Fusarium Wilt of Cotton in Australia
By Muhammad Naveed Arshad on Feb 21, 2019

Crop Protection WCRC WCRC2

ABSTRACT Fusarium wilt of cotton caused by the fungus Fusarium oxysporum Schletend. f.sp. vasinfectum (Atk.) Snyder and Hansen (Fov) was first recorded in Australia in 1993. Several hundred isolates of Fov have since been examined in laboratory and glasshouse studies to determine the range of genetic and pathogenic diversity in the Australian Fov...

Development of Verticillium dahliae in Cotton Plants Grown in Cukurova and Reaction of Some Cultivars to Wilt
By Muhammad Naveed Arshad on Feb 15, 2019

Crop Protection WCRC WCRC2

ABSTRACT Seven cotton cultivars were inoculated with Verticillium dahliae Kleb. using a spore suspension of 2.5x106 conidia/ml by the stem puncture technique. Infection development of symptoms on plants inoculated with T-1 and SS-4 strains were investigated until the 25th day after inoculation. Strain T-1 reached 15 cm above the inoculation point...

Fusarium Wilt Disease Manifestation in Cotton Fields of Tanzania
By Muhammad Naveed Arshad on Feb 15, 2019

Crop Protection WCRC WCRC2

ABSTRACT Investigations were conducted in Tanzania to assess factors affecting rapid spread of Fusarium wilt disease in cotton fields. The main areas of this study were the Mara and Mwanza regions where this Fusarium wilt disease is becoming increasingly important. Fusarium wilt disease is caused by Fusarium oxysporum f.sp. vasinfectum. Interviews...

Interactions of Fusarium and Verticillium Wilt with Root-Knot Nematodes in Cotton
By Muhammad Naveed Arshad on Feb 15, 2019

Crop Protection WCRC WCRC2

ABSTRACT The association between root-knot nematode (RKN) and Fusarium wilt of cotton has been known since the 19th century but the effect of RKN infection on the Verticillium wilt has not been widely investigated. Two pot experiments were conducted to study the levels of interaction of each fungal species with RKN. Each pot (11x11x12 cm) had thre...

Etiology, Incidence and Prevelance of Cotton Wilt Disease and Strains of Wilt Pathogen in Cukurova
By Muhammad Naveed Arshad on Feb 15, 2019

Crop Protection WCRC WCRC2

ABSTRACT Wilt disease surveys in 164 cotton fields of Cukurova indicated that the disease was present in 11 fields in 1994 and 12 in 1995. Verticillium dahliae Kleb. was isolated from diseased plants. Cultural and morphological characters indicated that the fungus produced erect, verticillate conidiophores and ellipsoid, one-celled, 3-5x1.2-3.1m...

Agrobacterium Bronzing and Wilt of Cotton: Epidemiology and Control
By Muhammad Naveed Arshad on Feb 15, 2019

Crop Protection WCRC WCRC2

ABSTRACT Bronzing and sudden wilt syndrome that develops in USA cotton plants during boll development in hot weather have been associated with infections of roots by Agrobacterium biovar 1 strains. Conditions favouring the multiplication of the bacteria in roots and development of symptoms include: high clay content in soil, high soil temperatures...

The Development of New Strains of Verticillium dahliae in Australia
By Muhammad Naveed Arshad on Feb 15, 2019

Crop Protection WCRC WCRC2

ABSTRACT Verticillium wilt was once the most widespread and significant disease of cotton in Australia. Several cultivars with some resistance to the disease have been released by CSIRO since 1989. These cultivars have been widely adopted and grown repeatedly. The results of annual disease surveys and field experiments have shown that repeated cul...

Cotton Leaf Curl Virus: A Threat to Pakistan Cotton
By Muhammad Naveed Arshad on Feb 15, 2019

Crop Protection WCRC WCRC2

ABSTRACT Spread of cotton leaf curl virus (CLCuV) in cotton growing areas of Punjab cause immense losses in cotton production in Pakistan. It appeared in epidemic form in 1998, but became serious from 1992-93. Studies to combat this problem centres around the characterization of virus, its vector (whitefly), alternate host and the causative enviro...

Distribution of Heliothine Larvae in Bt and Non-Bt Cotton in Texas
By Muhammad Naveed Arshad on Feb 14, 2019

Crop Protection WCRC WCRC2

ABSTRACT Knowledge of population dynamics in heliothines in transgenic cotton is needed to develop resistance management strategy and scouting guidelines. The spatial distribution of heliothine larvae within and among transgenic cotton plants is likely to be influenced by variation in toxin expression within individual plants and throughout the gr...

Chlorguard Plus: New Insecticide Combination Product Effective Against Cotton Bollworm, Helicoverpa armigera (Hb.)
By Muhammad Naveed Arshad on Feb 14, 2019

Crop Protection WCRC WCRC2

ABSTRACT Studies undertaken to manage bollworm, Helicoverpa armigera Hübner in irrigated cotton in Raichur, India over three seasons, indicate some benefits of using certain insecticide mixtures. These benefits included an overall reduction in sucking pests and reduced damage by H. armigera. Resistance of H. armigera was lower to mixtures than to...

Okra-Leaf and Normal Leaf Cotton Resistance to Silverleaf Whitefly
By Muhammad Naveed Arshad on Feb 14, 2019

Crop Protection WCRC WCRC2

ABSTRACT Okra-leaf and normal leaf upland cotton cultivars and experimental breeding-lines were evaluated for susceptibility to silverleaf whitefly, Bemisia argentifolii Bellows and Perring and cotton leaf crumple disease caused by cotton leaf crumple geminivirus (CLCV). In March 1997, 16 cotton cultivars and breeding-lines were sown into a random...

Cotton Insect Pest Control with Indoxacarb
By Muhammad Naveed Arshad on Feb 14, 2019

Crop Protection WCRC WCRC2

ABSTRACT The cotton insect pest spectrum is dominated by the orders Lepidoptera and Homoptera. The status of different pests and control measures on cotton is dynamic and varies with geography and pest complex. Indoxacarb, a new broad-spectrum Lepidoptera control agent with some activity against Homoptera (e.g. Empoasca spp.), has a unique mode of...

Synergistic Effect of Piperonyl Butoxide on the Toxicity of Delyamethrin Against Two Resistant Strains of the Bollworm
By Muhammad Naveed Arshad on Feb 14, 2019

Crop Protection WCRC WCRC2

ABSTRACT Helicoverpa armigera is a key-pest of cotton in West Africa, controlled by pyrethroids for more than twenty years. In the Côte d’Ivoire, susceptibility to pyrethroids is monitored every year on populations collected in Bouaké at the end of the season (BK strains). A loss of effectiveness to cypermethrin and deltamethrin has been observed...

Resistance of Aphis gossypii (Homoptera:Aphididae) to Insecticides
By Muhammad Naveed Arshad on Feb 14, 2019

Crop Protection WCRC WCRC2

ABSTRACT The cotton aphid Aphis gossypii is a serious cotton pest in some regions of Greece. Recently, reports from different regions suggest that it can no longer be controlled with applications of insecticides that were formerly effective, especially organophosphates and pyrethroids. Laboratory biossays were conducted from 1993 to 1997 to determ...

Bt Cotton: Status of Heliothine Resistance in the United States
By Muhammad Naveed Arshad on Feb 14, 2019

Crop Protection WCRC WCRC2

ABSTRACT Resistance to the delta endotoxin proteins of Bacillus thuringiensis (Bt) by insects is receiving considerable interest both nationally and internationally for three primary reasons: unprecedented interest on the part of the environmental community and organic producers; the registration and deployment of transgenic plants in many countri...

Esterase Inhibitors Restore Pyrethroid Susceptibility in Australian Helicoverpa armigera
By Muhammad Naveed Arshad on Feb 14, 2019

Crop Protection WCRC WCRC2

ABSTRACT Pyrethroid resistance in Australian Helicoverpa armigera field populations is primarily a consequence of the over production of esterase isoenzymes that metabolize and possibly sequester pyrethroid insecticides. Biochemical studies show that organophosphorous compounds inhibit pyrethroid resistance associated esterases in H. armigera. Est...

Predatory Arthropods in Australian Cotton Fields
By Muhammad Naveed Arshad on Feb 14, 2019

WCRC Croprotection-EastSouthAfrica WCRC2

ABSTRACT Over 50 species of predatory arthropods have been recorded in Australian cotton fields. The complex of generalist predators in Australian cotton has similarities and differences to those in other countries. It is dominated by coccinelids and other beetle species, bugs, ants and spiders. These predators attack Helicoverpa armigera and H. p...

Antixenosis and Antibiosis Determination to Bollworm (Heliothis virescens) in Seven Advanced Lines and Three Cultivars of Cotton (Gossypium hirsutum L.) in Argentina
By Muhammad Naveed Arshad on Feb 14, 2019

Crop Protection WCRC WCRC2

ABSTRACT Antixenosis to Heliothis virescens was evaluation in trials to test genetic resistance in three cultivars and seven advanced lines of cotton. Genotypes tested were: 1-Pora INTA, 2-Guazuncho2 INTA, 3- “okra leaf”, 4-”glandless”, 5-”without trichomes”, 6-”nectariless”, 7-”without trichomes - okra leaf”, 8-”frego bract”, 9-Deltapine 90 and a...

Composting Cotton Mill Waste
By Muhammad Naveed Arshad on Feb 12, 2019

WCRC WCRC2 Cotton and Environmrnt

ABSTRACT Composting of cotton mill wastes may provide means for the production of a stable organic material, useful for soil improvement and as a substrate for plant growth. The aim of this work was to examine the composting process of cotton wastes and to evaluate the produced compost. Three composting piles were formed. In the first the ratio C/...

Cotton Pesticides in Perspective: Minimizing their Impact on Produce and in Riverine Ecosystems
By Muhammad Naveed Arshad on Feb 12, 2019

WCRC WCRC2 Cotton and Environmrnt

ABSTRACT Despite measures taken to reduce reliance on chemicals (e.g. Ingard cotton), production of Australian cotton still involves significant inputs of pesticides, with the potential to contaminate other agricultural produce and riverine ecosystems. Since 1993, the environmental fate and transport of pesticides used in cotton growing have been...