Biotic Potential and Life Table of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) from Three Brazilian Regions

Abstract

This study aimed to evaluate the biotic potential and life table of individuals of Helicoverpa armigera (Hübner) from different host plants (citrus, corn, and cotton) and Brazilian states (São Paulo, Distrito Federal, and Bahia) in artificial diet, under laboratory conditions (25 ± 1°C, 70 ± 10% RH, 14 h photophase). The longevity, pre-, post- and oviposition periods, fecundity, and fertility of 15 mating pairs per origin were evaluated. We also compared the reproductive parameters of each group of insects (São Paulo (SP), Distrito Federal (DF), and Bahia (BA)), including the net reproductive rate (Ro), mean generation time (T), intrinsic rate of increase (r ), and finite rate of increase (λ). Microsatellite analysis from individuals collected in different locations and host plants did not show differences among the parental insects. It was verified that parental progeny collected in cotton fields from Bahia had a higher biotic potential, a higher reproductive rate (Ro), and a better fecundity compared to the insects from remaining regions. The life table charts indicate that the highest values for the reproductive parameters of the Bahia progeny are associated with higher specific fertility, particularly in early adulthood. The greatest biotic potential of the Bahia progeny may be due to increased selection pressure from the insecticide used (organophosphate and pyrethroid) on cotton crops compared to that of other crops, as well due to the massive adoption of Bt cotton-producing areas of that state from 2013 outbreaks.

Biotic Potential and Life Tables of Chrysodeixis includens (Lepidoptera: Noctuidae), Rachiplusia nu, and Trichoplusia ni on Soybean and Forage Turnip

“…This study showed that the three species of Plusiinae were able to develop and successfully reproduce using soybean or forage turnip as host plants, thus sharing a typical trend of polyphagous species (Hensley et al 1964; Canerday and Arant 1966; Lafontaine and Poole 1991; Pastrana 2004; Specht et al 2006, 2015; Wagner et al 2011; Barrionuevo et al 2012; Baldin et al 2014; Luz et al 2014; Barrionuevo and San Blás 2015; Detoni et al 2018). Moreover, BP estimated for the three species was above 10 21 per year, higher than the values estimated for other insect pest species such as Agrotis , Anicla , Helicoverpa , and Spodoptera (Specht et al 2008, 2013; Montezano et al 2013, 2014, 2015; Silva et al 2018a,b). This finding indicates the potential economical losses that these species may cause to a wide variety of crop species, including those used in rotation systems.…”

The Granulate Cutworm (Lepidoptera: Noctuidae): Biological Parameters Under Controlled Conditions, Host Plants, and Distribution in the Americas

“…The life table parameters presented for F. subterranea are similar to other polyphagous owlet moth pests that fed on an artificial diet ( Barrionuevo et al 2012 ; Montezano et al 2013a , 2014b , 2015b , 2019b ; Silva et al 2018a , b ; Specht and Roque-Specht 2019 ) or on their preferred host plants ( Greenberg et al 2001 , Santos et al 2005 , Farahani et al 2011 , Bortoli et al 2012 , Specht et al 2019 ). These parameters are characterized by a high net reproductive rate ( R o ) and short mean generation time ( T ).…”

“…The survival was also higher than observed for several other owlet moths and cutworms reared in nearly identical conditions by some of the authors (A.S., D.G.M., V.F.R.-S., S.V.P.M., and I.S.B.) (e.g., Montezano et al 2013a , b , 2014a ,b, 2015a , b , 2019a , b ; Specht and Roque- Specht 2016, 2019 ; Silva et al 2018a , b ). Considering that the adequacy of different formulations of owlet moths artificial diets modify the developmental paramenters, (e.g., Bavaresco et al 2004 ) the lower survival rates of F. subterranea obtained by Vendramim et al (1982) on artificial diet, may be partly accounted to the differences between the artificial diet formulations used by those authors and in the present study.…”

“…The biotic potential of F. subterranea (3.124 × 10 24 individuals per female) is particularly high, and similar to the biotic potential of some major pest species of owlet moths and loopers ( Specht et al 2019 ), Helicoverpa armigera (Hübner) (old world cotton bollworm) ( Silva et al 2018a ) and species of Spodoptera (e.g., Montezano et al 2013a , 2014b , 2019b ).…”

Fertility Life Table, Population Parameters and Biotic Potential of Helicoverpa gelotopoeon (Dyar) (Lepidoptera: Noctuidae)

“…The net reproductive rate (R 0 ) of females of H. gelotopoeon was lower than that reported for H. armigera by Singh andYadav 2009, Gomes et al (2017) and Silva et al (2017) (332.43; 566 and 303.66 respectively). The intrinsic rate of increase (r) and the finite rate of population increase (λ) however, showed similar values when compared with other reports of H. armigera (Choudhury et al 2012, Razmjou 2013, Naseri et al 2014, Silva et al 2017. Time elapsed between generations was in general lower than those found for H. armigera (Dabhi and Patel 2007, Singh and Yadav 2009, Jha et al 2014, Gomes et al 2017, and the time taken for the population of H. gelotopoeon to double in size (DT) was similar to some reports of H. armigera (Choudhury et al 2012, Razmjou et al 2013 and Helicoverpa assulta (Guenée) (Wang et al 2008).…”