Laboratory evaluation of Gryon pennsylvanicum (Ashmead) (Hymenoptera, Platygastridae) as a biological control agent of Leptoglossus occidentalis Heidemann (Heteroptera, Coreidae)

Peverieri, Giuseppino Sabbatini; Furlan, Paola; Simoni, Sauro; Strong, Ward B.; Roversi, Pio Federico

doi:10.1016/j.biocontrol.2012.01.005

Cited by 32 publications

(15 citation statements)

References 23 publications

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“…Gryon obesum has been recorded from H. halys in the U.S.A. (Tillman et al 2020) and other Gryon species attack pentatomid hosts in North America and Asia (Felipe-Victoriano et al 2019;Martel et al 2019). Ooencyrtus telenomicida and G. pennsylvanicum originated from the permanent colonies maintained at CREA facilities on egg masses of H. halys and L. occidentalis as hosts, respectively (Sabbatini Peverieri et al 2012;Roversi et al 2016).…”

Section: Collection and Rearing Of The Insectsmentioning

confidence: 99%

Characteristics of the meconia of European egg parasitoids of Halyomorpha halys

Peverieri¹,

Giovannini²,

Benvenuti³

et al. 2020

JHR

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Halyomorpha halys is a severe invasive Asian pest worldwide and classical biological control is foreseen as the most promising control method. Egg parasitoids appear to be the most important natural enemies of this pest, especially the Asian hymenopteran Trissolcus japonicus. In the invaded areas, only a few egg parasitoid species have been able to adopt H. halys as a host. Anastatus bifasciatus is the most common native egg parasitoid of H. halys in Europe, but reaches only low levels of parasitization, while several other native species are only occasionally found. Recently, adventive populations have been found both in the USA and in Europe of T. japonicus, and in Italy of a second Asian species, Trissolcus mitsukurii. Species identification based on morphological traits by specialists or by molecular analysis is a crucial step in the management of biological control programs. The ability to identify the genus or species within a narrow guild of egg parasitoids based on adult emergence holes and meconium features can be a simple and useful method to support management efforts. We present here detailed descriptions of the meconium of the most frequent parasitoid species attacking H. halys in Europe and the characteristics of their emergence holes of the adult wasps.

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Section: Collection and Rearing Of The Insectsmentioning

confidence: 99%

Characteristics of the meconia of European egg parasitoids of Halyomorpha halys

Peverieri¹,

Giovannini²,

Benvenuti³

et al. 2020

JHR

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“…Female scelionids such as Gryon and Trissolcus typically mate upon or very soon after emergence with previously emerged males that remained with the egg mass waiting for the emergence of a female [ 6 , 28 ]. Females are able to parasitize host eggs shortly after emerging, but production of offspring is generally higher in the first several days after emergence and it decreases gradually over time and oviposition opportunity [ 27 , 28 , 32 ]. Considering the costs and benefits from a mass production perspective, the goal is to rear reproductive females for the shortest time with the highest production of progeny possible rather than maintaining them for a longer time with declining fecundity.…”

Section: Introductionmentioning

confidence: 99%

Rearing Trissolcus japonicus and Trissolcus mitsukurii for Biological Control of Halyomorpha halys

Peverieri

Dieckhoff²,

Giovannini

et al. 2020

Insects

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Halyomorpha halys is a severe agricultural pest of Asian origin that has invaded many countries throughout the world. Pesticides are currently the favored control methods, but as a consequence of their frequent use, often disrupt Integrated Pest Management. Biological control with egg parasitoids is seen as the most promising control method over the long-term. Knowledge of the reproductive biology under laboratory conditions of the most effective candidates (Trissolcus japonicus and Trissolcus mitsukurii) for optimizing production for field releases is strongly needed. Rearing of these egg parasitoids was tested by offering three different host supply regimes using new emerged females and aged, host-deprived females in different combinations. Results showed a mean progeny per female ranging from 80 to 85 specimens for T. japonicus and from 63 to 83 for T. mitsukurii. Sex ratios were strongly female biased in all combinations and emergence rates exceeded 94% overall. Cumulative curves showed that longer parasitization periods beyond 10–14 days (under the adopted rearing regimes) will not lead to a significantly increase in progeny production. However, ageing females accumulate eggs in their ovaries that can be quickly laid if a sufficient number of host eggs are supplied, thus optimizing host resources. Our data showed that offering H. halys egg masses to host-deprived female Trissolcus once a week for three weeks allowed its eggs to accumulate in the ovary, providing the greatest number of offspring within a three week span.

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“…The strain of the egg‐parasitoid (GP‐BC‐1, NCBI genetic sequence database GenBank code JX968492) was reared on the target host L. occidentalis in a climatic chamber (Binder KBWF 720) at 26 ± 1°C, 75 ± 10% RH and 16:8‐h L : D using glass tube rearing vials and pure honey for adult food as reported by Sabbatini Peverieri et al. (). The length of the body of the egg‐parasitoid G. pennsylvanicum was measured on 30 females and 30 males taken randomly from the colony, using a stereomicroscope Nikon SMZ 1500 provided with micrometer oculars.…”

Section: Methodsmentioning

confidence: 99%

“…Biological parameters and life‐history traits of G. pennsylvanicum on L. occidentalis were investigated in the laboratory in previous studies (Sabbatini Peverieri et al. , ).…”

Section: Introductionmentioning

confidence: 99%

Pre‐release risk assessment of the egg‐parasitoid Gryon pennsylvanicum for classical biological control of Leptoglossus occidentalis

Roversi

Peverieri

Maltese

et al. 2013

J Applied Entomology

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Leptoglossus occidentalis Heidemann (Heteroptera: Coreidae) is a North American conifer seed pest that was accidentally introduced to Europe. In the Mediterranean area, it threatens the production of Pinus pinea Linnaeus seeds. The egg‐parasitoid Gryon pennsylvanicum (Ashmead) (Hymenoptera: Platygastridae), the main natural enemy in the native range of L. occidentalis, was imported from British Columbia to Italy. Pre‐release risk assessments were made under quarantine conditions by no‐choice tests conducted with naïve and experienced G. pennsylvanicum offering single eggs of target and non‐target species for varying exposure times (1, 4, 48 h). G. pennsylvanicum successfully parasitized from 75% to 100% of the target host eggs. Only one female specimen of the egg‐parasitoid emerged from a non‐target egg (Gonocerus juniperi Herrich‐Schaeffer, Heteroptera: Coreidae). Two dead female specimens were found, one inside an egg of Coreus marginatus (Linnaeus) (Heteroptera: Coreidae) and one in an egg of Camptopus lateralis (Germar) (Heteroptera: Alydidae). All three cases occurred at the longest oviposition exposure time. Results obtained with this conservative approach suggest that the risk to non‐target species of releasing G. pennsylvanicum in Italy is low.

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Laboratory evaluation of Gryon pennsylvanicum (Ashmead) (Hymenoptera, Platygastridae) as a biological control agent of Leptoglossus occidentalis Heidemann (Heteroptera, Coreidae)

Cited by 32 publications

References 23 publications

Characteristics of the meconia of European egg parasitoids of Halyomorpha halys

Characteristics of the meconia of European egg parasitoids of Halyomorpha halys

Rearing Trissolcus japonicus and Trissolcus mitsukurii for Biological Control of Halyomorpha halys

Pre‐release risk assessment of the egg‐parasitoid Gryon pennsylvanicum for classical biological control of Leptoglossus occidentalis

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