Annals of the Entomological Society of America (2019) 112, 388-401

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Luke R. Tembrock, Alicia E. Timm, Frida A. Zink and Todd M. Gilligan (2019)
Phylogeography of the recent expansion of Helicoverpa armigera (Lepidoptera: Noctuidae) in South America and the Caribbean Basin
Annals of the Entomological Society of America 112 (4), 388-401
Abstract: The Old World bollworm, Helicoverpa armigera (Hübner), is one of the most destructive agricultural pests worldwide. It was first recorded in Brazil in 2013, yet despite this recent introduction, H. armigera has spread throughout much of Latin America. Where H. armigera has become established, it is displacing or hybridizing with the congeneric New World pest Helicoverpa zea. In addition to the adaptive qualities that make H. armigera a megapest, such as broad range pesticide resistance, the spread of H. armigera in the New World may have been hastened by multiple introductions into South America and/or the Caribbean. The recent expansion of the range of H. armigera into the New World is analyzed herein using mtDNA of samples from South America, the Caribbean Basin, and the Florida Peninsula. Phylogeographic analyses reveal that several haplotypes are nearly ubiquitous throughout the New World and native range of H. armigera, but several haplotypes have limited geographic distribution from which a secondary introduction with Euro-African origins into the New World is inferred. In addition, host–haplotype correlations were analyzed to see whether haplotypes might be restricted to certain crops. No specialization was found; however, some haplotypes had a broader host range than others. These results suggest that the dispersal of H. armigera in the New World is occurring from both natural migration and human-mediated introductions. As such, both means of introduction should be monitored to prevent the spread of H. armigera into areas such as the United States, Mexico, and Canada, where it is not yet established.
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Full text of article

Database assignments for author(s): Alicia E. Timm

Research topic(s) for pests/diseases/weeds:
new introduction of pest
population dynamics/ epidemiology

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.
Helicoverpa armigera Italy
Helicoverpa armigera Portugal (continental)
Helicoverpa armigera Korea-South
Helicoverpa armigera South Africa
Helicoverpa armigera Morocco
Helicoverpa armigera Colombia
Helicoverpa armigera U.S.A. (SE)
Helicoverpa armigera Green pepper/chilli (Capsicum) North Macedonia
Helicoverpa armigera Green pepper/chilli (Capsicum) Dominican Republic
Helicoverpa armigera Sunflower (Helianthus annuus) Pakistan
Helicoverpa armigera Sorghum (crop) Puerto Rico
Helicoverpa armigera Chickpea (Cicer arietinum) Jordan
Helicoverpa armigera Basil (Ocimum) Israel
Helicoverpa armigera Rosa (crop) Philippines
Helicoverpa armigera Rosa (crop) Uganda
Helicoverpa armigera Chrysanthemum (genus) India
Helicoverpa armigera Eustoma (crop) Japan
Helicoverpa armigera Gypsophila (crop) Kenya
Helicoverpa armigera Chamelaucium (crop) Peru
Helicoverpa armigera Veronica (crop) Thailand
Helicoverpa armigera Leucospermum (crop) Netherlands
Helicoverpa armigera Leucospermum (crop) Spain (continental)
Helicoverpa armigera Leucospermum (crop) Zimbabwe
Helicoverpa armigera Leucospermum (crop) Palestinian Territories