Impact of seed blend and structured maize refuge on Helicoverpa zea (Lepidoptera: Noctuidae) potential phenological resistance development parameters in pupae and adults.

Autor: Pezzini DT; Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, USA., Reisig DD; Department of Entomology and Plant Pathology, North Carolina State University, Vernon G. James Research and Extension Center, Plymouth, NC, USA., Buntin GD; Department of Entomology, University of Georgia - Griffin Campus, Griffin, GA, USA., Del Pozo-Valdivia AI; Department of Entomology, Hampton Roads Agricultural Research and Extension Center, Virginia Polytechnic Institute and State University, Virginia Beach, VA, USA., Gould F; Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, USA., Paula-Moraes SV; Entomology and Nematology Department, West Florida Research and Education Center, University of Florida, Jay, FL, USA., Reay-Jones FP; Department of Plant and Environmental Sciences, Clemson University, Florence, SC, USA.
Jazyk: angličtina
Zdroj: Pest management science [Pest Manag Sci] 2023 Oct; Vol. 79 (10), pp. 3493-3503. Date of Electronic Publication: 2023 Jun 11.
DOI: 10.1002/ps.7529
Abstrakt: Background: Helicoverpa zea, an economic pest in the south-eastern United States, has evolved practical resistance to Bacillus thuringiensis (Bt) Cry toxins in maize and cotton. Insect resistance management (IRM) programs have historically required planting of structured non-Bt maize, but because of its low adoption, the use of seed blends has been considered. To generate knowledge on target pest biology and ecology to help improve IRM strategies, nine field trials were conducted in 2019 and 2020 in Florida, Georgia, North Carolina, and South Carolina to evaluate the impact of Bt (Cry1Ab + Cry1F or Cry1Ab + Cry1F + Vip3A) and non-Bt maize plants in blended and structured refuge treatments on H. zea pupal survival, weight, soil pupation depth, adult flight parameters, and adult time to eclosion.
Results: From a very large sample size and geography, we found a significant difference in pupal mortality and weight among treatments in seed blends with Vip3A, implying that cross-pollination occurred between Bt and non-Bt maize ears. There was no treatment effect for pupation depth, adult flight distance, and eclosion time.
Conclusion: Results of this study demonstrate the potential impact of different refuge strategies on phenological development and survival of an important pest species of regulatory concern. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
(© 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.)
Databáze: MEDLINE
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