Spatial Distribution of Preimaginal Bemesia tabaci (Homo-ptera: Aleyrodidae) in Cotton
By Muhammad Naveed Arshad on Feb 22, 2019

Crop Protection WCRC WCRC2

ABSTRACT Studies were conducted to examine the distribution of preimaginal Bemesia tabaci (Gennadius) in cotton, Gossypium hirsutum L. at various locations in 1996 and 1997. The number of eggs and nymphs were counted on the underside of leaves from the top, middle and bottom thirds of the plants. Fifty to one hundred leaf samples were taken from e...

Mass Rearing and Use of a New Species of Chrysoperla (NeuropteraL Chrysopidae) in Cotton Crops in Argentina
By Muhammad Naveed Arshad on Feb 22, 2019

Crop Protection WCRC WCRC2

ABSTRACT In the larval stage, Chrysoperla (Steiman) species feed on various agricultural pests. So far, only Chrysoperla externa had been recorded on cotton crops in Argentina. Towards the end of 1994, Chrysoperla chaquensis was discovered in the province of Salta, being predominant in the western region of the Argentinian cotton area, while C. ex...

The Influence of Host Plants on the Mating Success of the Cotton Bollworm,
By Muhammad Naveed Arshad on Feb 22, 2019

Crop Protection WCRC WCRC2

ABSTRACT The chances of a moth mating successfully may depend on the type of crop or other vegetation surrounding it. Mating trays were used to determine the mating success of Helicoverpa armigera (Hübner) in various crops in the Darling Downs, Queensland, Australia during the 1996/97 and 1667/98 seasons. Moth abundance was assessed with pheromone...

Survival and Control of the Boll Weevil, Anthonomus grandis, Around Overwintering Habitat in the United States
By Muhammad Naveed Arshad on Feb 22, 2019

Crop Protection WCRC WCRC2

ABSTRACT A field and a laboratory experiment were performed to evaluate factors that influence the overwinter survival of boll weevil, Anthonomus grandis Boheman, populations. Spring surveys of boll weevil densities were conducted as indicators of overwintering survival in 1994, 1995, 1996 and 1997 in four Arkansas counties. Approximately 1000 tra...

Seasonal Ecology of Deraeocoris pallens (Hemiptera: Miridae) in Cotton
By Muhammad Naveed Arshad on Feb 22, 2019

Crop Protection WCRC WCRC2

ABSTRACT Deraeocoris pallens Reut. is the most commonly observed predator in cotton fields of Çukurova region in Turkey. Population developments D. pallens and other cotton pests were monitored in four different cotton fields in 1992 and 1993. The number of aphids, spider mites, thrips and whiteflies were counted on fifteen cotton leaves randomly...

The Status of Bemesia as a Cotton Pest: Past Trends and Future Possibilities
By Muhammad Naveed Arshad on Feb 21, 2019

Crop Protection WCRC WCRC2

ABSTRACT Bemesia tabaci was first recognized as a cotton pest in India early in the 20th Century. Between 1970 and 1980, severe outbreaks occurred in Sudan, Turkey and Israel, followed by California, on vegetable crops and cotton. In 1989-90, epidemic infestations occurred on cotton in the USA, followed by Mexico and then South America and Asia. T...

Parasitism and Other Mortality in the Cotton Boll Weevil Anthonomus grandis Boh. (Coleoptera:Curculionidae) in Paraguay
By Muhammad Naveed Arshad on Feb 21, 2019

Crop Protection WCRC WCRC2

ABSTRACT Boll weevil (Anthonomus grandis Boh.) parasitism by 2 hymenopterous parasites, tentatively identified as Catolaccus sp. and Bracon sp., was found in the San Pedro province, Paraguay, in 1995-96 to reach astonishingly high levels often killing 100 % of the immature host population. Another key mortality factor was egg non-viability; 27% of...

Movement of Boll Weevils in Three Areas of Texas Relative to Cotton Plant Phenology
By Muhammad Naveed Arshad on Feb 21, 2019

Crop Protection WCRC WCRC2

ABSTRACT This investigation was conducted in three separate areas of Texas using baited traps around cotton fields and in all four directions one mile apart, up to five miles from the test site, to define the movement and mechanism of boll weevil survival during the cotton season. Generally, more boll weevils were captured at sites away from cotto...

Capture of Alabama argillacea Hübner (Lepidoptera: Noctuidae) Adults in Light Traps in Cotton,
By Muhammad Naveed Arshad on Feb 21, 2019

Crop Protection WCRC WCRC2

ABSTRACT In cotton crop management it is important to carry out periodic scouting to evaluate the degree of infestation with lepidopteran pests, which can be captured at the adult stage with light traps and/or specific pheromones. The objective of this study was to try to identify an association between Alabama argillacea adults captured in lig...

Morphophysiological Changes of Cotton under Saline Stress in the Presence of Fusarium oxysporum sp
By Muhammad Naveed Arshad on Feb 21, 2019

Crop Protection WCRC WCRC2

ABSTRACT Fusarium wilt in cotton causes the greatest damage on sandy soil, acid, potassium deficient and saline soils. Because Fusarium wilt is more virulent under saline stress, the morphophysiological variations predisposing cotton plants under saline stress to the disease were evaluated. Seed of two cotton (Gossypium hirsutum L.) cultivars, Cok...

Management of Cotton Leaf Curl Virus Disease in India
By Muhammad Naveed Arshad on Feb 21, 2019

Crop Protection WCRC WCRC2

ABSTRACT Cotton leaf curl viral disease (CLCuV) incidence has increased in northern states of India (Punjab, Haryana and Rajasthan) since 1993. CLCuV reduces the number of harvestable bolls by 15-87 per cent and seed cotton yield by 11-92 per cent, depending on the extent and time of infection. The whitefly (Bemisia tabaci) and inoculum are presen...

Search for Elite Sources of Resistance to Leaf Curl Virus in Upland Cotton
By Muhammad Naveed Arshad on Feb 21, 2019

Crop Protection WCRC WCRC2

ABSTRACT Cotton leaf curl virus (CLCuV) is a serious disease of cotton in the state of Punjab, causing heavy losses in an epiphytotic year. During kharif season (May-November) 1997, 284 entries from different state and co-ordinated trials, and 592 germplasm lines/cultivars were screened against CLCuV at PAU, Regional Research Station, Faridkot and...

Development of Genotypes that are Tolerant to Verticillium Wilt in Iran
By Muhammad Naveed Arshad on Feb 21, 2019

Crop Protection WCRC WCRC2

ABSTRACT Verticillium wilt is a serious disease of cotton in northern Iran. It is favoured by cool air and soil conditions. Control measures include cultural practices and the cultivation of regionally adapted tolerant cultivars but the effectiveness of these measures depends on the that are to the causal strain of the disease and the inoculum lev...

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...