Frequency, efficiency, and physical characteristics of predation by generalist predators of brown marmorated stink bug (Hemiptera: Pentatomidae) eggs

Abstract

Morrison et al.; Frequency, feeding habits … Submitted to: Biological Control 1 2 Frequency, efficiency, and physical characteristics of predation by generalist predators 3 of brown marmorated stink bug (Hemiptera: Pentatomidae) eggs 4 5 2 Morrison et al.; Frequency, feeding habits … Abstract 15The native generalist predator community of Halyomorpha halys, an invasive species in the 16 United States and Europe, has not been well defined to date. The aims of the current study 17 were to determine whether generalist predators that are commonly found in mid-Atlantic 18 orchards and vegetable crops are capable of feeding on H. halys eggs and, if so, to 19 systematically characterize the appearance of feeding damage in order to link it to sentinel 20 egg mass surveys. Over 25 field-collected and commercially available arthropod predator 21 taxa, including adults and immatures, were evaluated as potential predators of H. halys eggs 22

Surveying native egg parasitoids and predators of the invasive Halyomorpha halys in Northern Italy

“…In the United States, predation on sentinel egg masses was similarly low, ranging from 4% to 11% (Cornelius et al, ; Jones et al, ; Ogburn et al, ). In these surveys, tettigonids and carabids were identified as the most efficient predators of H. halys eggs (Morrison et al, ). In our survey, we observed residues of eggshells, possibly preyed by chewing predators, but their identity remains unknown.…”

“…Although fresh food was provided to the caged adults twice a week, cannibalism might have occurred to respond to physiological necessity of alternative, protein‐rich food sources (Thomas & Manica, ). Apart from cannibalism, eggs could have been eaten by predators with piercing–sucking mouthparts, small enough to penetrate the mesh barrier, such as Miridae and Anthocoridae, that have been reported as predators of H. halys eggs in previous studies (Abram et al, ; Morrison et al, ).…”

“…Depending on the type of predator, H. halys eggs can show different signs of damage, which are related to the morphology of the predator's mouthparts. Symptoms of predators chewing or sucking on eggs have been classified as complete and incomplete chewing or stylet and punctured sucking (Morrison, Mathews, & Leskey, ). Dermaptera consume H. halys eggs from the top leaving edges, Tettigonidae chew the entire egg masses, whereas sucking consumption is mainly due to predatory Hemiptera that leave feeding sheaths on the surface of the eggs (Abram, Doyon, Brodeur, Gariépy, & Boivin, ; Morrison et al, ).…”

“…Symptoms of predators chewing or sucking on eggs have been classified as complete and incomplete chewing or stylet and punctured sucking (Morrison, Mathews, & Leskey, ). Dermaptera consume H. halys eggs from the top leaving edges, Tettigonidae chew the entire egg masses, whereas sucking consumption is mainly due to predatory Hemiptera that leave feeding sheaths on the surface of the eggs (Abram, Doyon, Brodeur, Gariépy, & Boivin, ; Morrison et al, ). Consumption of eggs by sucking predators is also associated with cannibalism, especially by second instars of H. halys (Iverson, Cira, Burkness, & Hutchison, ).…”

The consequences of sublethal exposure to insecticide on the survivorship and mobility ofHalyomorpha halys(Hemiptera: Pentatomidae)

“…Even though we have employed the most efficacious compounds against H. halys , we were unable to eliminate the threat posed by H. halys , as adults remained mobile after brief exposure to field recommended rates. Further research should evaluate any sublethal effects that may affect recently identified generalist natural enemies or parasitoids of H. halys . In addition, a larger selection of insecticides (including those that are less effective) should be assessed for the effects of brief exposures on the mobility and behavior of H. halys , as well as investigating additional measures such as the consequences that brief doses may have on the fecundity and development of earlier developmental stages.…”