How predation by Podisus nigrispinus is influenced by developmental stage and density of its prey Alabama argillacea

Abstract

The functional response of a predator to the density of its prey is affected by several factors, including the prey's developmental stage. This study evaluated the functional response of Podisus nigrispinus (Dallas) (Hemiptera: Heteroptera: Pentatomidae) females to fourth instars and pupae of Alabama argillacea (H€ ubner) (Lepidoptera: Noctuidae), an important pest of cotton (Gossypium hirsutum L., Malvaceae) in Brazil. The prey were exposed to the predator for 12 and 24 h, and in densities of 1, 6, 12, 18, 24, and 30 items per predator female. The predation data were subjected to polynomial regression logistic analysis to determine the type of functional response. Holling and Rogers' equations were used to estimate parameters such as attack rate and handling time. Podisus nigrispinus females showed functional response types II and III by preying on larvae and pupae, respectively. The attack rate and handling time did not differ between the 12 and 24 h exposure times. Predation rate was higher at higher larval and pupal densities; predation was highest at a density of 30 prey items per female, and it was similar at 18 and 24 prey per predator. Understanding the interaction of predators and their food resources helps to optimize biological control strategies. It also helps the decisionmaking and the improvement of release techniques of P. nigrispinus in the field.

Predation of diamondback moth larvae and pupae by Euborellia annulipes

“…Some larvae respond to predator attacks through natural, chemical, behavioral or physiological stimuli, and also by induction, with evasive or defense movements (Grosman et al, 2008;Greeney et al, 2009). Prey movements may also stimulate the attack and influence the predation activity and success (Zanuncio et al, 2008;Silva et al, 2012;Vacari et al, 2012;Santos et al, 2016), as observed in E. annulipes. However, other food resources may be present in the field and the predator may consequently show greater selection of food due to its omnivorous nature (Kocarek et al, 2015).…”

ABUNDANCIA Y DEPREDACIÓN DE Ceraeochrysa valida (NEUROPTERA: CHRYSOPIDAE) SOBRE Diaphorina citri (HEMIPTERA: LIVIIDAE) EN COLIMA, MÉXICO

“…Esta mortalidad se incrementó a un 73,51% deduciendo por diferencia que probablemente la liberación de C. valida puede llegar a ejercer hasta un control del 50%. La comprensión de la interacción de los depredadores y sus fuentes de alimentación ayuda a optimizar las estrategias de control biológico (Dos Santos et al, 2016).…”

Life stage and population density ofPlutella xylostellaaffect the predation behavior ofEuborellia annulipes

“…The preference behavior observed of the ringlegged earwig has previously been described for others, for instance, the feeding preference of the pentatomid Podisus nigrispinus (Dallas) for lepidopteran larvae over pupae in choice tests (Vacari et al, 2012;Santos et al, 2016). The preference behavior observed of the ringlegged earwig has previously been described for others, for instance, the feeding preference of the pentatomid Podisus nigrispinus (Dallas) for lepidopteran larvae over pupae in choice tests (Vacari et al, 2012;Santos et al, 2016).…”

“…The R 2 adj measured the strength of the relationship between the model and the predation data (Santos et al, 2016). L can be obtained using sample size (n) and residual sum of squares (RSS).…”

“…L can be obtained using sample size (n) and residual sum of squares (RSS). The R 2 adj measured the strength of the relationship between the model and the predation data (Santos et al, 2016). Because R 2 values do not necessarily indicate the goodness-of-fit of the models, AIC was used to compare the fit of the two functional response models (Pach u et al, 2018).…”