THAI COTTON GROWERS STILL FAR AWAY FROM IPM: CONTRIBUTION OF SYSTEMS APPROACH TO A BETTER UNDERSTANDING OF FARMERS' PRACTICES
By Michel Fok on Mar 13, 2017

Crop Protection Croprotection-Asia

Abstract                                                                         Back to Table of contents On-farm surveys have been performed since 1991 in two cotton growing areas in Thailand for three cropping seasons. A systems approach focused on farmers' technical choices in relation to characteristics of the bio-physical and socio-economi...

IMPACT OF BOLL WEEVIL ERADICATION ON COTTON PRODUCTION AND INSECT MANAGEMENT IN VIRGINIA AND NORTH CAROLINA, USA
By Michel Fok on Mar 13, 2017

Crop Protection WCRC Croprotection-NorthAmerica WCRC1

Abstract                                                                         Back to Table of contents A boll weevil (Anthonomus grandis [Boheman]) eradication program was begun in September 1978 as an approximately 6,000 ha upland cotton (Gossypium hirsutum L.) trial in the northeast counties of North Carolina (NC) and the southeast corner...

INSECTICIDE RESISTANCE IN HELICOVERPA ARMIGERA (HÜBNER): STATUS AND PROSPECTS FOR ITS MANAGEMENT IN INDIA
By Michel Fok on Mar 13, 2017

Crop Protection WCRC Croprotection-Asia WCRC1

Abstract                                                                         Back to Table of contents Insecticide resistance and concomitant field failures to control the cotton bollworm, Helicoverpa armigera (Hübner) were first recorded in south India in 1987. During the 1992/93 cropping season a discriminating dose technique was used to r...

PYMETROZINE (CGA 215,944) - A NOVEL NEW CONTROL FOR SUCKING PESTS IN COTTON
By Michel Fok on Mar 13, 2017

Crop Protection WCRC Croprotection-NorthAmerica WCRC1

Abstract                                                                         Back to Table of contents Pymetrozine is a novel insecticide for the control of aphids and other sucking pests in cotton and represents a new class of control agents.  The compound interferes in the feeding behaviour of insects and controls insects resistant to stan...

SCREENING OF SOMATIC MUTANTS FOR RESISTANCE TO VERTICILLIUM WILT IN GOSSYPIUM HIRSUTUM L.
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement WCRC Breeding-Asia WCRC1

Abstract                                                                         Back to Table of contents Growth and phytotoxin-producing conditions of the Tianman isolate of V. dahliae were studied showing that filtrates of the pathogen cultures were able to make cotton seedlings wilt or die.  Furthermore, the filtrates decreased seed germinat...

INHERITANCE AND GENETIC EFFECT OF CLEISTOGAMY IN UPLAND COTTON
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement WCRC Breeding-Asia WCRC1

Abstract                                                                         Back to Table of contents Generally Gossypium hirsutum and G. barbadense flowers are chasmogamous. A true-breeding, cleistogamous line was derived from the F2 population of an interspecific cross between G. hirsutum and G. barbadense.  The inheritance of cleistogamy...

IDENTIFICATION OF THE KARYOTYPE OF GOSSYPIUM BICKII PROKH.*
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement WCRC Breeding-Asia WCRC1

Introduction                                                                Back to Table of contents Chromosome spreads from the root tips of Gossypium bickii Prokh. were analysed to establish an accurate karyotype.  Of 122 cells with clear chromosomes, about 60% (73) did not show any satellites.  Nine exhibited four visible satellites, one sma...

COMMERCIAL UTILISATION OF THE OKRA LEAF MUTANT OF COTTON - THE AUSTRALIAN EXPERIENCE
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement WCRC Breeding-Australia WCRC1

Abstract                                                                         Back to Table of contents Effects of the okra leaf (OL) mutant of cotton on plant and agronomic traits, and its interaction with insect pests are reviewed.  While a number of favourable effects e.g. reduction of bollrot, earliness of maturity have often been noted,...

DEVELOPMENT OF MAR COTTON GERMPLASM WITH MORPHOLOGICAL MUTANT TRAITS
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement WCRC Breeding-Asia WCRC1

Abstract                                                                         Back to Table of contents Higher levels of resistance to insects, plant pathogens, and abiotic stresses are needed in cotton cultivars to maintain plant health and increase yield.  The multi-adversity resistance (MAR) program has been successful in transferring and...

HIGH SPEED MEASUREMENTS OF STRENGTH AND ELONGATION
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement WCRC Breeding-NorthAmerica WCRC1

Abstract                                                                         Back to Table of contents High volume instruments used to class cotton for market are rapid and objective.  Accurate measurements combined with premiums and discounts for specific quality factors provides a good vehicle for cotton improvement. Many textile mills now...

POTENTIAL FOR CROP IMPROVEMENT WITH EXOTIC GERMPLASM AND GENETIC ENGINEERING
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement WCRC Breeding-NorthAmerica WCRC1

Introduction                                                                Back to Table of contents Of all management strategies applied to crop production, selection of a cultivar with enhanced genetics is the most significant.  The extent of genetic expression contributing to the performance of a crop in its environment is often overlooked o...

PERFORMANCE OF F1 AND F2 HYBRIDS BETWEEN AUSTRALIAN AND USA COMMERCIAL COTTON CULTIVARS
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement WCRC Breeding-Australia WCRC1

Abstract                                                                         Back to Table of contents Research on F1 cotton hybrids in Australia has produced some promising examples of heterosis but results have been inconsistent.  Given the difficulties of F1 seed production, little research has been conducted in recent years.  However rec...

INTERSPECIFIC HYBRIDIZATION AND SYNTHESIS OF ALLOTETRAPLOID GENOTYPES IN COTTON
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement WCRC Breeding-Asia WCRC1

Abstract                                                                         Back to Table of contents Cotton is an important commercial crop of the world.  It has four cultivated and 41 wild species.  The genes for resistance to various biotic and abiotic stresses along with desirable fibre quality traits exist in the wild species of cotton...

HETEROSIS BREEDING FOR CROSSING PRESENT YIELD BARRIERS IN COTTON
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement WCRC Breeding-Asia WCRC1

Abstract                                                                         Back to Table of contents India is the first country in the world to commercially exploit the phenomenon of heterosis in cotton.  At present 27% of the total area under cotton in India is grown under hybrids but their share of total cotton production is more than 40...

COTTON RESEARCH AND PRODUCTION IN BANGLADESH
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement WCRC Breeding-Asia WCRC1

Introduction                                                                 Back to Table of contents In Bangladesh, Upland cotton is grown between latitudes 23˚ N and 26˚ N, at an altitude of just a few metres above sea level.  Production is almost entirely in the hands of smallholders, cultivating plots of 0.4 hectares of less.  Almost 90% of...

DEVELOPMENT OF MEDIUM STAPLE HIGH STRENGTH COTTON SUITABLE FOR ROTOR SPINNING SYSTEMS
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement Breeding-Asia

Abstract                                                                         Back to Table of contents A major breakthrough in cotton spinning technology was achieved about three decades ago when the open-end (OE) spinning system was developed. Among the different versions developed such as Rotor, Friction and Air-jet, the first one has gain...

PERFORMANCE OF EARLY AND LATE MATURING VARIETIES OF COTTON (GOSSYPIUM HIRSUTUM L.) IN THE MARGINAL RAINFALL AREAS OF CENTRAL AND EASTERN KENYA
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement WCRC Breeding-EastSouthAfrica WCRC1

Abstract                                                                         Back to Table of contents A study was carried out to identify a variety of Gossypium hirsutum L. cotton suitable for the bimodal rainfall areas of Central and Eastern Kenya. The two objectives were to identify an early maturing variety that can be grown either in th...

CRYSTALLINITY, CRYSTALLITE SIZE, FINE STRUCTURAL AND PHYSICAL FIBRE PROPERTIES AT TWO FIBRE MATURITY LEVELS IN TWO EGYPTIAN COTTON CULTIVARS
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement Breeding-MedMiddleEast

Abstract                                                                         Back to Table of contents Fibre maturity is an important characteristic of cotton. It affects the yield of lint as well as the quality of cotton fibre. Two ELS Egyptian cotton cultivars, Giza 45 and Giza 77, were used in this study at 65% and 80% fibre maturity leve...

NEW COTTON VARIETIES FOR IPM
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement WCRC Breeding-MedMiddleEast WCRC1

Abstract                                                                         Back to Table of contents The major insect pests attacking cotton in the Sudan are the American bollworm, Helicoverpa armigera (HB), jassids, Jacobiasca lybica (De Berg), whitefly, Bemisia tabaci (Genn.) and aphids, Aphis gossypii (Glover). Chemical control is wi...

USE OF MOLECULAR MARKERS IN COTTON BREEDING
By Michel Fok on Mar 13, 2017

Breeding & Genetic improvement WCRC Breeding-NorthAmerica WCRC1

Abstract                                                                         Back to Table of contents Molecular markers (MM) are a new genetic tool which have the potential to enhance selection efficiency in cotton (Gossypium species) breeding.  There are about 80 morphological traits that have been used to identify 17 linkage groups in G....