A model to simulate the population dynamics of Bemisia tabaci Genn. (Stern., Aleyrodidae) on cotton in the Sudan Gezira

2009 ◽  
Vol 96 (1-5) ◽  
pp. 341-363 ◽  
Author(s):  
R. Arx ◽  
J. Baumgärtner ◽  
V. Delucchi
Keyword(s):  
Population Dynamics ◽  
Bemisia Tabaci ◽  
Sudan Gezira

scholarly journals Inter-seasonal population dynamics and pest status of Bemisia tabaci (Gennadius) biotype B in an Australian cropping system

2008 ◽  
Vol 99 (4) ◽  
pp. 325-335 ◽  
Author(s):  
R.V. Sequeira ◽  
A. Shields ◽  
A. Moore ◽  
P. De Barro
Keyword(s):  
Population Dynamics ◽  
Bemisia Tabaci ◽  
Cropping System ◽  
Late Summer ◽  
System Component ◽  
Cotton Production ◽  
Pest Status ◽  
Weed Host ◽  
Biotype B ◽  
Seasonal Population

AbstractBemisia tabaci, biotype B, commonly known as the silverleaf whitefly (SLW) is an alien species that invaded Australia in the mid-90s. This paper reports on the invasion ecology of SLW and the factors that are likely to have contributed to the first outbreak of this major pest in an Australian cotton cropping system. Population dynamics of SLW within whitefly-susceptible crop (cotton and cucurbit) and non-crop vegetation (sowthistle, Sonchus spp.) components of the cropping system were investigated over four consecutive growing seasons (September–June) 2001/02–2004/05 in the Emerald Irrigation Area (EIA) of Queensland, Australia. Based on fixed geo-referenced sampling sites, variation in spatial and temporal abundance of SLW within each system component was quantified to provide baseline data for the development of ecologically sustainable pest management strategies. Parasitism of large (3rd and 4th instars) SLW nymphs by native aphelinid wasps was quantified to determine the potential for natural control of SLW populations. Following the initial outbreak in 2001/02, SLW abundance declined and stabilised over the next three seasons. The population dynamics of SLW is characterised by inter-seasonal population cycling between the non-crop (weed) and cotton components of the EIA cropping system. Cotton was the largest sink for and source of SLW during the study period. Over-wintering populations dispersed from weed host plant sources to cotton in spring followed by a reverse dispersal in late summer and autumn to broad-leaved crops and weeds. A basic spatial source-sink analysis showed that SLW adult and nymph densities were higher in cotton fields that were closer to over-wintering weed sources throughout spring than in fields that were further away. Cucurbit fields were not significant sources of SLW and did not appear to contribute significantly to the regional population dynamics of the pest. Substantial parasitism of nymphal stages throughout the study period indicates that native parasitoid species and other natural enemies are important sources of SLW mortality in Australian cotton production systems. Weather conditions and use of broad-spectrum insecticides for pest control are implicated in the initial outbreak and on-going pest status of SLW in the region.

Influence of Endosulfan on Bemisia tabaci (Homoptera: Aleyrodidae) Populations, Parasitism, and Lettuce Infectious Yellows Virus in Late-Summer Planted Cantaloupe

1995 ◽  
Vol 30 (1) ◽  
pp. 49-61 ◽  
Author(s):  
Gregg S. Nuessly ◽  
Thomas M. Perring
Keyword(s):  
Population Dynamics ◽  
Sweet Potato ◽  
Bemisia Tabaci ◽  
Cucumis Melo ◽  
Control Strategies ◽  
Late Summer ◽  
Mold Growth ◽  
Sooty Mold ◽  
Lettuce Infectious Yellows Virus ◽  
Cucumis Melo L

Studies were conducted to evaluate the effectiveness of endosulfan in reducing the incidence of lettuce infectious yellows virus (LIYV) in late-summer planted cantaloupe, Cucumis melo L., through reduction of sweet potato whitefly, Bemisia tabaci (Gennadius), densities. Counts of B. tabaci adults and immatures and of a native parasitoid of B. tabaci, Eretmocerus sp. near californicus Howard (Hymenoptera: Aphelinidae) were lower in treated plots than those in untreated plots for the duration of the trial. Despite lower populations of B. tabaci, LIYV was not significantly different between treatments, reaching 48% in treated and 40% in untreated plots. B. tabaci emigrated out of treated plots which may have contributed to the spread of LIYV. Sooty mold growth on fruit contaminated with B. tabaci-produced honeydew was present on only 0.4% of the melons in treated plots, but on 29% of the melons in the untreated plots. B. tabaci population dynamics on cantaloupe is discussed with regard to control strategies and LIYV epidemiology.

Population Dynamics, Demography, Dispersal and Spread of Bemisia tabaci

2009 ◽  
pp. 185-226 ◽  
Author(s):  
Steven E. Naranjo ◽  
Steven J. Castle ◽  
Paul J. De Barro ◽  
Shu-Sheng Liu
Keyword(s):  
Population Dynamics ◽  
Bemisia Tabaci

Population dynamics of Bemisia tabaci in okra

2018 ◽  
Vol 80 (3) ◽  
pp. 605
Author(s):  
Rakesh Kumar ◽  
R. K. Sharma ◽  
S. R. Sinha ◽  
Kirti Sharma
Keyword(s):  
Population Dynamics ◽  
Bemisia Tabaci

SWEETPOTATO WHITEFLY BEMISIA TABACI (GENNADIUS) (HOMOPTERA: ALEYRODIDAE), A POTENTIAL INSECT PEST IN CANADA

1989 ◽  
Vol 121 (11) ◽  
pp. 1027-1028 ◽  
Author(s):  
A.B. Broadbent ◽  
R.G. Foottit ◽  
G.D. Murphy
Keyword(s):  
United States ◽  
Population Dynamics ◽  
Plant Species ◽  
Bemisia Tabaci ◽  
Insect Pest ◽  
The United States ◽  
Euphorbia Pulcherrima ◽  
Sweetpotato Whitefly

The sweetpotato whitefly, Bemisia tabaci (Gennadius), was accidentally imported into Canada on poinsettia, Euphorbia pulcherrima Willd., cuttings from the United States in 1987 and in 1988. The biology and population dynamics of B. tabaci were reviewed by Butler et al. (1986). It is a worldwide pest of more than 500 plant species in 74 families. Prior to 1986, there was only one report of this insect as a greenhouse pest, on vegetables in Turkey (Lopez-Avila and Cock 1986). Bemisia tabaci was first reported on poinsettia in Florida greenhouses in November 1986 (Price et al. 1987). In 1987, this insect was reported as a pest on field tomatoes in Florida (Schuster and Price 1987).

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