The responses of virus-free and virus-infected lily ‘Enchantment’ to the retardants ancymidol, chlormequat chloride, mepiquat chloride and BTS 44 584, a ternary sulphonium carbamate

1982 ◽  
Vol 17 (1) ◽  
pp. 61-70 ◽  
Author(s):  
Roger Menhenett ◽  
Gordon R. Hanks
Keyword(s):  
Chlormequat Chloride ◽  
Mepiquat Chloride

Protecting Cotton (Gossypium hirsutum) from Fluometuron Injury with Seed Protectants

Weed Science ◽  
1991 ◽  
Vol 39 (3) ◽  
pp. 408-411 ◽  
Author(s):  
Billy R. Corbin ◽  
Robert E. Frans
Keyword(s):  
Growth Regulators ◽  
Field Experiments ◽  
Clay Soil ◽  
Yield Reduction ◽  
Silty Clay ◽  
Silt Loam ◽  
Chlormequat Chloride ◽  
Mepiquat Chloride ◽  
Loam Soil ◽  
Silty Clay Soil

Field experiments were conducted in 1986 and 1987 to evaluate the potential of growth regulators mepiquat chloride and chlormequat chloride as seed treatments to protect cotton from fluometuron injury. Fluometuron at two and three times the recommended use rate reduced cotton stand and height on Taloka and Convent silt loam soils both years. Cotton grown on a Sharkey silty clay soil was not injured by fluometuron. Mepiquat chloride and chlormequat chloride increased cotton stands on a Taloka silt loam soil when averaged over rates and years. In general, fluometuron injury to cotton was not reduced by treating seed with 1000 ppmw concentrations of chlormequat chloride or mepiquat chloride. Chlormequat chloride reduced chlorosis and necrosis of cotton treated with fluometuron, but neither growth regulator eliminated cotton injury or yield reduction caused by fluometuron at two or three times the recommended rates.

scholarly journals Nipping - A Simple Strategy to Boost The Yield - Review

2020 ◽  
pp. 45-51
Author(s):  
S. Sanbagavalli ◽  
Jangam Bhavana ◽  
S. Pavithra
Keyword(s):  
Apical Dominance ◽  
Maleic Hydrazide ◽  
Vital Role ◽  
Growth And Yield ◽  
Growth Retardants ◽  
Chlormequat Chloride ◽  
Mepiquat Chloride ◽  
Simple Strategy ◽  
Lateral Branches ◽  
Source And Sink

Nipping is an important practice that removes the apical dominance and promotes the lateral branches which in turn improves the yield of crops. It plays a vital role for better maintenance of source and sink relationship and for ameliorating the productivity. Nipping can be done in two ways either by clipping manually or by spraying growth retardants such as mepiquat chloride, chlormequat chloride and maleic hydrazide. In this review, the influence of nipping on the growth and yield of various crops has been discussed.

scholarly journals Growth regulator losses from cotton plants due to rainfall

2010 ◽  
Vol 67 (2) ◽  
pp. 158-163 ◽  
Author(s):  
Rodrigo Arroyo Garcia ◽  
Mariana Zampar Toledo ◽  
Ciro Antonio Rosolem
Keyword(s):  
Growth Rate ◽  
Plant Growth ◽  
Growth Regulators ◽  
Dry Matter ◽  
Seedling Emergence ◽  
Gossypium Hirsutum L ◽  
Chlormequat Chloride ◽  
Mepiquat Chloride ◽  
Cotton Plants ◽  
Product Loss

Plant growth regulators (PGRs) applied to cotton plants (Gossypium hirsutum L.) can be washed off by rainfall. It is expected that the closer the rainfall to spraying time, the higher the product loss and the higher the amount of product to be reapplied to reach the desired growth rate. The objective of this study was to evaluate the effects of time between rainfall and application of either mepiquat chloride or chlormequat chloride to cotton on plant growth, as well as, estimate the need for PGR reapplication. Cotton was grown in 12-L pots with soil in a greenhouse. PGRs were applied forty days after seedling emergence, when 50% of plants had one pinhead square. Rainfall was simulated 1, 2, 4, 6, or 24 h after spraying. Plant height was measured just before PGR application and then at 3-d intervals for 30 d. At harvest, the number of reproductive branches and structures were counted before dry matter phytomass determination. Both growth regulators reduced cotton dry matter yields regardless of rainfall interval. PGRs controlled excessive plant growth; however, their efficiency was reduced as the time elapsed until rainfall was shorter. Product losses were detected after all rainfall intervals, which, in field conditions would require PGR reapplication. Mepiquat chloride rates to be reapplied after rain were on average 17% higher than chlormequat chloride rates.

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 Leaf Area Response of Lantana camara L. subsp. camara to Plant Growth Regulators under Different Photosynthetic Flux Conditions

HortScience ◽  
2004 ◽  
Vol 39 (5) ◽  
pp. 1042-1044 ◽  
Author(s):  
Aristidis S. Matsoukis ◽  
Ioannis Tsiros ◽  
Athanasios Kamoutsis
Keyword(s):  
Plant Growth ◽  
Leaf Area ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Lantana Camara ◽  
Light Transmittance ◽  
Photon Flux ◽  
Trimethylammonium Chloride ◽  
Chlormequat Chloride ◽  
Mepiquat Chloride

The effect of various plant growth regulators on leaf area development of Lantana camara L. subsp. camara was investigated under three photosynthetic photon flux (PPF) conditions (100%, 72%, and 34% light transmittance). The triazole compounds paclobutrazol (0, 50, 100, 200, and 500 mg·L-1) and triapenthenol (175, 350, 700, and 1400 mg·L-1), as well as the onium-type compounds mepiquat chloride (125, 250, 500, and 1000 mg·L-1) and chlormequat chloride (750, 1500, 3000, and 6000 mg·L-1), were applied as foliar spray solutions in each PPF level after pinching the plants. Leaf area, in general, decreased logarithmically as the concentrations of paclobutrazol and triapenthenol increased at all PPF levels. On the other hand, PPF reduction was found to increase leaf area of lantana plants treated with all concentrations of each regulator. Leaf area reduction of the paclobutrazol and triapenthenol treated plants at all PPF levels exceeded 60% compared with that of nontreated plants. However, the corresponding reduction was 22%, up to 51% for the plants treated with mepiquat chloride and chlormequat chloride. These results indicate that the triazole compounds have a greater effect on the reduction of lantana leaf area than the onium-type compounds. Chemical names used: (2RS, 3RS)-1-(4-chlorophenyl)-4, 4-dimethyl-2-(1H-1, 2, 4-triazol-1-yl) pentan-3-ol (paclobutrazol); (E)-(RS)-1-cyclohexyl-4,4-dimethyl-2-(1H-1, 2, 4-triazol-1-yl) pent-1-en-1-ol (triapenthenol); 1,1-dimethyl-piperidinium chloride (mepiquat chloride); (2-chloroethyl) trimethylammonium chloride (chlormequat chloride).

THE INFLUENCE OF ANTIGIBBERELIN PREPARATIONS ON THE ANATOMICAL AND MORPHOLOGICAL INDICATORS OF SOYBEAN PLANTS

2020 ◽  
Vol 2 ◽  
pp. 26-31
Author(s):  
O. A. Shevchuk
Keyword(s):  
Plant Growth ◽  
Surface Area ◽  
Mechanism Of Action ◽  
Leaf Surface ◽  
Growth Inhibitors ◽  
Main Root ◽  
Chlormequat Chloride ◽  
Leaf Surface Area ◽  
Soybean Plants ◽  
Plant Growth Inhibitors

The specificity of the action of antigibberelin drugs is that they can influence the processes and intensity that cannot be corrected by agronomic measures of cultivation. The purpose of the work was to scientifically substantiate the use of plant growth inhibitors with an antigibberelin type of action as an element of soybean cultivation technology, to identify their effect on growth, development and productivity. The research was carried out on a soybean plants of the Triada variety. At a height of shoots 10-15 cm plants were treated with aqueous solutions: 0.5% tebuconazole, 0.2% ethephon and 0.5% chlormequat chloride until complete wetting of the leaves. Control plants were treated with water. During the research, morphological parameters, leaf surface area, and organ mass were defined. It was established that the use of plant growth inhibitors with an antigibberelinic mechanism of action (the ethylene producer esfone (0,2 %), the triazole-derived retardant tebuconazole (0,5 %) and the onium preparation chlormequat chloride (0,5 %) on soybean plants led to morphological and anatomical changes: decreasing of the mass of leaves and stem, increasing the thickness of the stem and root collar. The preparations reduced the length of internodes of soybean plants,, that created the preconditions for plant resistance to lodging. Plant growth inhibitors had different effects on the leaf surface area of soybean plants: there was an increase in this indicator by 24% for the use of chlormequat chloride, and processing with esfon and tebuconazole led to a decrease of 26% and 23% accordingly. Different effects of retardants were found on the length of the main root. Under the action of esfon the length of the main root decreased by 20%; the application of both chlormequatchloride and tebuconazole, this indication increased accordingly by 43% and 37%. The question of studying the influence of modern plant growth regulators with a different mechanism of action on the productivity of different varieties of legumes remains relevant

Source-sink optimization and morpho-physiological response of soybean [Glycine max] to detopping and mepiquat chloride application

2018 ◽  
Author(s):  
Manpreet Jaidka ◽  
J.S. Deol ◽  
Ramanjit Kaur ◽  
R. Sikka
Keyword(s):  
Seed Yield ◽  
Seed Weight ◽  
Dry Matter ◽  
Dry Matter Accumulation ◽  
Mepiquat Chloride ◽  
Area Index ◽  
Stover Yield ◽  
Source Sink ◽  
Pod Length ◽  
100 Seed Weight

Effect of detopping and mepiquat chloride on morphological, physiological and yield attributes of soybean cultivar ‘SL 544’ was studied. A two year investigation was conducted at Punjab Agricultural University, Ludhiana, during kharif seasons of 2014 and 2015. The experiment was laid-out in randomized complete block design (RCBD) with eight treatments viz. control, detopping (removal of 4-5 cm apical portion of main stem) at 50-55 days after sowing (DAS), mepiquat chloride @ 200 ppm (50-55 DAS), mepiquat chloride @ 200 ppm (50-55 + 65-70 DAS), mepiquat chloride 250 ppm (50-55 DAS), mepiquat chloride @ 250 ppm (50-55 + 65-70 DAS), mepiquat chloride @ 300 ppm (50-55 DAS) and mepiquat chloride @ 300 ppm (50-55 + 65-70 DAS) with four replications. Detopping had a non-significant effect on leaf area index, SPAD value, PAR interception, abscission of reproductive parts, seeds per pod, 100-seed weight, pod length and stover yield of soybean. It significantly decreased plant height, increased total dry matter accumulation/plant, number of flowers and pods/plant, pod setting percentage and seed yield over control during 2014 and 2015. At crop harvest, detopping developed optimized source-sink relationship by means of distribution of total dry matter between stem, foliage and pods by 20.4, 14.9 and 64.6 % during 2014 while 22.6, 20.1 and 57.4 % during 2015, respectively. Mepiquat chloride posed a non-significant effect on plant height, PAR interception, number of flowers/plant, number of seeds/pod, pod length and stover yield of soybean but it significantly decreased leaf area index, abscission of reproductive parts while increased the dry matter accumulation/plant, number of pods/plant, 100-seed weight and seed yield relative to control. At harvest, two foliar applications of mepiquat chloride @ 250 ppm resulted in optimized source-sink relationship by the distribution of total dry matter among stem, foliage and pods by 20.6, 10.9 and 68.5 % during 2014 while 19.5, 7.6 and 72.9 % during 2015, respectively. Occurrence of more rainfall during 2015 as compared to 2014 caused mepiquat chloride to hike seed yield as compared to detopping which is clearly witnessed by increase in pod dry weight per plant during 2015 than 2014. Conclusively, both detopping and mepiquat chloride resulted in enhancement in source-sink relationship and seed yield of soybean.

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