Persistence and migration of <i>Chortoicetes terminifera</i> (Walker) (Orthoptera: Acrididae) in Australia

Symmons, P. M.; McCulloch, L.

doi:10.1017/s0007485300007446

Cited by 15 publications

(16 citation statements)

References 4 publications

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“…(5) Meteorological conditions for migration The method used to estimate the likely occurrence, direction and distance of night migration, based on meteorological data alone, followed that described by Wright (1983). This method combines data from Farrow (1975) with the displacement index (DI) of Symmons and McCulloch (1980) and has been used in conjunction with the daily surface and upper level meteorological charts to plot trajectories to determine likely source or invasion areas. Essentially locust displacement is calculated by multiplying the wind direction and speed at 850 (a) 1934 Plague hPa by the number of hours after sunset when the temperature exceeds 20°C, with a maximum of 9 h displacement.…”

Section: Simulation Modelmentioning

confidence: 99%

Analysis of the development of major plagues of the Australian plague locust Chortoicetes terminifera (Walker) using a simulation model

Wright

1987

Australian Journal of Ecology

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The development and decline of all the past major plagues of Chortoicetes terminifera in Australia has been analysed using all available locust data and a simulation model to estimate the course of events for periods when few locusts were reported. The model is based on the developmental biology of the locust and tnchides methods of estimating the duration of egg. nymphal and adult development and uses a pasture growth index and potential night displacement index to assess likely survival and migration.The analysis shows that five ofthe six plagues originated in the arid interior, where good spring and summer rain allowed two or three consecutive generations of successful breeding, before emigration to the agricuhural country occurred in the late summer or early autumn. This is contrary to the idea held previously that most plagues developed from local bi'eeding in established outbreak areas in the agricultural belt. The applications of these results, to improve population monitoring and control strategy' by suggesting the best timing for surveys and when control would have most effect, are discussed.

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Section: Simulation Modelmentioning

confidence: 99%

Analysis of the development of major plagues of the Australian plague locust Chortoicetes terminifera (Walker) using a simulation model

Wright

1987

Australian Journal of Ecology

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“…In common with other locust species, its outbreaks are characterized by rapid population increase and mass migration, the latter leading to the geographical expansion of infestations (Key 1938, 1942, 1943; Symmons & Wright 1981; Wright 1987; Wright & Symmons 1987). Nocturnal mass migration is a common response in fledged, prereproductive C. terminifera populations after a period of fat accumulation, but migratory ability may be limited if food is inadequate (Symmons & McCulloch 1980; Hunter et al . 1981; Hunter 1982).…”

Section: Introductionmentioning

confidence: 99%

“…This species is widespread in the inland part of the continent south of 20°S (Key 1954), and its southward migrations are well known (Davidson 1936; Key 1943; Farrow 1975, 1977; Symmons & McCulloch 1980). In particular, dramatic invasions of agricultural areas of New South Wales (NSW), South Australia (SA) and Victoria in late summer and autumn have characterized several plague infestations (Symmons & Wright 1981; Bryceson & Wright 1986; Wright 1987).…”

Section: Introductionmentioning

confidence: 99%

“…In particular, dramatic invasions of agricultural areas of New South Wales (NSW), South Australia (SA) and Victoria in late summer and autumn have characterized several plague infestations (Symmons & Wright 1981; Bryceson & Wright 1986; Wright 1987). Overnight migrations up to 500 km (Symmons & McCulloch 1980; Symmons & Wright 1981; Wright & Symmons 1987) occur at these times and total displacements of over 1500 km over several consecutive nights have been inferred (Wright 1986).…”

Section: Introductionmentioning

confidence: 99%

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Evidence from traditional and new technologies for northward migrations of Australian plague locusts (Chortoicetes terminifera) (Walker) (Orthoptera: Acrididae) to western Queensland

Deveson¹,

Drake

Hunter³

et al. 2005

Austral Ecology

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The development of recent infestations of the Australian plague locust ( Chortoicetes terminifera ) (Walker) (Orthoptera: Acrididae) has been traced using traditional survey data combined with information from several modern technologies including simulation of windborne transport trajectories, direct observation with entomological radar and satellite imagery. The results indicate that migration from spring generations in the southern and eastern parts of the species range, including agricultural areas, to the summer rainfall areas in arid western Queensland (Qld) has contributed to the development of infestations on several occasions. Migration from swarm populations in New South Wales to western Qld in November and December 1999 contributed to a rapid population increase that, over a sequence of generations, led to the major infestation of agricultural areas in March and April 2000. There is evidence that northward migrations also occurred in 1995, 1997 and 2000. These contributed to the early summer populations in Qld, but did not result in large migrations to the south in autumn. These observations suggest that a pattern of exchange migration across much of the geographical range of the species between regions of winter and summer rainfall characterizes the spatial dynamics of this species. This pattern appears to be adaptive and suggests migration in C. terminifera is sustained by contemporary natural selection.

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“…Monitor ing for rainfall and ecological conditions suitable for the building up of populations was initially carried out by aerial surveys but is now increasingly done by satellite imagery. Such a method has been applied with considerable success in Australia for monitoring of the dynamics of Chortoicetes ter minifera (17,43), where the all-important phenology of the locust's food plants is discernible from satellite imagery.…”

Section: Past and Present Trends In Research And Development Of Acridmentioning

confidence: 99%

Sir Boris Uvarov (1889-1970): The Father Of Acridology

Waloff¹

1990

Annual Review of Entomology

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Persistence and migration of Chortoicetes terminifera (Walker) (Orthoptera: Acrididae) in Australia

Cited by 15 publications

References 4 publications

Analysis of the development of major plagues of the Australian plague locust Chortoicetes terminifera (Walker) using a simulation model

Analysis of the development of major plagues of the Australian plague locust Chortoicetes terminifera (Walker) using a simulation model

Evidence from traditional and new technologies for northward migrations of Australian plague locusts (Chortoicetes terminifera) (Walker) (Orthoptera: Acrididae) to western Queensland

Sir Boris Uvarov (1889-1970): The Father Of Acridology

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