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Bull Entomol Res

Title:		"Long-term changes in the numbers of Helicoverpa punctigera (Lepidoptera: Noctuidae) in a cotton production landscape in northern New South Wales, Australia"
Author(s):		Baker GH; Tann CR;
Address:		"CSIRO Agriculture and Food,GPO Box 1700,Canberra,A.C.T. 2601,Australia. CSIRO Agriculture and Food, Locked Bag 59,Narrabri,N.S.W. 2390,Australia"
Journal Title:		Bull Entomol Res
Year:		2017
Volume:		20161110
Issue:		2
Page Number:		174 - 187
DOI:		10.1017/S0007485316000821
ISSN/ISBN:		1475-2670 (Electronic) 0007-4853 (Linking)
Abstract:		"Two noctuid moths, Helicoverpa punctigera and Helicoverpa armigera, are pests of several agricultural crops in Australia, most notably cotton. Cotton is a summer crop, grown predominantly in eastern Australia. The use of transgenic (Bt) cotton has reduced the damage caused by Helicoverpa spp., but the development of Bt resistance in these insects remains a threat. In the past, large populations of H. punctigera have built up in inland Australia, following autumn-winter rains. Moths have then migrated to the cropping regions in spring, when their inland host plants dried off. To determine if there have been any long-term changes in this pattern, pheromone traps were set for H. punctigera throughout a cropping landscape in northern New South Wales from 1992 to 2015. At least three generations of moths were caught from spring to autumn. The 1st generation (mostly spring migrants) was the most numerous. Trap captures varied between sites and decreased in time, especially for moths in the 1st generation. Nearby habitat type influenced the size of catch and there was some evidence that local weather also influenced the numbers of moths caught. There was no correlation between trap catches in the cropping region and rainfall in the inland. In addition, there was little evidence that Bt cotton has reduced the abundance of H. punctigera at landscape scale. The apparent decline in the number of presumably Bt susceptible moths arriving each spring in the cropping regions from inland habitats is of concern in relation to the management of Bt resistance"
Keywords:		"*Animal Migration Animals Bacillus thuringiensis/genetics Crop Production *Ecosystem Gossypium/genetics/growth & development Male Moths/*physiology New South Wales *Pest Control, Biological Plants, Genetically Modified/genetics/growth & development Popula;"
Notes:		"MedlineBaker, G H Tann, C R eng England 2016/11/11 Bull Entomol Res. 2017 Apr; 107(2):174-187. doi: 10.1017/S0007485316000821. Epub 2016 Nov 10"