Post application Environment Controls Growth Responses in Cotton
By Muhammad Naveed Arshad on Apr 26, 2019

WCRC WCRC2

ABSTRACT RyzUp is a gibberellic acid-based plant growth promoter for cotton. The objective of this study was to determine whether growth responses of cotton to RyzUp application depend on post-treatment environmental conditions defined by temperature and potential evapotranspiration. The experiments were conducted at the Texas A&M University A...

Utilization of Spectral Imaging to Detect N and K Sufficiency in Cotton
By Muhammad Naveed Arshad on Apr 25, 2019

WCRC WCRC2

ABSTRACT Nitrogen and K as well as other plant nutrients influence the spectral properties of individual crop leaves and plant canopies. Technology is currently available that can measure reflectance at spectral resolutions of less than 2 nm. Thus, the identification of specific changes in spectral reflectance relative to plant nutrient concentrat...

Spectral Data Analysis for Cotton Growth Monitoring
By Muhammad Naveed Arshad on Apr 25, 2019

WCRC WCRC2

ABSTRACT Since information technology was introduced in agriculture, there has been a great deal of interest in estimating terrestrial biophysical parameters such as vegetation with remotely sensed data. The empirical study presented in this paper focuses on the relationships between vegetation properties and reflectance measured on a cotton canop...

Cotton Phenology and Growth Processes: Model Development
By Muhammad Naveed Arshad on Apr 25, 2019

WCRC WCRC2

ABSTRACT In cotton, phenology and leaf area development are major determinants of final yield, and are substantially affected by temperature when other conditions are optimum. Here the rate functions for various phenological events and leaf area development are presented, providing appropriate information how to develop physiologically-based subro...

COTONS, A Cotton Simulation Model for the Next Century
By Muhammad Naveed Arshad on Apr 25, 2019

WCRC WCRC2

ABSTRACT Traditional plant architectural models or ‘visualization models’ propose to visually create realistic three-dimensional plants. The visualization is based on field sampling and the application of an algorithm to standardize the three-dimensional description of a plant. “L-systems” and the “Reference Axis” are two such approaches. Mechanis...

Modeling Light-Interception for a Cotton Population Model
By Muhammad Naveed Arshad on Apr 25, 2019

WCRC WCRC2

ABSTRACT Light-interception by crops has been intensively studied since the early 1960s. Simple models of light interception for single plant, crop-rows, and for continuous canopy have been developed. More complex models, using crop geometry, have also been investigated and some of the studies tried to model plant competition. However, the majorit...

Validation and Application of GOSSYM
By Muhammad Naveed Arshad on Apr 25, 2019

WCRC WCRC2

ABSTRACT A field experiment was conducted at Alcalá del Rio (Seville, Spain) on a sandy loam soil in 1994. Three cotton cultivars (Maria del Mar, Deltapine 90 and Deltapine 20) were studied. The statistical model had four splits in the following order: irrigation, density, fertilization and genotypes. Plant height evolution, main stem node number...

Evaluation of GOSSYM – a Cotton Crop Simulation Model – Under the Soil, Climatic and Cultural Conditions in Greece
By Muhammad Naveed Arshad on Apr 25, 2019

WCRC WCRC2

ABSTRACT In a research study in Greece, funded by EU, a dynamic cotton growth simulation model, GOSSYM, was evaluated under local soil, climatic and cultural conditions. Field experiments were conducted for three years in three locations, representative of major cotton growing areas of Greece, using four cotton cultivars under two irrigation level...

Effects of NaCl stress on the biochemical substances in Bt cotton as well as on the growth and development and adult oviposition selectivity of Helicoverpa armigera
By Fan Qin on Apr 22, 2019

Crop Protection Agronomy & physiology Biomol - Biotechnology JCR

Background Recently, due to the development of food security strategies, cotton has been planted in inland saline-alkali dry soils or in coastal some saline-alkali soils in China. Under the condition, to comprehensively prevent and control Helicoverpa armigera in cotton fields with saline-alkali soils, it is important to study the larval growth an...

Twenty-Five Years after Beasley and Ting: Revealing Fundamental Properties of Fiber-Growth with Cotton Ovule Cultures
By Muhammad Naveed Arshad on Apr 19, 2019

WCRC WCRC2

ABSTRACT Since the initial description of culture conditions for growing fiber in vitro by Beasley and Ting in 1973 many laboratories, including the Cotton Fiber Bioscience Research Unit, have used cotton ovule cultures to answer questions about fiber development. Fiber growth on developmental mutants cultured in vitro was similar to patterns seen...

ASSET as an In-Furrow Application to Enhance Early-Season Growth and Lint Yield
By Muhammad Naveed Arshad on Apr 19, 2019

WCRC WCRC2

ABSTRACT The establishment of a uniform and vigorous stand is essential for producing a high yielding cotton (Gossypium hirsutum L.) crop. Germination, emergence and seedling establishment are adversely affected by unfavourable environmental conditions often experienced in the Mississippi Delta Region of the USA. Preplant in-furrow applications of...

Sucrosyl Oligosaccharide Metabolism and Cotton Fiber Development
By Muhammad Naveed Arshad on Apr 19, 2019

WCRC WCRC2

ABSTRACT The object of this study was to determine which oligosaccharides correlate with cell wall synthesis in developing cotton fibers. This study employed bolls taken from sequential fruiting branches on the same plant to rule out environmental and plant to plant differences. Cold aqueous extracts of developing cotton fibers have been analyzed...

Cell Wall Subunits, “Glue” Matrix and Cotton Fiber Development
By Muhammad Naveed Arshad on Apr 19, 2019

WCRC WCRC2

ABSTRACT The object of this study was to isolate and characterize the cell wall subunits and “glue” matrix involved in cell wall synthesis in developing cotton fibers. This study employed fibers taken from 25DPA bolls collected at 7am, noon and 7pm. Cold aqueous extracts of developing cotton were analyzed by HPAEC-PAD (Murray, 1998). Subsequent se...

Genetic Variability for Root Development in Cotton
By Muhammad Naveed Arshad on Apr 19, 2019

WCRC WCRC2

ABSTRACT Cotton root system development is under genetic control and continuously influenced by the environment. Root architectural diversity can influence the overall productivity of the plant since both uptake and distribution of water and nutrients are impacted by the size and distribution of the root system. The impact of various environmental...

Factors Affecting Yield of Okra-Leaf Cotton Types in the Mississippi Delta
By Muhammad Naveed Arshad on Apr 19, 2019

WCRC WCRC2

ABSTRACT Research throughout the 20th century has shown that okra-leaf cotton (Gossypium hirsutum L.) exhibits less boll rot, earlier maturity, reduced leaf area index and a higher CO2-uptake per unit leaf area than normal-leaf cotton. Despite these traits, okra-leaf types remain scarce in the U.S.A. However, okra-leaf cotton represents 30 to 50%...

Assessing Effects of Canopy Nitrogen and Light Distribution on Radiation Use Efficiency of Cotton
By Muhammad Naveed Arshad on Apr 19, 2019

WCRC WCRC2

ABSTRACT As a surrogate for photosynthesis, biomass accumulation at the crop level can be estimated from the product of the amount of radiation intercepted and the amount of dry matter produced per unit of radiation intercepted (radiation use efficiency, RUE). The cotton crop simulation model CERCOT uses this approach and modulates RUE in response...

Plant Proteins Responsible for Fiber Strength in Cotton
By Muhammad Naveed Arshad on Apr 19, 2019

WCRC WCRC2

ABSTRACT Enzymes and proteins of two lines of cotton differing in fiber strength were studied. The study revealed that activity of glucan synthetase and peroxidase in these lines increased with maturity, while the activity of B-(1-3)-glucanase and cellulase decreased. Specific enzymatic activity of peroxidase and glucan synthetase in line L-175 wa...

Physiological and Yield Responses of Field-grown Cotton to Shade
By Muhammad Naveed Arshad on Apr 18, 2019

WCRC WCRC2

ABSTRACT Field studies were conducted to determine the effects of an 8-day period of shade (63% light reduction) at pinhead square (PHS), first flower (FF), peak flower (PF) or boll development (BD) stage on cotton (Gossypium hirsutum L.) carbohydrate composition, mineral nutrient status, lint yield and fiber quality. Shading for 8 days at the ear...

Nitrogen Fertility Management during Water Stress in Cotton
By Muhammad Naveed Arshad on Apr 18, 2019

WCRC WCRC2

ABSTRACT Cotton is grown in a variety of climates where moisture stress is common. Stress may be chronic, occurring throughout the growing season, or acute, occurring at anytime during the season. Nitrogen management can have a significant impact on the effects of water stress. This paper presents the results of a three year study conducted in the...

Estimating Cotton Water Stress for Production Management
By Muhammad Naveed Arshad on Apr 18, 2019

WCRC WCRC2

ABSTRACT Crop water stress evaluation is essential for accurate irrigation scheduling. Cotton was grown in 1997 using four irrigation levels where canopy temperatures (TC) were continuously measured with infrared thermometers. Water level treatments were rainfall (WL1)-, 1/3 ET (WL2), 2/3 ET (WL3), and 1.0 ET (WL4). This report compares the accura...