Natural biological control of Bagrada hilaris by egg predators and parasitoids in north-central California

Hogg, Brian; Grettenberger, Ian M.; Borkent, Christopher J.; Stokes, Keith; Zalom, Frank G.; Pickett, Charles H.

doi:10.1016/j.biocontrol.2022.104942

Cited by 7 publications

(8 citation statements)

References 34 publications

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“…Furthermore, it can search for and attack B. hilaris eggs in the soil (Tofangsazi et al 2020, Martel and Sforza 2021), whereas T. hyalinipennis either cannot or can with only low efficiency (Tofangsazi et al 2020). In a survey of California using sentinel B. hilaris eggs that were glued to cards and placed either on the ground or in plant foliage, about 90% of parasitism occurred in plant foliage (Hogg et al 2022), where all other stink bugs besides B. hilaris are likely to lay their eggs.…”

Section: Introductionmentioning

confidence: 99%

“…Gryon aetherium and T. hyalinipennis have since appeared in the invasive range of B. hilaris in the New World, where they are likely to be adventive. Gryon aetherium was found attacking B. hilaris eggs in California (Hogg et al 2021, 2022), Mexico (Felipe-Victoriano et al 2019, reported as G. myrmecophilum ) and Chile (Rojas-Gálvez et al 2021), and T. hypalinpennis emerged from sentinel B. hilaris eggs in southern California (Ganjisaffar et al 2018). Previous studies in California documented the presence of G. aetherium at individual sites, either using previously frozen sentinel eggs (Hogg et al 2022) or a combination of sentinel and naturally laid eggs (Hogg et al 2021), but the distribution and impact of G. aetherium in California remain unclear.…”

Section: Introductionmentioning

confidence: 99%

“…Gryon aetherium was found attacking B. hilaris eggs in California (Hogg et al 2021, 2022), Mexico (Felipe-Victoriano et al 2019, reported as G. myrmecophilum ) and Chile (Rojas-Gálvez et al 2021), and T. hypalinpennis emerged from sentinel B. hilaris eggs in southern California (Ganjisaffar et al 2018). Previous studies in California documented the presence of G. aetherium at individual sites, either using previously frozen sentinel eggs (Hogg et al 2022) or a combination of sentinel and naturally laid eggs (Hogg et al 2021), but the distribution and impact of G. aetherium in California remain unclear. In this study we assessed the geographic distribution and attack rates of G. aetherium on naturally laid B. hilaris eggs at multiple sites in California, focusing primarily on the Salinas Valley, where most cruciferous crops in the United States are grown.…”

Section: Introductionmentioning

confidence: 99%

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Parasitism by Gryon aetherium (Hymenoptera: Scelionidae) on Bagrada hilaris (Hemiptera: Pentatomidae) eggs in northcentral California

Hogg,

Grettenberger,

Borkent

2023

Journal of Economic Entomology

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Bagrada bug, Bagrada hilaris (Burmeister) (Hemiptera: Pentatomidae), is an invasive pest of cruciferous crops. The parasitoid Gryon aetherium Talamas (Hymenoptera: Scelionidae) is a promising biological control agent for B. hilaris because it can forage in the soil where B. hilaris deposits most of its eggs. In this study, we assessed parasitism by G. aetherium on B. hilaris eggs in situ in northcentral California, including the Salinas Valley where most cruciferous crops in the United States are grown. Parasitism was documented by leaving soil-filled trays under infested plants for 7–14 days, then removing eggs and holding them for emergence of parasitoids. Gryon aetherium accounted for over 99% of emerged parasitoids, and occurred at 11 of the 12 sampled sites. Of the 17,729 and 31,759 B. hilaris eggs collected in 2021 and 2022, 1,518 (8.84%) and 2,654 (8.36%) were parasitized by G. aetherium, respectively. Parasitism rates were generally higher inland and ranged from 3.64% to 44.93% in 2021 and from 1.01% to 23.04% in 2022, and never exceeded 15% on any sample dates at several coastal sites in the Salinas Valley. Discovery efficiency (a measure of the ability of parasitoids to locate egg patches) reached 80% or higher at all but 1 site, but exploitation efficiency (a measure of the ability of parasitoids to exploit the egg patch after it has been discovered) was generally <20%, suggesting that G. aetherium can locate egg patches efficiently but is less efficient at finding eggs within patches.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Parasitism by Gryon aetherium (Hymenoptera: Scelionidae) on Bagrada hilaris (Hemiptera: Pentatomidae) eggs in northcentral California

Hogg,

Grettenberger,

Borkent

2023

Journal of Economic Entomology

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“…The Bagrada bug, Bagrada hilaris Burmeister (Hemiptera: Pentatomidae), is an invasive pest of cruciferous crops (Brassicaceae). Sentinel egg masses were deployed over a three-year period, and chewing predators were found to be much more common in the field, with piercing/sucking predators rarely found; the predation rates varied between sites and years (11–33%) [ 121 ]. The identity of these predators could not be determined.…”

Section: Introductionmentioning

confidence: 99%

Natural Enemies and Biological Control of Stink Bugs (Hemiptera: Heteroptera) in North America

Ademokoya

Athey

Ruberson

2022

Insects

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Stink bugs comprise a significant and costly pest complex for numerous crops in the US, including row crops, vegetables, and tree fruits and nuts. Most management relies on the use of broad-spectrum and disruptive insecticides with high human and environmental risks associated with them. Growing concerns about pesticide resistance in stink bugs are forcing pest managers to explore safer and more sustainable options. Here, we review the diverse suite of natural enemies of stink bugs in the US, noting that the egg and the late nymphal and adult stages of stink bugs are the most commonly attacked by parasitoids, whereas eggs and young nymphs are the stages most commonly attacked by predators. The effectiveness of stink bugs’ natural enemies varies widely with stink bug species and habitats, influencing the biological control of stink bugs across crops. Historically, biological control of stink bugs has focused on introduction of exotic natural enemies against exotic stink bugs. Conservation and augmentation methods of biological control have received less attention in the US, although there may be good opportunities to utilize these approaches. We identify some considerations for the current and future use of biological control for stink bugs, including the potential for area-wide management approaches.

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“…The attack on seedlings can be particularly severe, impacting yields and creating the need for replanting, increasing production costs; in some fields, B. hilaris destroyed up to 60% of seedlings (Reed et al 2013). Since the last decade, B. hilaris became a key pest of brassicaceous crop production in the United States and Mexico (Hogg et al 2022).…”

mentioning

confidence: 99%

Combined Activity of Natural Products and the Fungal Entomopathogen Cordyceps farinosa against Bagrada hilaris (Hemiptera: Pentatomidae)

Felipe-Victoriano,

Villegas-Luján,

Treviño-Cueto

et al. 2023

Florida Entomologist

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Natural biological control of Bagrada hilaris by egg predators and parasitoids in north-central California

Cited by 7 publications

References 34 publications

Parasitism by Gryon aetherium (Hymenoptera: Scelionidae) on Bagrada hilaris (Hemiptera: Pentatomidae) eggs in northcentral California

Parasitism by Gryon aetherium (Hymenoptera: Scelionidae) on Bagrada hilaris (Hemiptera: Pentatomidae) eggs in northcentral California

Natural Enemies and Biological Control of Stink Bugs (Hemiptera: Heteroptera) in North America

Combined Activity of Natural Products and the Fungal Entomopathogen Cordyceps farinosa against Bagrada hilaris (Hemiptera: Pentatomidae)

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