Posts
MODELLING PHEROMONE USE FOR PINK BOLLWORM CONTROL IN EGYPT
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents In 1994 Egypt will use artificial pheromones for pink bollworm control on 150,000 ha of cotton, 45% of the national crop. The COT plant and insect simulation model has been initialised for the main long staple cotton varieties (Giza'75 and...
PROBLEMS AND PROSPECTS OF MANAGEMENT OF INSECTICIDE RESISTANCE IN HELICOVERPA ARMIGERA (HÜBNER) IN INDIA
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents Insecticide resistance in Helicoverpa armigera (Hübner) is a major threat to crop production in India. Critical gaps in the knowledge base for management of resistant H. armigera in India are identified. The status, need and constraints t...
IMPACT OF THE INTRODUCTION OF THE COTTON BOLL WEEVIL IN BRAZIL
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents The populations of Anthonomus grandis Boheman that were first reported in Brazil in the state of São Paulo in February 1983, and in the state of the Paraíba in the northeastern region in August 1983, are morphologically similar to the south...
INSECTICIDE RESISTANCE IN MAJOR COTTON PESTS WORLDWIDE: INCIDENCE, MECHANISMS AND MANAGEMENT
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents Management of insect pests is required for successful cotton production in most of the world's cotton producing areas. For many years insecticides have played the primary role in management programs. The occurrence of resistance is now li...
STATUS OF TOBACCO BUDWORM PYRETHROID RESISTANCE IN MEXICO
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents The tobacco budworm (TBW) Heliothis virescens (F.) is a common insect pest of cotton in Mexico. Since the early 1980s pyrethroids have been used successfully for control of this and other insect pests of cotton. In order to evaluate the res...
EFFECTIVE SPRAY COVERAGE MEASURING PROCEDURES
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents A computer vision system was developed to analyse spray coverage on leaves and target paper strips. The rapid computer analysis of the captured image gives the size distribution of the droplets and the relative area of the target that was...
INCREASED DEPOSITION OF INSECTICIDE USING TURBULENT AIR ASSISTANCE
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents A canopy turbulent air jet sprayer was evaluated and found to achieve better coverage of both sides of cotton leaves. This opens up the possibility for the use of lower rates of conventional insecticides and perhaps also non-toxic crop oils...
INTEGRATED PEST MANAGEMENT IN COTTON
By
Michel Fok
on
Mar 13, 2017
Introduction Back to Table of contents Mr Chairman, Ladies and Gentlemen; it is a great honour to be asked to give this keynote address on Integrated Pest Management in Cotton (IPM) to this distinguished and expert audience representing such a large number of countries and such a wi...
DEVELOPMENT OF LABORATORY AND FIELD ELISA TESTS FOR DETECTION OF ENDOSULFAN IN WATER AND SOIL
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents Environmental monitoring of endosulfan residues is currently being achieved by gas chromatographic analysis, but there is a need for faster and cheaper analysis that can be conducted in the field as well as in the laboratory. To satisfy thi...
THE FATE OF ENDOSULFAN SPRAYED ON COTTON
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents An extensive analysis of the total burden of endosulfan in cotton growing soils has been conducted over the past three years on four cotton fields in the Namoi valley of northern New South Wales. The study indicates that the maximum total b...
COMPARATIVE INFORMATION ON THE LOCAL ABUNDANCE OF TWO PESTS, HELICOVERPA ARMIGERA (HÜBNER) (LEPIDOPTERA: NOCTUIDAE) AND APHIS GOSSYPII (GLOVER) (HOMOPTERA: APHIDIDAE) AND SELECTED PREDATORS ON COTTON IN EASTERN TANZANIA
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents Seasonal occurrence of predators of Helicoverpa armigera (Hübner) and Aphis gossypii (Glover) on cotton was studied between 1989 and 1991 in eastern Tanzania. Major predators were chrysopids, coccinellids, syrphids and ants. These predators...
THE USE OF BACULOVIRUSES IN COTTON IPM
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents Insect pathogenic baculoviruses offer a means of pest control that is safe to non-target organisms and environmentally benign. Control of insect pests on cotton with baculoviruses as an alternative to, or in conjunction with, chemical inse...
SYNTHETIC PYRETHROID INDUCED COTTON PLANT LEAF TISSUE MORPHOLOGICAL CHANGES AND INCIDENCE OF BEMISIA TABACI
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents Trials were conducted during the 1989 and 1990 cotton growing seasons at Parbhani, Maharashtra State, India to study the impact of synthetic pyrethroids on the incidence of the whitefly, Bemisia tabaci (Gennadius). Treatments consisted of:...
INSECTICIDE RESISTANCE MANAGEMENT AS A PART OF AN IPM STRATEGY IN ISRAELI COTTON FIELDS
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents Since the 1950s, growing cotton in Israel, has been associated with many pesticide applications, mainly against the whitefly, Bemisia tabaci (Gennadius), the Egyptian cotton leafworm, Spodoptera littoralis (Boisduval), the pink bollworm, Pe...
FIPRONIL: A NEW SOIL AND FOLIAR INSECTICIDE FOR COTTON
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents Fipronil [(+)-5-amino-1-(2,6-dichloro-a,a,a-trifluoro-p-toly)-4-tri-fluoromethylsulfinylpyrazole-3-carbonitrile] is a new pyrazole insecticide that provides excellent control of many foliar insects on cotton. Fipronil at 100 g a.i./ha appl...
CHEMICAL CHARACTERIZATION OF COTTON INSECT HONEYDEW AND ELIMINATION OF STICKINESS OF HONEYDEW-CONTAMINATED LINT
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents Cotton fiber stickiness due to honeydew from insect infestations is a severe problem in many cotton producing countries. In the southwest United States, honeydew secreted by the sweetpotato whitefly (Bemisia tabaci Gennadius) or cotton aph...
AREA–WIDE MANAGEMENT OF HELIOTHIS/HELICOVERPA IN THE DELTA OF MISSISSIPPI
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents Utilizing an entomopathogenic virus on alternate hosts as the main pre–crop treatment, a pilot test was conducted in 1990 and 1992 to manage Heliothis virescens (F.) and Helicoverpa zea (Boddie) in cotton in a 259 square kilometer area in t...
MIGRATION OF COTTON PESTS: PATTERNS AND IMPLICATIONS FOR MANAGEMENT
By
Michel Fok
on
Mar 13, 2017
Introduction Back to Table of contents Cotton has a large pest complex (Matthews, 1989), and many of the major pests are migratory to some degree. Kennedy (1975) distinguished insect migration from dispersal because of the persistent, straightened-out movement, and unresponsiveness t...
CONTROLLED ENVIRONMENT STUDY OF THE DEGRADATION OF ENDOSULFAN IN SOILS
By
Michel Fok
on
Mar 13, 2017
Abstract Back to Table of contents The degradation rate of endosulfan applied to a Black Earth soil from South East Queensland, was studied in controlled environment chambers. The degradation rates of a- and b-endosulfan were determined for the soil samples kept at the const...
THE USE OF PHEROMONES TO CONTROL THREE SPECIES OF BOLLWORM IN PAKISTAN
By
Michel Fok
on
Mar 13, 2017
Introduction Back to Table of contents The pink bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae) is a major world-wide pest of cotton. Once the eggs have hatched and the larvae have entered into the bolls it is difficult to control using conventional insectic...