VOLATILE TERPENES AND TERPENOID ALDEHYDES IN AUSTRALIAN-GROWN GOSSYPIUM HIRSUTUM L. CULTIVARS AND LINES
By Michel Fok on Mar 10, 2017

Breeding & Genetic improvement WCRC Breeding-Australia WCRC1

Abstract                                                                         Back to Table of contents Volatile terpenes were assayed in sixteen Gossypium hirsutum L. genotypes, seven of which were also analysed for terpenoid aldehydes. Consistent with previous studies, the major volatile terpenes detected were trans-b-caryophyllene, b-bisab...

MECHANISMS OF DISEASE RESISTANCE IN GOSSYPIUM SPECIES AND VARIATION IN VERTICILLIUM DAHLIAE
By Michel Fok on Mar 10, 2017

Breeding & Genetic improvement WCRC Breeding-NorthAmerica WCRC1

Introduction                                                                Back to Table of contents Studies on Verticillium wilt of cotton have concentrated on host resistance to the pathogen and on genetic variation and mechanisms of virulence in Verticillium dahliae.  The resistance of cotton to V. dahliae depends on a number of anatomical a...

HYBRID COTTON RESULTS AND PROSPECTS
By Michel Fok on Mar 10, 2017

Breeding & Genetic improvement WCRC Breeding-Asia WCRC1

Abstract                                                                         Back to Table of contents Hybrid 4 ushered in the era of hybrid cotton in India in the 1970s.  Hybrids both intra and interspecific now occupy about 28% of the cotton area and contribute about 42% of production of the country.  Inspired by the unique success of hybr...

QUALITY ASSESSMENT FOR BREEDING EGYPTIAN HIGH QUALITY COTTON VARIETIES
By Michel Fok on Mar 10, 2017

Breeding & Genetic improvement WCRC Breeding-MedMiddleEast WCRC1

Abstract                                                                         Back to Table of contents The cotton breeding program in Egypt has developed over a long time.  Strong emphasis has always been put on quality and a good deal of improvement  with  yield potential and agronomic characters. Methods of quality measurement and  eval...

IMPERIAL VALLEY COTTON FIELDS SURVEYED WITH PLANT MAPPING
By Michel Fok on Mar 10, 2017

Agronomy & physiology WCRC Agro-Physio-north-america WCRC1

Abstract                                                                         Back to Table of contents We introduced the University of California Plant Mapping Program to growers in the Imperial Valley for the first time for the 1993 cotton season.  Because the equations used in the program were derived from data collected in the San Joaquin...

METHAM IN COTTON
By Michel Fok on Mar 10, 2017

Agronomy & physiology WCRC Agro-Physio-north-america WCRC1

Abstract                                                                         Back to Table of contents Metham is a soil fumigant which is used to kill germinating weed seeds and organisms in the  soil such as nematodes and fungi.  In cotton, nightshade and nutsedge are among the most difficult weeds to control.  Several trials were conducted...

EFFECT OF FOLIAR APPLIED NITROGEN AND POTASSIUM ON COTTON IN THE SAN JOAQUIN VALLEY OF CALIFORNIA
By Michel Fok on Mar 10, 2017

Agronomy & physiology WCRC Agro-Physio-north-america WCRC1

Abstract                                                                         Back to Table of contents Improved cotton varieties and improved cultural practices have caused lint cotton yields to improve at a rate of 36 kg ha-1 year-1 over the past ten years. Earlier maturing varieties, 76 cm rows, better irrigation regimes, improved pest man...

NIGHTSHADE CONTROL WITH PYRITHIOBAC SODIUM (STAPLE) IN CALIFORNIA COTTON
By Michel Fok on Mar 10, 2017

Agronomy & physiology WCRC Agro-Physio-north-america WCRC1

Abstract                                                                         Back to Table of contents The control of nightshade species with pyrithiobac Sodium at rates up to 210 liters/ha with and  without fluazifop, methanearsonate, and surfactants were examined from 1991-1993.  Phytotoxicity  to Acala cotton was also evaluated. Contro...

DETERMINING NON-EROSIVE VELOCITIES FOR DESIGN OF CONTOUR BANKS
By Michel Fok on Mar 10, 2017

Agronomy & physiology WCRC Agro-physio-australia WCRC1

Abstract                                                                         Back to Table of contents One farming system found to give good control of erosion on sloping agricultural land is the use of agronomic measures in conjunction with contour banks.  Contour banks constructed with a constant gradient result in layouts with interbank a...

RESPONSE OF COTTON TO NPK FERTILIZATION - THE GREEK EXPERIENCE
By Michel Fok on Mar 10, 2017

Agronomy & physiology WCRC Agro-phyisio-Med-MiddleEast WCRC1

Abstract                                                                         Back to Table of contents Cotton is an economically important crop in Greece and experiments to determine the response of cotton to rates of fertilizers have always been an important part of research. The first experiments started almost 40 years ago and low rates o...

VIRTUAL COTTON: A NEW TOOL FOR RESEARCH, MANAGEMENT AND TRAINING
By Michel Fok on Mar 10, 2017

Agronomy & physiology WCRC Agro-physio-australia WCRC1

Abstract                                                                         Back to Table of contents "Virtual plants" are computer abstractions which contain sufficient spatial information for realistic images of successive growth stages to be generated.  Virtual plants are assembled by software which interprets rules of growth worked out...

THE EFFECT OF STORAGE AND RADIATION ON COTTON SEED FOR SOME YIELD COMPONENTS
By Michel Fok on Mar 10, 2017

Agronomy & physiology WCRC Agro-phyisio-Med-MiddleEast WCRC1

Abstract                                                                         Back to Table of contents This research was set to study the effect of gamma irradiation (20 Kr.) on variability, heritability and the genetic advance upon selection for some economic traits and yield components. Dried seeds of three Egyptian cotton cultivars were u...

STRUCTURE REPAIR WITH WET/DRY CYCLES IN A COTTON SOIL
By Michel Fok on Mar 10, 2017

Agronomy & physiology Agro-physio-australia

Abstract                                                                         Back to Table of contents Eighty percent of irrigated cotton in Australia is grown under the management system of retained beds.  In this system wheel traffic is restricted to furrows and beds are only lightly cultivated.  Furrow compaction becomes a problem when hi...

FUTURE WEED CONTROL SYSTEMS FOR CONSERVATION TILLAGE COTTON IN THE SOUTHEASTERN USA
By Michel Fok on Mar 10, 2017

Agronomy & physiology WCRC Agro-Physio-north-america WCRC1

Abstract                                                                         Back to Table of contents Bromoxynil used with transgenic cotton and pyrithiobac provided early season postemergence control of annual morningglory, Ipomoea spp., prickly sida, Sida spinosa, velvetleaf, Abutilon theophrasti, and common cocklebur, Xanthium strumarium...

POTASSIUM NUTRITION OF COTTON IN THE USA, WITH PARTICULAR REFERENCE TO FOLIAR FERTILIZATION
By Michel Fok on Mar 10, 2017

Agronomy & physiology WCRC Agro-Physio-north-america WCRC1

Abstract                                                                         Back to Table of contents Widespread late-season potassium (K) deficiency in the US Cotton Belt has focused attention on K nutrition of cotton (Gossypium hirsutum L.).  Potassium is required in large amounts by cotton for normal crop growth and fiber development, wi...

INFLUENCE OF SALINITY ON REPRODUCTIVE GROWTH OF THREE EGYPTIAN COTTON CULTIVARS
By Michel Fok on Mar 10, 2017

Agronomy & physiology WCRC Agro-phyisio-Med-MiddleEast WCRC1

Abstract                                                                         Back to Table of contents The objective of this study was to investigate to what extent salinity affects the reproductive growth of three Egyptian cotton cultivars Giza 77, Giza 75 and Giza 80. The salinity levels were 0, 2000, 4000 and 6000 ppm of either NaCl, NaCl...

PLANT RESPONSES TO LATE SEASON WATER DEFICITS IN ACALA COTTON CULTIVARS
By Michel Fok on Mar 10, 2017

Agronomy & physiology WCRC Agro-Physio-north-america WCRC1

Abstract                                                                         Back to Table of contents Continued development of irrigation strategies that minimize crop yield losses, while increasing water use efficiency are needed in many semi-arid and arid cotton producing areas world wide.  Controlled deficit irrigation (CDI) incorporates...

SOWING DATE AND NITROGEN APPLICATION EFFECTS ON PETIOLE NITRATE CONTENT IN CAMEROON
By Michel Fok on Mar 10, 2017

Agronomy & physiology WCRC Agro-physio-West-Central-Africa WCRC1

Abstract                                                                         Back to Table of contents Studies were conducted in Maroua under Sudano-Sahelian conditions to estimate the effects of sowing date and nitrogen application on petiole nitrate content of cotton. The dry weight and petiole nitrate content of the 4th leaf from the top...

SOIL MANAGEMENT OPTIONS FOR COTTON-BASED FARMING SYSTEMS IN SWELLING AND NON-SWELLING SOILS
By Michel Fok on Mar 10, 2017

Agronomy & physiology WCRC Agro-physio-australia WCRC1

Abstract                                                                         Back to Table of contents The yield of cotton lint in Australia has increased greatly over the last 15 years.  This improvement is due partly to the development of soil management systems that are based on the objective measurement of soil structure in individual fi...

THE OPTIMISATION OF SOIL STRUCTURE FOR COTTON PRODUCTION
By Michel Fok on Mar 10, 2017

Agronomy & physiology Agro-physio-australia

Abstract                                                                         Back to Table of contents In cropping soils, optimising soil structure means minimising soil structure degradation and emphasising natural processes of structure formation.  Man-made soil structure degradation (compaction and shear stresses) has been shown to reduce...