Pest-damage relationships for Old World bollworm, Helicoverpa armigera (Lepidoptera: Noctuidae), on vegetative soybean

2016 ◽  
Author(s):  
Joao Antonio Zanardi Júnior
Keyword(s):  
Helicoverpa Armigera ◽  
Old World ◽  
Pest Damage ◽  
Helicoverpa Armígera ◽  
Old World Bollworm ◽  
Lepidoptera Noctuidae

scholarly journals A Brave New World for an Old World Pest: Helicoverpa armigera (Lepidoptera: Noctuidae) in Brazil

PLoS ONE ◽  
2013 ◽  
Vol 8 (11) ◽  
pp. e80134 ◽  
Author(s):  
Wee Tek Tay ◽  
Miguel F. Soria ◽  
Thomas Walsh ◽  
Danielle Thomazoni ◽  
Pierre Silvie ◽  
...  
Keyword(s):  
Helicoverpa Armigera ◽  
New World ◽  
Old World ◽  
Helicoverpa Armígera ◽  
Brave New World ◽  
Lepidoptera Noctuidae

scholarly journals Demographics and Genetic Variability of the New World Bollworm (Helicoverpa zea) and the Old World Bollworm (Helicoverpa armigera) in Brazil

PLoS ONE ◽  
2014 ◽  
Vol 9 (11) ◽  
pp. e113286 ◽  
Author(s):  
Natália A. Leite ◽  
Alessandro Alves-Pereira ◽  
Alberto S. Corrêa ◽  
Maria I. Zucchi ◽  
Celso Omoto
Keyword(s):  
Genetic Variability ◽  
Helicoverpa Armigera ◽  
Helicoverpa Zea ◽  
New World ◽  
Old World ◽  
Helicoverpa Armígera ◽  
Old World Bollworm

scholarly journals Comparative Toxicity of Helicoverpa armigera and Helicoverpa zea (Lepidoptera: Noctuidae) to Selected Insecticides

Insects ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 431 ◽  
Author(s):  
Fernando R. da Silva ◽  
Dario Trujillo ◽  
Oderlei Bernardi ◽  
Jose Carlos Verle Rodrigues ◽  
Woodward D. Bailey ◽  
...  
Keyword(s):  
Puerto Rico ◽  
Acute Toxicity ◽  
Insecticide Resistance ◽  
Helicoverpa Armigera ◽  
Helicoverpa Zea ◽  
Corn Earworm ◽  
Median Lethal Concentration ◽  
Helicoverpa Armígera ◽  
Old World Bollworm ◽  
Lepidoptera Noctuidae

Until recently, the Old World bollworm (OWB) Helicoverpa armigera (Hübner) and the corn earworm Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) were geographically isolated. Both species are major pests of agricultural commodities that are known to develop insecticide resistance, and they now coexist in areas where H. armigera invaded the Americas. This is the first study to compare the susceptibility of the two species to conventional insecticides. The susceptibility of third instar H. armigera and H. zea larvae to indoxacarb, methomyl, spinetoram, and spinosad was determined using a diet-overlay bioassay in a quarantine laboratory in Puerto Rico. Mortality was assessed at 48 h after exposure for up to eight concentrations per insecticide. Spinetoram exhibited the highest acute toxicity against H. armigera, with a median lethal concentration (LC50) of 0.11 µg a.i./cm2, followed by indoxacarb and spinosad (0.17 µg a.i./cm2 for both) and methomyl (0.32 µg a.i./cm2). Spinetoram was also the most toxic to H. zea (LC50 of 0.08 µg a.i./cm2), followed by spinosad (0.17 µg a.i./cm2) and methomyl (0.18 µg a.i./cm2). Indoxacarb was the least toxic to H. zea, with an LC50 of 0.21 µg a.i./cm2. These findings could serve as a comparative reference for monitoring the susceptibility of H. armigera and H. zea to indoxacarb, methomyl, spinetoram, and spinosad in Puerto Rico, and may facilitate the detection of field-selected resistance for these two species and their potential hybrids in areas recently invaded by H. armigera.

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