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RESEARCH ARTICLE

Managing ecosystem services in broadacre landscapes: what are the appropriate spatial scales?

Nancy A. Schellhorn A E , Sarina Macfadyen B , Felix J. J. A. Bianchi A , David G. Williams C and Myron P. Zalucki D
+ Author Affiliations
- Author Affiliations

A CSIRO Entomology, Indooroopilly, Qld 4068, Australia.

B CSIRO Entomology, Canberra, ACT 2601, Australia.

C Department of Primary Industries, Vic. 3616, Australia.

D University of Queensland, St Lucia, Qld 4072, Australia.

E Corresponding author. Email: Nancy.schellhorn@csiro.au

Australian Journal of Experimental Agriculture 48(12) 1549-1559 https://doi.org/10.1071/EA08112
Submitted: 3 April 2008  Accepted: 12 September 2008   Published: 6 November 2008

Abstract

Over the past 200 years agriculture has expanded throughout Australia. The culmination of clearing and cultivating land at the farm scale has resulted in highly modified landscapes and a perceived loss of ecosystem services from pest control and pollination. We examine the literature: (i) to identify the appropriate spatial scale for managing pests, natural enemies and pollinators; and (ii) for evidence that farm-scale changes (due to agricultural intensification) across a landscape have resulted in a tipping point favouring pests and hindering pollinators. Although there is limited information to draw firm conclusions, the evidence suggests that actions undertaken on individual farms have an impact both on their neighbours and regionally, and that the culmination of these actions can lead to changes in population dynamics of pests, natural enemies and pollinators. For major pest species, there is reasonable evidence that grain growers may benefit from improved management and higher yields by implementing area-wide pest management strategies on a landscape scale in collaboration with growers of other crops that also share these pests. As yet, for natural enemies and pollinators there is little direct evidence that similar area-wide initiatives will have a greater effect than management strategies aimed at the field and farm level. Managing pests, natural enemies and pollinators beyond the scale of the field or farm is technically and socially challenging and will required a well defined research agenda, as well as compromise, balance and trading among stakeholders. We highlight critical knowledge gaps and suggest approaches for designing and managing landscapes for ecosystem services.


Acknowledgements

We thank Paul Umina and Gary Fitt for inviting us to write this paper as part of the special feature of the Grains Research and Development Corporation funded National Invertebrate Pest Initiative. We also thank Lionel Hill, Department of Primary Industries and Water for data provided on DBM light trap catches in Tasmania. We acknowledge the Cotton, Communities, Catchment CRC and Land and Water Australia for funding for F. J. J. A. Bianchi.


References


Australian Bureau of Statistics (ABS) (2007) Year book Australia, 2007. Available at www.abs.gov.au [Verified 10 October 2008]

Baggen LR, Gurr GM (1998) The influence of food on Copidosoma koehleri (Hymenoptera: Encyrtidae), and the use of flowering plants as a habitat management tool to enhance biological control of potato moth, Phthorimaea operculella (Lepidoptera: Gelechiidae). Biological Control 11, 9–17.
Crossref | GoogleScholarGoogle Scholar | open url image1

Banzhaf S , Boyd J (2005) ‘The architecture and measurement of an ecosystem service index.’ Discussion Paper 05-22. (Resources for the future: Washington DC)

Bell MR, Hayes JL (1994) Area-wide management of cotton bollworm and tobacco budworm (Lepidoptera, Noctuidae) through application of a nuclear polyhedrosis virus on early-season alternate hosts. Journal of Economic Entomology 87, 53–57. open url image1

Benton TG, Vickery JA, Wilson JD (2003) Farmland biodiversity: is habitat heterogeneity the key? Trends in Ecology & Evolution 18, 182–188.
Crossref | GoogleScholarGoogle Scholar | open url image1

Bianchi FJJA, van der Werf W (2003) The effect of the area and configuration of hibernation sites on the control of aphids by Coccinella septempunctata (Coleoptera: Coccinellidae) in agricultural landscapes: a simulation study. Environmental Entomology 32, 1290–1304. open url image1

Bianchi FJJA, van der Werf W (2004) Model evaluation of the function of prey in non-crop habitats for biological control by ladybeetles in agricultural landscapes. Ecological Modelling 171, 177–193.
Crossref | GoogleScholarGoogle Scholar | open url image1

Bianchi FJJA, Booij CJH, Tscharntke T (2006) Sustainable pest regulation in agricultural landscapes: a review on landscape composition, biodiversity and natural pest control. Proceedings of the Royal Society B: Biological Sciences 273, 1715–1727.
CAS | Crossref |
open url image1

Bianchi FJJA, Honĕk AH, van der Werf W (2007) Changes in agricultural land use can explain population decline in a ladybeetle species in the Czech Republic: evidence from a process-based spatially explicit model. Landscape Ecology 22, 1541–1554.
Crossref | GoogleScholarGoogle Scholar | open url image1

Biesmeijer JC, Roberts SPM, Reemer M, Ohlemuller R, Edwards M , et al. (2006) Parallel declines in pollinators and insect-pollinated plants in Britain and the Netherlands. Science 313, 351–354.
Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | open url image1

Blanche K, Ludwig JA, Cunningham SA (2006) Proximity to rainforest enhances pollination and fruit set in orchards. Journal of Applied Ecology 43, 1182–1187.
Crossref | GoogleScholarGoogle Scholar | open url image1

Brennan A (2004) Biodiversity and agricultural landscapes: can the wicked policy problems be solved? Pacific Conservation Biology 10, 124–142. open url image1

Brewster CC, Allen JC, Kopp DD (1999) IPM from space: using satellite imagery to construct regional crop maps for studying crop-insect interactions. American Entomologist 45, 105–117. open url image1

Byers JA, Castle SJ (2005) Area-wide models comparing synchronous versus asynchronous treatments for control of dispersing insect pests. Journal of Economic Entomology 98, 1763–1773.
PubMed |
open url image1

Carvell C, Meek W, Pywell RF, Goulson D, Nowakowski M (2007) Comparing the efficacy of agri-environment schemes to enhance bumble bee abundance and diversity on arable field margins. Journal of Applied Ecology 44, 29–40.
Crossref | GoogleScholarGoogle Scholar | open url image1

Chacoff NP, Aizen MA (2006) Edge effects on flower-visiting insects in grapefruit plantations bordering premontane subtropical forest. Journal of Applied Ecology 43, 18–27.
Crossref | GoogleScholarGoogle Scholar | open url image1

Chapman JW, Reynolds DR, Smith AD, Riley JR, Pedgley DE, Woiwood IP (2002) High-altitude migration of the diamondback moth Plutella xylostella in the UK: a study using radar, aerial netting and ground trapping. Ecological Entomology 27, 641–650.
Crossref | GoogleScholarGoogle Scholar | open url image1

Chapman JW, Reynolds DR, Brooks SJ, Smith AD, Woiwod IP (2006) Seasonal variation in the migration strategies of the green lacewing Chrysoperla carnea species complex. Ecological Entomology 31, 378–388.
Crossref | GoogleScholarGoogle Scholar | open url image1

Clark LR (1950) On the abundance of the Australian plague locust, Chortoicetes terminifera (Walker) in relation to trees. Australian Journal of Agricultural Research 1, 64–75.
Crossref | GoogleScholarGoogle Scholar | open url image1

Common IFB (1953) Australian species of Heliothis (Lepidoptera: Noctuidae) and their pest status. Australian Journal of Zoology 1, 319–344.
Crossref | GoogleScholarGoogle Scholar | open url image1

Cook DC, Thomas MB, Cunningham SA, Anderson DL, De Barro PJ (2007) Predicting the economic impact of an invasive species on an ecosystem service. Ecological Applications 17, 1832–1840.
Crossref | GoogleScholarGoogle Scholar | PubMed | open url image1

Corbett A, Plant RE (1993) Role of movement in the response of enemies to agroecosystem diversification: a theoretical evaluation. Environmental Entomology 22, 519–531. open url image1

Costanza R, d’Arge R, de Groot R, Farber S, Grasso M , et al. (1997) The value of the world’s ecosystem services and natural capital. Nature 387, 253–260.
Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Cunningham SA, FitzGibbon F, Heard TA (2002) The future of pollinators for Australian agriculture. Australian Journal of Agricultural Research 53, 893–900.
Crossref | GoogleScholarGoogle Scholar | open url image1

Dennis P, Fry GLA (1992) Field margins: can they enhance natural enemy population densities and general arthropod diversity on farmland? Agriculture Ecosystems & Environment 40, 95–115.
Crossref | GoogleScholarGoogle Scholar | open url image1

Farrow RA, Daly JC (1987) Long range movement as an adaptive strategy in the genus Heliothis (Lepidoptera: Noctuidae): a review of its occurrence and detection in four pest species. Australian Journal of Zoology 35, 1–24.
Crossref | GoogleScholarGoogle Scholar | open url image1

Fitt GP, Daly JC (1990) Abundance of overwintering pupae and the spring generation of Helicoverpa spp. (Lepidoptera: Noctuidae) in northern New South Wales, Australia: implications for pest management. Journal of Economic Entomology 83, 1827–1836. open url image1

Fitt GP, Zalucki MP, Twine PH (1989) Temporal and spatial patterns in pheromone-trap catches of Helicoverpa spp. (Lepidoptera: Noctuidae) in cotton-growing areas of Australia. Bulletin of Entomological Research 79, 145–161. open url image1

Furlong MJ, Shi Z-H, Liu Y-Q, Guo S-J, Lu Y-B, Liu S-S, Zalucki MP (2004a) Experimental analysis of the influence of pest management practice on the efficacy of an endemic arthropod natural enemy complex of the diamondback moth. Journal of Economic Entomology 97, 1814–1827.
PubMed |
open url image1

Furlong MJ, Shi Z-H, Liu S-S, Zalucki MP (2004b) Evaluation of the impact of natural enemies on Plutella xylostella L. (Lepidoptera: Yponomeutidae) populations on commercial Brassica farms. Agricultural and Forest Entomology 6, 311–322.
Crossref | GoogleScholarGoogle Scholar | open url image1

Furlong MJ, Spafford H, Ridland PM, Endersby NM, Edwards OR, Baker GJ, Keller MA, Paull CA (2008) Ecology of diamondback moth in Australian canola: landscape perspectives and the implications for management. Australian Journal of Experimental Agriculture 48, 1494–1505.
Crossref | GoogleScholarGoogle Scholar | open url image1

Ghazoul J (2005) Buzziness as usual? Questioning the global pollination crisis. Trends in Ecology & Evolution 20, 367–373.
Crossref | GoogleScholarGoogle Scholar | open url image1

Gregg PC , Fitt GP , Zalucki MP , Murray DAH (1995) Insect migration in an arid continent: Helicoverpa in eastern Australia. In ‘Insect migration: tracking resources through space and time’. (Eds VA Drake, AG Gatehouse) pp. 151–172. (Press Syndicate of the University of Cambridge: Cambridge)

Grodzins M (1957) Metropolitan segregation. Scientific American 197, 33–41. open url image1

Halley JM, Dempster JP (1996) The spatial population dynamics of insects exploiting a patchy food resource: a model study of local persistence. Journal of Applied Ecology 33, 439–454.
Crossref | GoogleScholarGoogle Scholar | open url image1

Hayter KE, Cresswell JE (2006) The influence of pollinator abundance on the dynamics and efficiency of pollination in agricultural Brassica napus: implications for landscape-scale gene dispersal. Journal of Applied Ecology 43, 1196–1202.
Crossref | GoogleScholarGoogle Scholar | open url image1

Heard MS, Carvell C, Carreck NL, Rothery P, Osborne JL, Bourke AFG (2007) Landscape context not patch size determines bumble-bee density on flower mixtures sown for agri-environment schemes. Biology Letters 3, 638–641.
Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | open url image1

Heard T (2001) Stingless bees and crop pollination. Bee World 82, 110–112. open url image1

Hendrickx F, Maelfait JP, Van Wingerden W, Schweiger O, Speelmans M , et al. (2007) How landscape structure, land-use intensity and habitat diversity affect components of total arthropod diversity in agricultural landscapes. Journal of Applied Ecology 44, 340–351.
Crossref | GoogleScholarGoogle Scholar | open url image1

Hobbs RJ , Saunders DA (1994) Effects of landscape fragmentation in agricultural areas. In ‘Conservation biology in Australia and Oceania’. (Eds C Moritz, J Kikkawa) pp. 77–95. (Surrey Beatty & Sons: Chipping Norton, NSW)

Ives AR, Settle WH (1997) Metapopulation dynamics and pest control in agricultural systems. American Naturalist 149, 220–246.
Crossref | GoogleScholarGoogle Scholar | open url image1

Johnson ML , Pearce S , Wade M , Davies A , Silberbauer L , Gregg P , Zalucki MP (2000) A review of beneficials in Australian cotton framing systems. Report for the Cotton Research and Development Corporation, Narrabri, New South Wales.

Kaine G , Bewsell D (2002) Approaches and partnerships for sustainable extension and rural development. In ‘AIAEE 2002. Proceedings of the 18th annual conference, Durban, South Africa’. (Eds JR Linder, GJ Wingenbach, JE Christiansen) pp. 174–179. (Association for International Agricultural and Extension Education: College Station, TX)

Kaine G, Bewsell D, Boland A, Linehan C (2005) Using market research to understand the adoption of irrigation management strategies in the pome and stone fruit industry. Australian Journal of Experimental Agriculture 45, 1181–1187.
Crossref | GoogleScholarGoogle Scholar | open url image1

Kirkpatrick TH (1961) Queensland distributions and host records for Heliothis species (Lepidoptera: Noctuidae). Queensland Journal of Agricultural Science 18, 195–202. open url image1

Knipling EF, Stadelbacher EA (1983) The rationale for area-wide management of Heliothis (Lepidoptera: Noctuidae) population. Bulletin of the Entomological Society of America 29, 29–37. open url image1

Knox OGG, Constable GA, Pyke B, Gupta VVSR (2006) Environmental impact of conventional and Bt insecticidal cotton expressing one and two Cry genes in Australia. Australian Journal of Agricultural Research 57, 501–509.
Crossref | GoogleScholarGoogle Scholar | open url image1

Kremen C, Ricketts T (2000) Global perspectives on pollination disruptions. Conservation Biology 14, 1226–1228.
Crossref | GoogleScholarGoogle Scholar | open url image1

Kremen C, Williams NM, Thorp RW (2002) Crop pollination from native bees at risk from agricultural intensification. Proceedings of the National Academy of Sciences of the United States of America 99, 16812–16816.
Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | open url image1

Kremen C, Williams NM, Bugg RL, Fay JP, Thorp RW (2004) The area requirements of an ecosystem service: crop pollination by native bee communities in California. Ecology Letters 7, 1109–1119.
Crossref | GoogleScholarGoogle Scholar | open url image1

Legaspi BC, Allen JC, Brewster CC, Morales-Ramos JA, King EG (1998) Area-wide management of the cotton boll weevil: use of a spatio-temporal model in augmentative biological control. Ecological Modelling 110, 151–164.
Crossref | GoogleScholarGoogle Scholar | open url image1

Levins R (1969) Some demographic and genetic consequences of environmental heterogeneity for biological control. Bulletin of the Entomological Society of America 15, 237–240. open url image1

Liu S-S, Li Y-H, Liu Y-Q, Zalucki MP (2005) Experience-induced preference for oviposition repellents derived from a non-host plant by a specialist herbivore. Ecology Letters 8, 722–729.
Crossref | GoogleScholarGoogle Scholar | open url image1

Maelzer DA, Zalucki MP (1999) Analysis and interpretation of long-term light trap data for Helicoverpa spp. (Lepidoptera: Noctuidae) in Australia: the effect of climate and crop host plants. Bulletin of Entomological Research 89, 455–464.
Crossref | GoogleScholarGoogle Scholar | open url image1

Manning R, Boland JA (2000) Preliminary investigation into honey bee (Apis mellifera) pollination of canola (Brassica napus cv. Karoo) in Western Australia. Australian Journal of Experimental Agriculture 40, 439–442.
Crossref | GoogleScholarGoogle Scholar | open url image1

Mansfield S, Dillon ML, Whitehouse MEA (2006) Are arthropod communities in cotton really disrupted? An assessment of insecticide regimes and evaluation of the beneficial index. Agriculture Ecosystems & Environment 113, 326–335.
Crossref | GoogleScholarGoogle Scholar | CAS | open url image1

Matthews M (1999) ‘Heliothine moths of Australia. Monographs on Australian Lepidoptera. Vol. 7.’ (CSIRO Publishing: Melbourne) 320 pp.

Mo JH, Baker G, Keller M, Roush R (2003) Local dispersal of the diamondback moth [Plutella xylostella (L.)] (Lepidoptera: Plutellidae). Environmental Entomology 32, 71–79. open url image1

Murray DAH , Miles MM , McLennan AJ , Lloyd RJ , Hopkinson JE (2005) Area-wide management of Helicoverpa spp. in an Australian mixed cropping agroecosystem. In ‘Beltwide cotton conferences, New Orleans, Louisiana, January 4–7 2005’. (Eds P Dugger, D Richter) pp. 1246–1251. (National Cotton Council: Cordova, TN)

Ohnesorge B, Schier A (1989) Regional differences in population dynamics of cereal aphids and their bearing on short-term forecasting. Mededelingen van de Faculteit Landbouwwetenschappen Rijksuniversiteit Gent 54, 747–752. open url image1

Passlow T (1986) Keynote address. In ‘Heliothis workshop 1985 proceedings. QDPI Brisbane, Australia. Conference and workshop series QC86004’. (Eds MP Zalucki, PH Twine) pp. 5–8. (DPI Qld: Brisbane)

Paton DC (2000) Disruption of bird-plant pollination systems in southern Australia. Conservation Biology 14, 1232–1234.
Crossref | GoogleScholarGoogle Scholar | open url image1

Potting RPJ, Perry JN, Powell W (2005) Insect behavioural ecology and other factors affecting the control efficacy of agro-ecosystern diversification strategies. Ecological Modelling 182, 199–216.
Crossref | GoogleScholarGoogle Scholar | open url image1

Pywell RF, Warman EA, Hulmes L, Hulmes S, Nuttall P, Sparks TH, Critchley CNR, Sherwood A (2006) Effectiveness of new agri-environment schemes in providing foraging resources for bumblebees in intensively farmed landscapes. Biological Conservation 129, 192–206.
Crossref | GoogleScholarGoogle Scholar | open url image1

Rencken IC (2006) An investigation of the importance of native and non-crop vegetation in beneficial generalist predators in Australian cotton agroecosystems. PhD Thesis, University of New England, Armidale, Australia.

Rochester WA , Zalucki MP (1998) Measuring the impacts of Helicoverpa armigera migration on pest management during summer and autumn. In ‘Pest management – future challenges. Proceedings of the VI AAERC. Vol. 2’. (Eds MP Zalucki, RAI Drew, and G White) pp. 94–98. (University of Queensland Printery: St Lucia)

Rochester WA, Zalucki MP, Ward A, Miles M, Murray DAH (2002) Testing insect movement theory: empirical analysis of pest data routinely collected from agricultural crops. Computers and Electronics in Agriculture 35, 139–149.
Crossref | GoogleScholarGoogle Scholar | open url image1

Roschewitz I, Gabriel D, Tscharntke T, Thies C (2005) The effects of landscape complexity on arable weed species diversity in organic and conventional farming. Journal of Applied Ecology 42, 873–882.
Crossref | GoogleScholarGoogle Scholar | open url image1

Rundlöf M, Nilsson H, Smith HG (2008) Interacting effects of farming practice and landscape context on bumble bees. Biological Conservation 141, 417–426. open url image1

Sand DPA , New TR (2002) ‘The action plan for Australian butterflies.’ (Environment Australia: Canberra)

Schellhorn N , Lawrence L (2008) The role of landscape in area-wide management of silverleaf whitefly. Northern Australia Focus. Australian Grain (July–August), vi–vii.

Schellhorn NA , Silberbauer LX (2002) The role of surrounding vegetation and refuges: increasing the effectiveness of natural enemies in cotton and broccoli systems. In ‘Proceedings for the 1st international symposium on the biological control of Arthropods’. (Ed. R van Driesche) pp. 235–243. (USDA Forest Service: Morgantown, WV)

Schellhorn NA , Maratos L , Bellati J (2004) Property to property movement. In ‘Implementing pest management of diamondback moth’. Final Report # VG 00055. (Ed. G Baker) pp. 44–49. (Horticulture Australia Limited: Sydney)

Schellhorn NA, Bellati J, Paull CP, Maratos L (2008) Parasitoid and moth movement from refuge to crop. Basic and Applied Ecology 9, 691–700.
Crossref |
open url image1

Schulze ED , Gerstberger P (1993) Functional aspects of landscape diversity: a Bavarian example. In ‘Biodiversity and ecosystem function’. (Eds ED Schulze, HA Mooney) pp. 454–466. (Springer: Berlin)

Schweiger O, Maelfait JP, van Wingerden W, Hendrickx F, Billeter R , et al. (2005) Quantifying the impact of environmental factors on arthropod communities in agricultural landscapes across organizational levels and spatial scales. Journal of Applied Ecology 42, 1129–1139.
Crossref | GoogleScholarGoogle Scholar | open url image1

Scott KD, Lawrence N, Lange CL, Scott LJ, Wilkinson KS, Merritt MA, Miles M, Murray D, Graham GC (2005a) Assessing moth migration and population structuring in the Cotton bollworm Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) at the regional scale: example from the Darling Downs, Australia. Journal of Economic Entomology 98, 2210–2219.
PubMed |
open url image1

Scott KD, Wilkinson KS, Lawrence N, Lange CL, Scott LJ, Merritt MA, Lowe AJ, Graham GC (2005b) Gene-flow between populations of cotton bollworm Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) is highly variable between years. Bulletin of Entomological Research 95, 381–392.
Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | open url image1

Silberbauer L, Yee M, Del Socorro A, Wratten S, Gregg P, Bowie M (2004) Pollen grains as markers to track the movements of generalist predatory insects in agroecosystems. International Journal of Pest Management 50, 165–171.
Crossref | GoogleScholarGoogle Scholar | open url image1

Stephens CJ, Schellhorn NA, Wood GM, Austin AD (2006) Parasitic wasp assemblages associated with native and weedy plant species in an agricultural landscape. Australian Journal of Entomology 45, 176–184.
Crossref | GoogleScholarGoogle Scholar | open url image1

Summerville KS (2004) Do smaller forest fragments contain a greater abundance of lepidopteran crop and forage consumers? Environmental Entomology 33, 234–241. open url image1

Talekar NS, Shelton AM (1993) Biology, ecology, and management of the diamondback moth. Annual Review of Entomology 38, 275–301.
Crossref | GoogleScholarGoogle Scholar | open url image1

Thorbek P, Topping CJ (2005) The influence of landscape diversity and heterogeneity on spatial dynamics of agrobiont linyphiid spiders: an individual-based model. BioControl 50, 1–33.
Crossref | GoogleScholarGoogle Scholar | open url image1

Titmarsh IJ (1993) Population dynamics of Heliothis sp. – factors affecting the survival of immature stages. PhD Thesis, The University of Queensland, Brisbane.

Turner MG , Gardner RH (1991) Quantitative methods in landscape ecology: an introduction. In ‘Quantitative methods in landscape ecology’. (Eds MG Turner, RH Gardner) pp. 3–14. (Springer-Verlag: New York)

Tylianakis JM, Didham RK, Wratten SD (2004) Improved fitness of aphid parasitoids receiving resource subsidies. Ecology 85, 658–666.
Crossref | GoogleScholarGoogle Scholar | open url image1

Vargas RI, Long J, Miller NW, Delate K, Jackson CG, Uchida GK, Bautista RC, Harris EJ (2004) Releases of Psyttalia fletcheri (Hymenoptera: Braconidae) and sterile flies to suppress melon fly (Diptera: Tephritidae) in Hawaii. Journal of Economic Entomology 97, 1531–1539.
PubMed |
open url image1

Wardhaugh KG, Room PM, Greenup LR (1980) The incidence of Heliothis armigera (Hubner) and H. punctigera Wallengren (Lepidoptera: Noctuidae) on cotton and other host-plants in the Namoi Valley of New South Wales. Bulletin of Entomological Research 70, 113–131. open url image1

Westphal C, Steffan-Dewenter I, Tscharntke T (2006) Foraging trip duration of bumblebees in relation to landscape-wide resource availability. Ecological Entomology 31, 389–394.
Crossref | GoogleScholarGoogle Scholar | open url image1

Williams NM, Kremen C (2007) Resource distributions among habitats determine solitary bee offspring production in a mosaic landscape. Ecological Applications 17, 910–921.
Crossref | GoogleScholarGoogle Scholar | PubMed | open url image1

Wilson AGL (1983) Abundance and mortality of overwintering Heliothis spp. Journal of the Australian Entomological Society 22, 191–199.
Crossref | GoogleScholarGoogle Scholar | open url image1

Winfree R, Williams NM, Dushoff J, Kremen C (2007) Native bees provide insurance against ongoing honey bee losses. Ecology Letters 10, 1105–1113.
Crossref | GoogleScholarGoogle Scholar | PubMed | open url image1

Zalucki MP, Furlong MJ (2005) Forecasting Helicoverpa populations in Australia: a comparison of regression-based models and a bio-climatic based modelling approach. Insect Science 12, 45–56. open url image1

Zalucki MP , Furlong MJ (In press) Predicting outbreaks of a migratory pest: an analysis of DBM distribution and abundance. In ‘Fifth international workshop on the management of the diamondback moth and other crucifer insect pests, 24–27 October 2006, Beijing, China’. (Eds AM Shelton, HL Collins, Q Wu, Y Zhang) pp. 122–131. (China Agricultural Science and Technology Press: Beijing)

Zalucki MP, Daglish G, Firempong S, Twine PH (1986) The biology and ecology of Heliothis armigera (Hubner) and H. punctigera Wallengren (Lepidoptera, Noctuidae) in Australia. What do we know? Australian Journal of Zoology 34, 779–814.
Crossref | GoogleScholarGoogle Scholar | open url image1

Zalucki MP, Gregg PC, Fitt GP, Murray DAH, Twine PH, Jones C (1994) Ecology of Helicoverpa armigera (Hubner) and H. punctigera in the inland areas of eastern Australia: larval sampling and host plant relationships during winter/spring. Australian Journal of Zoology 42, 329–346.
Crossref | GoogleScholarGoogle Scholar | open url image1