Intraguild Interactions

Intraguild predation and competitive displacement between Nesidiocoris tenuis and Dicyphus maroccanus, two biological control agents in tomato pests

“…Among those ecological interspecific interactions, competition and intraguild predation are clearly recognized as affecting the structure and dynamics of natural enemies and thus influencing the outcome of biocontrol success (Rosenheim et al ., ; Snyder & Wise, ; Lucas & Alomar, ; Boivin & Brodeur, ). The former implies interactions ( via exploitation or interference) between competitors through a shared resource, while the latter occurs between consumers belonging to the same guild engaged in a predator–prey interaction (IGP predator–IGP prey) and sharing an alternative (extra‐guild) prey (Lucas, ). Intraguild predation can be categorized as “coincidental,” which occurs when the IGP predator attacks a herbivore that has previously been attacked by a parasitoid or pathogen (called the intermediate predator), and “omnivorous” when one predator encounters and consumes another predator and share the same herbivore (Polis et al ., ; Rosenheim & Harmon, ).…”

Predators and parasitoids of the harlequin ladybird, Harmonia axyridis, in its native range and invaded areas

“…The predators can be either intraguild or extraguild but the distinction, however, is not always obvious, because the guilds of many ladybirds and other predators may change depending on the season and food availability. Harmonia axyridis, for example, may switch among various kinds of prey or plant food (pollen, nectar, fruit) (Koch 2003;Lucas 2012). Many aphids and other hemipterans (Adelgidae, Psyllidae, Aleyrodidae), and even pollen were found to be essential food for this species (Berkvens et al 2008;Hodek and Honȇk 2009;Hodek and Evans 2012).…”

Coccinellidae Parasitoids in Brazil: Neglected Species in a Mega-Diverse Country

“…They are part of complex food webs acting at the same time as predators, competitors, intraguild predators and prey (Lucas 2012). The knowledge on these predator species and their interactions is widespread, but information on their parasitoid species are less studied and understood.…”