Frequency, efficiency, and physical characteristics of predation by generalist predators of brown marmorated stink bug (Hemiptera: Pentatomidae) eggs
By W. Morrison, C. Mathews, Tracy Leskey. 2016
87 citations recorded by the source corpus.
Abstract The native generalist predator community of Halyomorpha halys, an invasive species in the United States and Europe, has not been well defined to date. The aims of the current study were to determine whether generalist predators that are commonly found in mid-Atlantic orchards and vegetable crops are capable of feeding on H. halys eggs and, if so, to systematically characterize the appearance of feeding damage in order to link it to sentinel egg mass surveys. Over 25 field-collected and commercially available arthropod predator taxa, including adults and immatures, were evaluated as potential predators of H. halys eggs in laboratory trials, and a photographic library of egg mass damage was developed. In addition, over 400 sentinel egg masses were deployed in tree fruit and vegetable crops, and direct observations were made of predator taxa in situ. We found that the most frequent and efficient predators of H. halys eggs were katydids and ground beetles, and to a lesser extent earwigs, jumping spiders, and crickets. Egg damage for each taxon studied was ascribed to one of four egg damage syndromes: complete chewing, incomplete chewing, stylet sucking, and punctured sucking. The first two are caused by predators with chewing mouthparts and are differentiated by the presence of irregular chorion debris left behind in the case of incomplete chewing compared with nothing left behind or an entire segment of the egg mass completely removed for complete chewing. The latter two are caused by predators with piercing/sucking mouthparts or chelicerae and are separable by the presence of a feeding sheath for stylet sucking compared to a simple hole or slit in otherwise hollowed eggs for punctured sucking via chelicerae. Complete and incomplete chewing were the two feeding syndromes most frequently documented in the field and with the greatest number of eggs consumed per egg mass. Taxa evaluated in laboratory trials were reliably found in tree fruit and vegetable crops. Overall, our work contributes to the identification of key egg mass predators of H. halys in specialty crop agroecosytems.
Subfields: Ecology, Evolution, Behavior and Systematics, Insect Science
View Paper: https://www.semanticscholar.org/paper/c428b80fee7c5a3c8d72fd12deb9ce860a189fce
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In Ecology, Evolution, Behavior and Systematics
In Insect Science
Citations in the corpus
- Natural enemy impact on eggs of the invasive brown marmorated stink bug, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), in organic agroecosystems: A regional assessment (2016, background): “Morrison et al. (2016) demonstrated that frozen sentinel H. halys eggs deployed in the field and surrounded by predator exclusion cages were sometimes sunken with no stylet sheath, indicating sunken eggs without stylet sheaths were not necessarily sunken due to predation.”