Fertility and life expectancy of the predator Supputius cincticeps (Heteroptera: Pentatomidae) exposed to sublethal doses of permethrin

Abstract

The stinkbug Supputius cincticeps (Stål) (Heteroptera: Pentatomidae) can be found in agricultural and forest ecosystems feeding primarily on larvae of Coleoptera and Lepidoptera, where it can be exposed to insecticide applications. This study therefore aimed to evaluate the reproductive potential of'S. cincticeps after exposition to sublethal doses of permethrin (5.74 x 10 -3 , 5.74 x 10 -2 , 5.74 x 10 -1 , 5.74 and 57.44 ppb) through the use of a fertility life table. The development cycle of this predator was determined in order to calculate its net reproductive rate (R 0 ), the infinitesimal (r m ) and finite (λ) rates of increase in addition to mean generation time (T). The net reproductive (18.31), infinitesimal (r m ) (0.050) and finite (λ) (1.051) rates of increase were higher, while generation time (57.93 days) was shorter for S. cincticeps exposed to 5.74x10 -1 ppb of permethrin than in the control. This indicates a higher rate of population increase of this predator when exposed to this permethrin dose.

Sublethal effects of indoxacarb on the diamondback moth, Plutella xylostella (L.) (Lepidoptera: Yponomeutidae)

“…Sublethal doses affect the physiological and behavioral properties of insects (Haynes 1988). Sublethal doses can influence the developmental time (Wang et al 2008), weight of larvae, pupae, adults (Yin et al 2008;Gupta and Chandel 1995), adult longevity (Cutler et al 2005;Ergin et al 2007), hatchability (Alyokhin et al 2008;Nadda et al 2005), fecundity (Haseeb and Amano 2002;Wang et al 2009), egg size (Fujiwara et al 2002;Yin et al 2008), and reproduction parameters such as the net reproductive rate (R 0 ), intrinsic rate of increase (r m ), finite rate of increase (k), generation time (T), doubling time (Dt) (Rezaei et al 2007;Zanuncio et al 2005;Lashkari et al 2007), and the sex ratio (Delpuech and Meyet 2003). Sublethal doses of insecticides frequently cause resurgence through physiological and ecological mechanisms (Ripper 1956;Luckey 1968).…”

Decrease in Pupation and Adult Emergence of Plutella xylostella (L.) treated with Hexaflumuron

“…They also affect reproductive parameters, such as net reproductive rate (R0), intrinsic rate of increase (rm), finite rate of increase (λ), generation time (T) (Hui-Dong et al, 2004;Zanuncio et al, 2005;Mahmoudvand et al, 2011b), pre-oviposition, oviposition and post-oviposition periods (Josan and Singh, 2000;Hamedi et al, 2010), hatchability (Sammour et al, 2008), adult longevity (Cutler et al, 2005;Suh et al, 2009), egg size (Fujiwara et al, 2002), and sex ratio (Delpuech and Meyet, 2003).…”

Phytochemistry and quantification of polyphenols in extracts of the Asteraceae weeds from Diamantina, Minas Gerais state, Brazil

“…They may affect food preference and pre-and post-ingestion of food (Bernays et al, 1989) and reduce damage by herbivores (Mueller-Harvey, 2001;Schofield et al, 2001). In addition, compounds can be selective insecticides to parasitoids and predators (Zanuncio et al, 1998(Zanuncio et al, , 2003(Zanuncio et al, , 2005Vianna et al, 2009). …”