. The average yieldincrease with Palisade across varieties was 22 percent. However, seed yields on the second yearfield were down significantly from last year, with an average of 702 lb/acre for the untreatedplots compared to 822 lb/acre for those treated with Palisade. It is believed this overall reductionin yield was due to a lack of control for winter grain mite and ergot. The trend was a reduction inplant height of 3.4 inches on May 27and 4.5 inches on June 3, with a 34 percent reduction inlodging across varieties.As a first year field last year, this field produced an average yield across varieties of 1266 lb/acrefor the untreated plots and 1383 lb/acre for plots treated with Palisade. The average yieldincrease across varieties was 11 percent for Palisade treated plots. The trend was a reduction inplant height of 1.3 inches, and a 44 percent reduction in lodging across varieties.ReferencesButler, M., and C. Campbell. 2005. Effect of Residue Management and Palisade on KentuckyBluegrass Seed Production in Central Oregon, 2004. Central Oregon Agricultural ResearchCenter 2004 Annual Report. Special Report 1060. pp. 97-99.Butler, M., Orr, J. and C. Campbell. 2004. Evaluation of Palisade on Kentucky and RoughBluegrass, 2003. Central Oregon Agricultural Research Center 2003 Annual Reports,Special Report 1053. pp. 146-147.Butler, M., Orr, J., and C. Campbell. 2003. Evaluation of Palisade on Kentucky and RoughBluegrass, 2002. Central Oregon Agricultural Research Center 2002 Annual Report,Special Report 1046. pp. 170-172.166
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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
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Figure 2. Establishment of five ove
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The seed vigour testing was perform
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Table 1. Germination index (GI) for
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Reliability of salinity screening L
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AcknowledgmentThis research was sup
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Table 2. Greenhouse salinity screen
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The seeds were collected from the A
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increases germination to its potent
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Light, lodging and flag leaves-what
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Relative seed yieldSeed yield (kg/h
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Hampton, J.G.; Clemence, T.G.A.; He
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The seed set is of major importance
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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 and 150: The strip design provides an opport
Page 151 and 152: The pot experiments did not reveale
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: population. However, in spite of th
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
Page 201 and 202: Development of new tetraploid Chlor
Page 203 and 204: Following 4 (or 5) cycles of select
Page 205 and 206: Loch, D.S., Rethman, N.F.G. & van N
Page 207 and 208: KBGcocksfootHykorLofatimothymeadowf
Page 209 and 210: Figure 2 Relative seed yield (%) se
Page 211 and 212: and GA 4 . In consequence this inac
Page 213 and 214: Table 1 The effect of trinexapac-et
Page 215 and 216: Silberstein, T.B., Young, W.C. III,
Page 217 and 218: inflorescece number and seed yield
Page 219 and 220: Germination of Lolium multiflorum g
Page 221 and 222: Effect of sowing density on seed yi
Page 223 and 224: y-products of this grass seed crop
Page 225 and 226: 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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