Effects of Plant Growth Regulators on Tall Fescue Rooting and Water Use

1997 ◽  
Vol 2 (2) ◽  
pp. 13-27 ◽  
Author(s):  
K. B. Marcum ◽  
Hongfei Jiang
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Water Use ◽  
Growth Regulators ◽  
Tall Fescue

Grass seed yields increased with plant growth regulators and fungicides

2004 ◽  
pp. 127-132 ◽  
Author(s):  
M.P. Rolston ◽  
B.L. Mccloy ◽  
N.B. Pyke
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Seed Yield ◽  
Growth Regulators ◽  
Tall Fescue ◽  
Yield Data ◽  
Yield Increase ◽  
Seed Yields ◽  
New Generation ◽  
Gibberellic Acid Biosynthesis

Seed yields of ryegrass and tall fescue have increased rapidly over the last seven years; the best farm yields are now reaching 3000 kg/ha, up from 2000 kg/ha. These increases are largely due to the adoption of technologies developed from research funded from grower crop levies and effective technology transfer programmes. The key technologies are (1) the adoption of trinexapac ethyl (TE), a plant growth regulator that blocks gibberellic acid biosynthesis and reduces lodging; and (2) new generation triazole and strobilurin fungicides that give improved disease control and extend the period that green leaf area is maintained on crops. Seed yield data from 10 ryegrass and 6 tall fescue trials with TE, and from 13 fungicide trials are presented. The average seed yield increase in tall fescue treated with 200 g TE/ha and ryegrass with 400 g TE/ha was 67% and 50% respectively. In fungicide trials, seed yields in forage perennial ryegrass were increased by 20% and in turf ryegrass by 42%. A survey of growers indicated 95% of ryegrass growers and 100% of tall fescue growers had adopted the use of TE three years after the commercial release of the product. Keywords: fungicides, plant growth regulators, ryegrass, seed yield, strobilurin, tall fescue, triazole, trinexapac

Response of Tall Fescue (Festuca arundinacea) to Plant Growth Regulators and Mowing Frequency

1989 ◽  
Vol 3 (1) ◽  
pp. 54-59 ◽  
Author(s):  
Billy J. Johnson
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Tall Fescue ◽  
Vegetative Growth ◽  
Festuca Arundinacea ◽  
Shoot Density ◽  
Combination Treatments ◽  
Plant Injury

Mefluidide, Mon 4620, paclobutrazol plus mefluidide, and flurprimidol plus mefluidide temporarily injured and discolored tall fescue without reducing shoot density. Mefluidide at 0.43 kg ai/ha and Mon 4620 at 2.8 kg ai/ha suppressed vegetative growth of mowed grass 4 weeks while unmowed grass was suppressed for 8 weeks. Mefluidide at 0.14 kg/ha with either flurprimidol at 1.1 kg ai/ha or paclobutrazol at 1.1 kg ai/ha suppressed vegetative growth of mowed tall fescue for 5 and 6 weeks, respectively. Combination treatments also suppressed the growth of nonmowed tall fescue 8 to 10 weeks. Mowing effectively suppressed seedheads for 12 weeks when the grass was mowed at 3 and 6 weeks, while mowing only once at 4 weeks did not. Seedhead suppression was not improved with weekly mowing compared with two mowings. Mowing influenced the performance of plant growth regulators on vegetative growth and seedhead control but not plant injury, quality, or shoot density.

scholarly journals Response of Tall Fescue to Plant Growth Regulators and Mowing Frequencies

1993 ◽  
Vol 11 (4) ◽  
pp. 163-167 ◽  
Author(s):  
B. Jack Johnson
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Tall Fescue ◽  
Rapid Growth ◽  
Vegetative Growth ◽  
Growth Period ◽  
Early Spring ◽  
Acceptable Level ◽  
Turf Quality

Abstract Tall fescue (Festuca arundinace Schred.) produces rapid growth during a 6- to 8-week period in early spring. A field experiment was initiated on tall fescue to determine the number of mowings that can be eliminated by the use of plant growth regulators (PGRs) during this rapid growth period. Primo (CGA 163935) applied at 0.4 kg/ha (0.36 lb/A) mid-March suppressed vegetative growth for 3 to 5 weeks and eliminated 3 mowings during the first 5 weeks after treatment during 1990 and 1991 and eliminated 2 mowings during 1993. Primo (CGA 163935) applied at this rate did not reduce the quality and density of tall fescue below the acceptable level. Primo (CGA 163935) applied at 0.8 kg/ha (0.72 lb/A) eliminated 1 additional mowing during the 5 weeks after treatment in 2 of 3 years when compared with the 0.4 kg/ha (0.36 lb/A) rate. However, turf quality was consistently lower for 6 to 7 weeks after the tall fescue was treated with the 0.8 kg/ha (0.72 lb/A) rate. Embark (mefluidide) applied at 0.42 kg/ha (0.38 lb/A) performed similarly to Primo (CGA 163935), except the quality and density of the turf were reduced below the acceptable level at various times during the study. There was no advantage in the use of Cutless (flurprimidol) plus Embark (mefluidide) at 1.1 + 0.14 kg/ha (1.0 + 0.12 lb/A) or paclobutrazole (PP 333) plus Embark (mefluidide) at 1.1 + 0.14 kg/ha (1.0 + 0.12 lb/A) on suppressing vegetative growth of tall fescue when compared with Embark (mefluidide) at 0.42 kg/ha (0.38 lb/A) alone. Neither Limit (amidochlor) at 2.8 kg/ha (2.5 lb/A) nor paclobutrazol (PP 333) at 1.1 kg/ha (1.0 lb/A) suppressed vegetative growth as effectively as Primo (CGA 163935) or Embark (mefluidide).

scholarly journals PLANT GROWTH MODIFICATION AND WATER USE OF HIBISCUS ROSA-SINENSIS `BRILLIANT' PLANTS BY UNICONAZOLE WITH VARIOUS COMBINATIONS OF PLANT GROWTH REGULATORS.

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1125e-1125
Author(s):  
L.G. Sanabria ◽  
S.E. Newman
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Plant Growth Regulators ◽  
Water Use ◽  
Growth Regulators ◽  
Height Reduction ◽  
Hibiscus Rosa Sinensis ◽  
Diffusive Resistance ◽  
Growth Modification

Various uniconazole (Sumagic™) rates were either sprayed or drenched alone or in combination with 6-BA and GA4+7 (Promalin™) or dikegulac-sodium (Atrinal™) on Hibiscus rosa-sinensis `Brilliant'. The rates of uniconazole were 0, 5, 10, and 15 mg a.i./L; 6-BA and GA4+7, 25 mg a.i./L each; and dikegulac-sodium 1000 mg a.i./L.Plant height was reduced by uniconazole when drenched at rates as low as 5 mg/L and 15 mg/L when sprayed. Dikegulac-sodium slightly counteracted the effects of uniconazole. Uniconazole activity was increased when either sprayed or drenched with application of 6-BA and GA4+7 resulting in greater height reduction.Transpiration and stomatal diffusive resistance of plants drenched with uniconazole alone was erratic; however, when uniconazole was sprayed or drenched and mixed with 6–BA and GA4+7 or dikegulac-sodium transpiration increased.

scholarly journals Effect of Irrigation Levels and Plant Growth Regulators on Cucumber (Cucumis sativus L.) under Poly House

2021 ◽  
pp. 36-41
Author(s):  
. Anita ◽  
R. K. Narolia ◽  
S. R. Bhunia ◽  
P. K. Yadav
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Water Use ◽  
Growth Regulators ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Yield Attributes ◽  
Net Returns ◽  
Use Efficiency ◽  
Irrigation Levels

An experiment was conducted during the winter season of 2017-18 at College of agriculture, Bikaner to study the effect of irrigation levels and plant growth regulators on Cucumber under naturally ventilated Poly house condition. The experiment was laid out in split plot design with three replications. The treatments comprised of four drip irrigation levels (0.4, 0.6, 0.8 and 1.0 ETc or crop evapotranspiration) assigned to main plots and three plant growth regulators viz; water spray, NAA or Naphthalene Acetic acid (100 ppm) and GA3 (50 ppm) assigned to sub plots. The objectives of this study were to find out the effects of irrigation levels as well as plant growth regulators on yield attributes of cucumber and their interactions. Results indicated that earliness i.e. days to first flowering (35.40) and first harvest (52.00) were recorded maximum with 1.0 ETc as compared to other irrigation levels. The same treatment (1.0 ETc) significantly gave maximum fruit length (21.07 cm), number of fruits per vine (12.02), fruit weight (103.29 g), fruit yield (728.76 q ha-1) and net returns (765035.9 ha-1) with B:C ratio (2.46). However, water use efficiency (3.61 q ha-1 cm-1) was found maximum with 0.4 ETc. Among various plant growth regulators GA3 (50 ppm) recorded significantly higher yield attributes namely fruit length (21.63 cm), number of fruits per vine (12.34), fruit weight (99.48 g) and fruit yield (729.23 q ha-1). Water use efficiency, net returns and B:C ratio also exhibited higher values (2.57 q ha-1 cm-1, 765307.7ha-1 and 2.46, respectively) with same treatment. Similarly, earliness i.e. days to first flowering (34.19) and days to first harvest (50.70) were recorded with GA3. The treatment combination 0.8 ETc + GA3 (50 ppm) gave maximum value for fruit yield (793.93 q ha-1) per hectare.

Tall Fescue Sward Dynamics: II. Influence of Four Plant Growth Regulators

Crop Science ◽  
1993 ◽  
Vol 33 (2) ◽  
pp. 304 ◽  
Author(s):  
David R. Spak ◽  
Joseph M. DiPaola ◽  
William M. Lewis ◽  
Charles E. Anderson
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Tall Fescue
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