Effects of plant growth regulator mepiquat chloride on content of active compounds in Scutellaria baicalensis

2012 ◽  
Author(s):  
HU Guo-qiang
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Scutellaria Baicalensis ◽  
Active Compounds ◽  
Mepiquat Chloride

Effect of Bensulfuron-Methyl on Cotton (Gossypium hirsutumL.) Growth and Development

1996 ◽  
Vol 10 (4) ◽  
pp. 851-855
Author(s):  
C. Dale Monks ◽  
Michael G. Patterson ◽  
Malcolm Pegues
Keyword(s):  
Methyl Ester ◽  
Plant Growth ◽  
Plant Height ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Growth And Development ◽  
Field Experiments ◽  
Mepiquat Chloride ◽  
Boll Rot ◽  
Effect On Yield

Field experiments were conducted in Alabama from 1992 through 1994 to evaluate the potential of the methyl ester of bensulfuron applied at sublethal rates as a plant growth regulator for reducing plant height and boll rot in cotton. Bensulfuron at 0.017 and 0.034 g ai/ha or mepiquat chloride at 10 g ai/ha was applied POST alone at the pinhead square or early-bloom stage of cotton growth or sequentially at 0.017 followed by (fb) 0.017 g/ha, 0.034 fb 0.034 g/ha of bensulfuron and 5 fb 5, 10 fb 10, 10 fb 20, or 20 fb 20 g/ha of mepiquat chloride. Mepiquat chloride had no effect on yield in 1992 and 1994 but decreased yield when applied sequentially in 1993. Bensulfuron was generally detrimental to first position fruit retention, and it delayed maturity. Treatments that reduced plant height did not reduce boll rot. Bensulfuron treatments that reduced plant height also reduced yield; therefore, the potential for its use as a growth regulator in cotton appears limited.

scholarly journals Rainfall intensity and Mepiquat Chloride persistence in cotton

2007 ◽  
Vol 64 (2) ◽  
pp. 125-130 ◽  
Author(s):  
Fábio Suano de Souza ◽  
Ciro Antonio Rosolem
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Dry Matter ◽  
Rainfall Intensity ◽  
Mepiquat Chloride ◽  
Reproductive Structures ◽  
Cotton Plants ◽  
Dry Matter Weight

In some regions where cotton is grown in Brazil rainfall amounts to about 2,000 mm per year, which imposes a great risk for Mepiquat Chloride (MP) to be washed from cotton leaves before being absorbed. The objective of this research was to evaluate the MC persistence when applied on cotton plants submitted to different rain intensities after spraying. The treatments were three MC rates: 0, 15.0 and 30.0 g a.i. ha-1 and four simulated rainfalls, applied 90 minutes after MC spraying: 5, 10, 20 and 40 mm, plus a treatment without rain. Cotton plants of the cv. Delta Opal were grown in 12 L pots filled with an Haplortox. The experimental design was consisted of complete randomized blocks, in a factorial scheme, with four replicates. The evaluated parameters were: plant height, number of reproductive branches, dry matter weight, reproductive structures, retention and leaf area. The higher the rainfall the lower the effectiveness of the plant growth regulator in controlling plant height. A simulated rainfall as low as 5 mm occurring 90 minutes after MC application was enough to wash some of the plant growth regulator from cotton leaves.

scholarly journals Hormesis Effect of Dichlorophenoxy Acetic Acid Sub-Doses and Mepiquat Chloride on Cotton Plant

2017 ◽  
Vol 35 (0) ◽  
Author(s):  
G.H.P. AMÉRICO ◽  
J.H.P. AMÉRICO-PINHEIRO ◽  
E. FURLANI JR
Keyword(s):  
Acetic Acid ◽  
Experimental Design ◽  
Plant Growth ◽  
Plant Development ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Seed Cotton ◽  
Mepiquat Chloride ◽  
Hormesis Effect ◽  
Dichlorophenoxy Acetic Acid

ABSTRACT: The aim of this study was to evaluate the hormesis effect of sub-doses of dichlorophenoxy acetic acid herbicide and the plant growth regulator mepiquat chloride on the vegetative and productive characteristics of two cotton cultivars (FMT 701 and Fibermax 966). The experiment was conducted from November 2013 to May 2014. The experimental design was a randomized block in a factorial scheme 6 x 2 x 2, with four replications, totaling 96 installments with 24 treatments: the witness and five sub-doses of the herbicide 2,4-D: 0.68, 1.36, 2.04, 2.72 and 3.40 g equivalent acid (e.a) per ha, with and without application of mepiquat chloride at a dose of 200 mL ha-1 in the cotton cultivars FMT 701 and Fibermax 966. The sub-doses applied were 2,4-D at 45 days after the emergence of the plant (DAE), and the growth regulator was applied at 70 DAE. It was found that the use of the growth regulator (mepiquat chloride) at a dose of 200 mL ha-1 was effective in controlling plant development relative to its variable height. The application of sub-doses of 2,4-D up to 1.75 g e.a ha-1 provides increased seed cotton productivity FMT 701 and Fibermax 966). The cultivar FMT 701 got greater plant height, stem diameter, number of reproductive branches, bolls per plant and seed cotton productivity compared to the cultivar Fibermax 966.

Effects of the Plant Growth Regulator Mepiquat Chloride on Silverleaf Whitefly (Homoptera: Aleyrodidae) Infestations on Cotton2

1996 ◽  
Vol 31 (1) ◽  
pp. 112-122
Author(s):  
Hollis M. Flint ◽  
Joseph E. Leggett ◽  
LeAnne Elhoff ◽  
Nancy J. Parks ◽  
Elizabeth W. Davidson
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Plant Morphology ◽  
Leaf Water ◽  
Silverleaf Whitefly ◽  
Field Plot ◽  
Mepiquat Chloride ◽  
Water Potentials ◽  
And Control

Cotton, Gossypium hirsutum L., plants were treated with the plant growth regulator mepiquat chloride (Pix™) in greenhouse and field plot tests to determine its effect on infestations of the silverleaf whitefly, Bemisia argentifolii Bellows and Perring. In the greenhouse, Pix-treated plants were significantly shorter and had thicker leaves than untreated plants by the end of the second week following application. Most of the Pix treatments caused significant reductions in adults, eggs and nymphs on leaves by fourth and final week of the test. In a separate test, leaf water potentials were equal for Pix-treated and well-watered plants which were significantly lower than for water-stressed and control plants. Pix-treated plants in two field plot tests showed the same changes in plant morphology observed in Pix-treated plants in the greenhouse. However, leaf water potentials were the same as in untreated plants and no reductions in whitefly infestations were found during the 6 to 7 wk test periods. Pix-treated plants in a third field plot test showed no changes in plant morphology or in whitefly infestations. The reduced whitefly infestations of Pix-treated plants in the greenhouse, but not in field plots, may have been due to reduced leaf water potentials in Pix-treated greenhouse plants but not in field plants.

scholarly journals Plant growth regulator losses in cotton as affected by adjuvants and rain

2012 ◽  
Vol 42 (12) ◽  
pp. 2138-2144 ◽  
Author(s):  
Fábio Rafael Echer ◽  
Ciro Antonio Rosolem
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Annual Rainfall ◽  
Growth Reduction ◽  
Chlormequat Chloride ◽  
Mepiquat Chloride ◽  
Silicon Based

Most of Brazilian cotton is produced in regions where annual rainfall exceeds 1,500mm, hence plant growth regulators (PGR) may be washed from the leaves before being absorbed. The objective of this research was to evaluate mepiquat chloride and chlormequat chloride washing from cotton leaves by rains occurring at different moments post spraying. The experiment was conducted in a greenhouse. Both PGR were sprayed to cotton at pin-head square at 15g ha-1 a.i. with and without a silicon-based adjuvant, and simulated rains were applied at 0, 0.75, 1.5, 3.0, 6.0, 12.0 and 24 hours after spraying, plus a control without rainfall. Addition of silicon adjuvant increased PGR uptake. Rainfall occurring up to 24 hours after spraying resulted in some PGR loss from cotton leaves, mainly in the absence of the adjuvant. The decreased uptake implies that in order to achieve the desired level of growth reduction, at least a fraction of the original PGR rate should be reapplied.

scholarly journals Plant growth regulation: a method for fine-tuning mepiquat chloride rates in cotton1

2017 ◽  
Vol 47 (3) ◽  
pp. 286-295 ◽  
Author(s):  
Fábio Rafael Echer ◽  
Ciro Antonio Rosolem
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Management Practices ◽  
Fiber Quality ◽  
Fine Tuning ◽  
New Method ◽  
Average Weight ◽  
Early Maturity ◽  
Mepiquat Chloride

ABSTRACT Plant growth regulator management has been a challenge for cotton growers, due to the increased weather instability and the adoption of early cultivars, in off-season crops. This study aimed at proposing a new method, called Crop Growth Rate, to define mepiquat chloride rates in cotton crops, as well as to compare it with traditional management practices. Except for micronaire, there was no difference in cotton growth parameters, neither in yield nor fiber quality, between the new method and the traditional one. The mepiquat chloride rates were, on average, 24 % higher and 43 % lower in late and early maturity cultivars, respectively, for the new method. The number of bolls in plants treated with mepiquat chloride was lower than in non-treated plants, for the IMA5672B2RF and IMA5675B2RF cultivars, but a higher average weight of bolls was observed for these genotypes. The new method is efficient in defining the plant growth regulator rate to avoid an excessive growth and results in less mepiquat chloride applied to early cycle cultivars, preserving lint yield and fiber quality.

Influence of plant growth regulator and rhizobial inoculation on nodulation and soybean nitrogen contant

2007 ◽  
Vol 35 (2) ◽  
pp. 993-996 ◽  
Author(s):  
Sulejman Redžepović ◽  
Sanja Sikora ◽  
Josip Čolo ◽  
Mihaela Blažinkov ◽  
Marija Pecina
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Rhizobial Inoculation
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