Book contents
- Frontmatter
- Contents
- Contributors
- Preface
- Part one Insect migration in relation to weather and climate
- 1 Long-range insect migration in relation to climate and weather: Africa and Europe
- 2 Insect migration in North America: synoptic-scale transport in a highly seasonal environment
- 3 Migration of the Brown Planthopper Nilaparvata lugens and the White-backed Planthopper Sogatella furcifera in East Asia: the role of weather and climate
- 4 Migration of the Oriental Armyworm Mythimna separata in East Asia in relation to weather and climate. I. Northeastern China
- 5 Migration of the Oriental Armyworm Mythimna separata in East Asia in relation to weather and climate. II. Korea
- 6 Migration of the Oriental Armyworm Mythimna separata in East Asia in relation to weather and climate. III. Japan
- 7 Insect migration in an arid continent. I. The Common Armyworm Mythimna convecta in eastern Australia
- 8 Insect migration in an arid continent. II. Helicoverpa spp. in eastern Australia
- 9 Insect migration in an arid continent. III. The Australian Plague Locust Chortoicetes terminifera and the Native Budworm Helicoverpa punctigera in Western Australia
- Part two Adaptations for migration
- Part three Forecasting migrant pests
- Part four Overview and synthesis
- Index
9 - Insect migration in an arid continent. III. The Australian Plague Locust Chortoicetes terminifera and the Native Budworm Helicoverpa punctigera in Western Australia
Published online by Cambridge University Press: 04 November 2009
- Frontmatter
- Contents
- Contributors
- Preface
- Part one Insect migration in relation to weather and climate
- 1 Long-range insect migration in relation to climate and weather: Africa and Europe
- 2 Insect migration in North America: synoptic-scale transport in a highly seasonal environment
- 3 Migration of the Brown Planthopper Nilaparvata lugens and the White-backed Planthopper Sogatella furcifera in East Asia: the role of weather and climate
- 4 Migration of the Oriental Armyworm Mythimna separata in East Asia in relation to weather and climate. I. Northeastern China
- 5 Migration of the Oriental Armyworm Mythimna separata in East Asia in relation to weather and climate. II. Korea
- 6 Migration of the Oriental Armyworm Mythimna separata in East Asia in relation to weather and climate. III. Japan
- 7 Insect migration in an arid continent. I. The Common Armyworm Mythimna convecta in eastern Australia
- 8 Insect migration in an arid continent. II. Helicoverpa spp. in eastern Australia
- 9 Insect migration in an arid continent. III. The Australian Plague Locust Chortoicetes terminifera and the Native Budworm Helicoverpa punctigera in Western Australia
- Part two Adaptations for migration
- Part three Forecasting migrant pests
- Part four Overview and synthesis
- Index
Summary
Western Australia: an environment for migration?
The state of Western Australia (WA) occupies approximately one-third of the Australian continent. It consists principally of a gently undulating plateau 300–600 m above sea level; there are no outstanding mountain ranges. Three broad climatic zones are recognised (Fig. 9.1): a tropical region in the north, with 90% of annual rainfall (500–1200 mm) falling between November and March (summer); a Mediterranean region in the southwest with 80% of annual rainfall (400–1200 mm) falling between April and September (autumn, winter and early spring); and an arid (desert and semidesert) zone, occupying the great majority of the state's land area, in which rainfall averages less than 300 mm per year. Cropping is almost completely confined to the Mediterranean region, and occurs principally in a broad band towards its boundary with the arid zone. Within the vast arid zone, rainfall occurs mainly during summer in the north, during both summer and winter in the centre, and during winter in the southwest. It is non-seasonal in the southeast (Fig. 9.1b). Rain usually falls on only a few days each year and drought conditions can persist for months or even several years. Temperatures are generally high, with mean monthly maxima exceeding 37 °C in the hottest 3–5 months. Average annual evaporation is more than ten times the rainfall.
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- Insect MigrationTracking Resources through Space and Time, pp. 173 - 190Publisher: Cambridge University PressPrint publication year: 1995
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