Areal Distribution and Parasitism on Other Soybean Bugs of Trissolcus nigripedius (Hymenoptera: Scelionidae), an Egg Parasitoid of Dolycoris baccarum (Heteroptera: Pentatomidae)

Abstract The brown marmorated stink bug, Halyomorpha halys (Stål), is a highly polyphagous species native to Asia that has become a serious invasive agricultural and nuisance pest across North America and Europe. Classical biological control host range evaluations have revealed egg parasitoid Trissolcus japonicus (Ashmead) to be the primary candidate biocontrol agent for field release against H. halys. However, these evaluations only provide us with the physiological host range of T. japonicus. Other Trissolcus species have demonstrated that contact kairomones from different host species elicit varied responses in the parasitoids’ host foraging behaviors. To assess T. japonicus response to host kairomones, mated naive females were exposed to leaf surfaces contaminated with adult kairomones from its preferred host, H. halys, or from a native nontarget host, Podisus maculiventris (Say) (Heteroptera: Pentatomidae). Red maple, apple, and soybean were used as plant substrate treatments. The wasp’s residence time on the leaf surface, linear walking velocity, and angular walking velocity were observed and measured using Noldus EthoVision XT tracking software. Within each leaf treatment, T. japonicus displayed stronger behavioral responses on leaves contaminated with contact kairomones from H. halys. The parasitoid resided on H. halys contaminated leaves for approximately twice as a long as it did on P. maculiventris contaminated leaves. Further, both species’ kairomones elicited significant decreases in parasitoid walking velocity on all tested substrate types. Overall, our study suggests that kairomone-based behavioral studies can be used to further evaluate the host specificity of T. japonicus and can be an invaluable supplement to classical biocontrol host range testing regimes.

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Host Handling Behavior of the Egg Parasitoid, Telenomus triptus NIXON (Hymenoptera: Scelionidae), of Egg Masses of the Stink Bug, Piezodorus hybneri GMELIN (Heteroptera: Pentatomidae), in a Soybean Field

Applied Entomology and Zoology ◽

10.1303/aez.30.584 ◽

1995 ◽

Vol 30 (4) ◽

pp. 584-587

Author(s):

Hiroya HIGUCHI

Keyword(s):

Egg Parasitoid ◽

Stink Bug ◽

Soybean Field ◽

Egg Masses ◽

Heteroptera Pentatomidae

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Trissolcus radjabii n.sp. (Hymenoptera: Platygastridae), an egg parasitoid of the shield bug, Apodiphus amygdali (Heteroptera: Pentatomidae) and the sunn pest, Eurygaster integriceps (Heteroptera: Scutelleridae)

Zootaxa ◽

10.11646/zootaxa.2515.1.4 ◽

2010 ◽

Vol 2515 (1) ◽

pp. 65 ◽

Cited By ~ 3

Author(s):

SHAHZAD IRANIPOUR ◽

NORMAN F. JOHNSON

Keyword(s):

Fore Wing ◽

New World ◽

Egg Parasitoid ◽

Taxonomic Study ◽

Sunn Pest ◽

World Species ◽

Eurygaster Integriceps ◽

Palearctic Species ◽

Heteroptera Pentatomidae ◽

World Fauna

Kozlov and Kononova (1983) classified 53 Palearctic species of the genus Trissolcus Ashmead into five groups. The presence of the hyperoccipital carina, convex frons, absence of notauli, and elongate postmarginal vein (longer than the stigmal vein) in the fore wing are characteristics delimiting the gonopsidis-group. These species differ from the flavipes-group only in the lack of notauli. Kozlov and Kononova placed three species in the gonopsidis-group: T. mentha Kozlov and Lê, T. gonopsidis (Watanabe), and T. elasmuchae (Watanabe). In a taxonomic study of the Trissolcus species of Korea and Japan, Ryu and Hirashima (1984) reported three other species with characteristics of the gonopsidis-group: T. nigripedius (Nakagawa), T. itoi Ryu and T. yamagishi Ryu. Most of these species are known only from Japan or Korea. Trissolcus elasmuchae has been observed in Ukraine and Russia as well as Japan, and T. mentha is known only from Uzbekistan. Trissolcus antakyaensis Doganlar was described recently as an egg parasitoid of the pentatomid Rhaphigaster nebulosa (Poda) from Turkey (Doganlar 2001). It, too, fits within this gonopsidis- group. The New World species of Trissolcus were divided into three groups (Johnson 1984, 1985a, 1985b); the thyantae, basalis, and flavipes groups of Johnson are roughly equivalent to the simoni, semistriatus, and flavipes groups of Kozlov and Kononova respectively. No species of gonopsidis and oobius groups of Kozlov and Kononova have been reported in New World fauna.

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