Aarhus University Seal

Temperature Affects Biological Control Efficacy: A Microcosm Study of Trichogramma achaeae

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Standard

Temperature Affects Biological Control Efficacy : A Microcosm Study of Trichogramma achaeae. / Chen, Long; Enkegaard, Annie; Sørensen, Jesper Givskov.

In: Insects, Vol. 12, No. 2, 95, 01.2021.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

APA

CBE

MLA

Vancouver

Chen L, Enkegaard A, Sørensen JG. Temperature Affects Biological Control Efficacy: A Microcosm Study of Trichogramma achaeae. Insects. 2021 Jan;12(2):95. Epub 2021. doi: 10.3390/insects12020095

Author

Bibtex

@article{c78efcb023fc47a497c97ef2e0dee997,
title = "Temperature Affects Biological Control Efficacy: A Microcosm Study of Trichogramma achaeae",
abstract = "Current quality control of mass-reared biological control agents (BCAs) is usually performed in the laboratory and often fails to include behavioural aspects of the BCAs. As a result, the use of efficacy measurements determined solely under laboratory conditions to predict field efficacy can be questioned. In this study, microcosms were designed to estimate biological control efficacy (realised parasitisation efficiency) of Trichogramma achaeae Nagaraja and Nagarkatti (Hymenoptera: Trichogrammatidae) parasitising Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) eggs across the operational temperature range (15–30 °C). Temperature greatly affected the success of females in finding and parasitising E. kuehniella eggs, with parasitisation being reduced at 15 and 20 °C, as both the percentage of parasitised host eggs and the percentage of leaves per plant with parasitised host eggs decreased sharply compared with higher temperatures. Graphing previous data on laboratory fecundity against parasitisation efficiency shows that the laboratory-measured fecundity of T. achaeae was unlikely to predict field efficacy across temperatures. Results also showed that leaf side had no effect on the preference of T. achaeae in parasitising E. kuehniella eggs; however, T. achaeae preferred to lay their eggs on the top tier of plants. These findings suggest that more complex assays, which include behavioural responses, might be developed for optimised quality control of BCAs intended for field application.",
keywords = "fecundity, oviposition strategy, parasitisation, quality, thermal biology",
author = "Long Chen and Annie Enkegaard and S{\o}rensen, {Jesper Givskov}",
year = "2021",
month = jan,
doi = "10.3390/insects12020095",
language = "English",
volume = "12",
journal = "Insects",
issn = "2075-4450",
publisher = "M D P I AG",
number = "2",

}

RIS

TY - JOUR

T1 - Temperature Affects Biological Control Efficacy

T2 - A Microcosm Study of Trichogramma achaeae

AU - Chen, Long

AU - Enkegaard, Annie

AU - Sørensen, Jesper Givskov

PY - 2021/1

Y1 - 2021/1

N2 - Current quality control of mass-reared biological control agents (BCAs) is usually performed in the laboratory and often fails to include behavioural aspects of the BCAs. As a result, the use of efficacy measurements determined solely under laboratory conditions to predict field efficacy can be questioned. In this study, microcosms were designed to estimate biological control efficacy (realised parasitisation efficiency) of Trichogramma achaeae Nagaraja and Nagarkatti (Hymenoptera: Trichogrammatidae) parasitising Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) eggs across the operational temperature range (15–30 °C). Temperature greatly affected the success of females in finding and parasitising E. kuehniella eggs, with parasitisation being reduced at 15 and 20 °C, as both the percentage of parasitised host eggs and the percentage of leaves per plant with parasitised host eggs decreased sharply compared with higher temperatures. Graphing previous data on laboratory fecundity against parasitisation efficiency shows that the laboratory-measured fecundity of T. achaeae was unlikely to predict field efficacy across temperatures. Results also showed that leaf side had no effect on the preference of T. achaeae in parasitising E. kuehniella eggs; however, T. achaeae preferred to lay their eggs on the top tier of plants. These findings suggest that more complex assays, which include behavioural responses, might be developed for optimised quality control of BCAs intended for field application.

AB - Current quality control of mass-reared biological control agents (BCAs) is usually performed in the laboratory and often fails to include behavioural aspects of the BCAs. As a result, the use of efficacy measurements determined solely under laboratory conditions to predict field efficacy can be questioned. In this study, microcosms were designed to estimate biological control efficacy (realised parasitisation efficiency) of Trichogramma achaeae Nagaraja and Nagarkatti (Hymenoptera: Trichogrammatidae) parasitising Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) eggs across the operational temperature range (15–30 °C). Temperature greatly affected the success of females in finding and parasitising E. kuehniella eggs, with parasitisation being reduced at 15 and 20 °C, as both the percentage of parasitised host eggs and the percentage of leaves per plant with parasitised host eggs decreased sharply compared with higher temperatures. Graphing previous data on laboratory fecundity against parasitisation efficiency shows that the laboratory-measured fecundity of T. achaeae was unlikely to predict field efficacy across temperatures. Results also showed that leaf side had no effect on the preference of T. achaeae in parasitising E. kuehniella eggs; however, T. achaeae preferred to lay their eggs on the top tier of plants. These findings suggest that more complex assays, which include behavioural responses, might be developed for optimised quality control of BCAs intended for field application.

KW - fecundity

KW - oviposition strategy

KW - parasitisation

KW - quality

KW - thermal biology

UR - http://www.scopus.com/inward/record.url?scp=85099940106&partnerID=8YFLogxK

U2 - 10.3390/insects12020095

DO - 10.3390/insects12020095

M3 - Journal article

C2 - 33499426

VL - 12

JO - Insects

JF - Insects

SN - 2075-4450

IS - 2

M1 - 95

ER -