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

Echer, Fábio Rafael; Rosolem, Ciro Antônio

doi:10.1590/s0103-84782012005000120

Cited by 8 publications

(5 citation statements)

References 9 publications

(10 reference statements)

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“…The use of a growth regulator to reduce plant size provides a greater balance between reproductive and vegetative parts, which favors reduced competition for photoassimilates between vegetative and reproductive growth (Lamas and Ferreira, 2015). Furthermore, it promotes higher fruit retention in the first positions, a fact that culminates in higher yield (Echer and Rosolem, 2012). The cultivar FM 975 produced the largest amount of cotton boll relative to that of the other cultivars (Table 7), although it was the genotype that presented the highest severity of leaf spot (Table 4).…”

Section: Resultsmentioning

confidence: 99%

Cultivar, Plant Height and Fungicide for Integrated Control of Ramularia Spot and Increased Cotton Yield

Souza

Dias²,

Theodoro

et al. 2020

JAS

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Cotton is a crop with a high economic value, usually sprayed with large amounts of pesticides to control pests and diseases. Ramularia spot is a foliar disease that cause early defoliation and can compromise cotton yield; however, there is a need of information about the interaction of cultivars and plant height as a tool to improve ramularia control and increase yield. The objective of this study was to evaluate the effects of the interaction between plant height, cultivar, and fungicides applied to the severity of the leaf spot and cotton yield. The experiment was carried on during the 2014/15 crop season in Chapadão do Sul, MS, Brazil. A randomized complete block design in a 2 × 3 × 3 factorial scheme was used, where the factors were plant heights (1 and 1.5 m), cultivar (FMT 701, FM 975, and FM 944) and type of fungicide (Negative control , FT1, and FT2). The fungicidal treatments consisted of sequential sprays of different fungicides, including the triazole, strobilurin, and carboxamide groups, recommended to farmers. The cultivar FM 975 showed greater ramularia spot progress curve when grown at 1 m height and without fungicide spray. The fungicides were efficient in reducing the severity of the ramularia spot and their use in shorter plants (1 m) increased yield. The cultivar FM 975 had the highest total yield.

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Section: Resultsmentioning

confidence: 99%

Cultivar, Plant Height and Fungicide for Integrated Control of Ramularia Spot and Increased Cotton Yield

Souza

Dias²,

Theodoro

et al. 2020

JAS

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“…In addition, higher PGR rates were applied for the CGR method, if compared with the traditional recommendation, most likely due to the amount applied in the fourth application (86 DAE) (Table 3), when PGR rates were almost double the traditional management approach. The possibility of PGR losses due to rainfall occurring after application does exist (Echer & Rosolem 2012) and it could be a disadvantage of this method, once the PGR rate increases as plants grow higher. Johnson & Pettigrew (2006) also observed no interaction between PGR management and cotton cultivars on plant height, as reported in our experiment (2012/2013).…”

Section: Resultsmentioning

confidence: 99%

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

Echer

Rosolem

2017

Pesqui. Agropecu. Trop.

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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.

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“…Moreover, the balance between biomass production and harvest index negatively affected especially in excessive irrigation and nitrogen fertilizer use (Mondino et al, 1999). Plant growth regulators (PGR) are applied to eliminate negative effects and manipulate cotton plant architecture (Echer and Rosolem, 2012) and improve lint yield and fiber quality (Zhao and Oosterhuis, 2000). The plant growth regulators such as mepiquat chloride (MC) and chlormequat chloride (CCC) extensively used to control the overgrowth of the plant in cotton production areas of Turkey.…”

Section: Introductionmentioning

confidence: 99%

Pamuğun (Gossypium hirsutum l.) Erken Uygulanan Chlormequat Chloride’e Tepkisi

Çınar

Ünay

2021

Adnan Menderes Üniversitesi Ziraat Fakültesi Dergisi

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Plant growth regulators such as mepiquat chloride (MC) and chlormequat chloride (CCC) are used to establish the balance between the vegetative and generative growth in cotton. This study was conducted to compare the different doses and application time of CCC with MC and un-treatment (control). The seven treatments including control (non-treatment), T1 (three sprays of chlormequat chloride), T2 (two sprays of mepiquat chloride), T3 (0.4 L ha -1 CCC), T4 (0.5 L ha -1 CCC), T5 (0.6 L ha -1 CCC) and T6 (0.7 L ha -1 CCC) were laid out in Randomized Complete Block Design with four replications. The differences among treatments were found to be significant for seed cotton yield (SCY), the number of bolls per plant (N/B), boll weight (BW), plant height (PH), earliness, ginning out-turn (GOT), fiber fineness (FF), specific seed weight (SWt/S), the number seeds per boll (S/B), single seed volume (V/S) and lint yield per boll (LY/B). Finally, a single application of CCC @ 0.7 L ha -1 at the stage of DAS 90-110 days recorded optimum yield, earliness and fiber characteristics. The effects of early CCC on seed were more important than fiber characteristics.

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

Abstract: Most of Brazilian cotton is produced in regions 0, 0.75, 1.5, 3.0, 6.0, 12.0 0, 0,75; 1,5; 3,0; 6,0; 12,0

Cited by 8 publications

References 9 publications

Cultivar, Plant Height and Fungicide for Integrated Control of Ramularia Spot and Increased Cotton Yield

Cultivar, Plant Height and Fungicide for Integrated Control of Ramularia Spot and Increased Cotton Yield

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

Pamuğun (Gossypium hirsutum l.) Erken Uygulanan Chlormequat Chloride’e Tepkisi

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