Effect of the instar of the pear psyllid Cacopsylla pyri (Hemiptera: Psyllidae) on the behaviour and fitness of the parasitoid Trechnites insidiosus (Hymenoptera: Encyrtidae)

Improved methods of integrated pest management of the pear psyllid Cacopsylla pyri (L.), the primary pest of pear in Europe and North America, are needed. Trechnites insidiosus (Crawford) is the most abundant parasitoid of C. pyri in pear orchards, where it is present early in the psyllid infestatio...

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Autores principales:	Guillaume Jean LE GOFF, Jeremy BERTHE, Kévin TOUGERON, Benoit DOCHY, Olivier LEBBE, François RENOZ, Thierry HANCE
Formato:	article
Lenguaje:	EN
Publicado:	Institute of Entomology, Biology Centre, Czech Academy of Science 2021
Materias:	psyllidae cacopsylla pyri encyrtidae trechnites insidiosus parasitoid behaviour host instar locomotor activity host acceptance host suitability offspring quality pear orchards biological control Zoology QL1-991
Acceso en línea:	https://doaj.org/article/05f6207f17cb468fa49f9695269d72cb
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spelling	oai:doaj.org-article:05f6207f17cb468fa49f9695269d72cb2021-11-05T15:23:15ZEffect of the instar of the pear psyllid Cacopsylla pyri (Hemiptera: Psyllidae) on the behaviour and fitness of the parasitoid Trechnites insidiosus (Hymenoptera: Encyrtidae)1210-57591802-882910.14411/eje.2021.028https://doaj.org/article/05f6207f17cb468fa49f9695269d72cb2021-09-01T00:00:00Zhttps://www.eje.cz/artkey/eje-202101-0028_effect_of_the_instar_of_the_pear_psyllid_cacopsylla_pyri_hemiptera_psyllidae_on_the_behaviour_and_fitness_of.phphttps://doaj.org/toc/1210-5759https://doaj.org/toc/1802-8829Improved methods of integrated pest management of the pear psyllid Cacopsylla pyri (L.), the primary pest of pear in Europe and North America, are needed. Trechnites insidiosus (Crawford) is the most abundant parasitoid of C. pyri in pear orchards, where it is present early in the psyllid infestation period. However, little is known about its general biology, interaction with its host and potential as a control agent. The objective of this laboratory study was to evaluate the behaviour of a specialist parasitoid when presented with different larval instars of C. pyri, and assess the quality of the next generation of parasitoids. T. insidiosus was able to insert its ovipositor into all host instars. However, the fourth instar of the host appeared to be the most suitable in terms of behavioural acceptance, time spent walking, antennal activity and progeny development (mummy formation, development time and tibial length). In addition, we report a low frequency of host-feeding behaviour by this parasitoid. From a biological control perspective, we suggest that favouring T. insidiosus, either through mass releases or conservation of naturally present populations, when the first generation of psyllids reach the fourth instar, would maximize the chance of controlling psyllid populations in pear orchards.Guillaume Jean LE GOFFJeremy BERTHEKévin TOUGERONBenoit DOCHYOlivier LEBBEFrançois RENOZThierry HANCEInstitute of Entomology, Biology Centre, Czech Academy of Sciencearticlepsyllidaecacopsylla pyriencyrtidaetrechnites insidiosusparasitoidbehaviourhost instarlocomotor activityhost acceptancehost suitabilityoffspring qualitypear orchardsbiological controlZoologyQL1-991ENEuropean Journal of Entomology, Vol 118, Iss 1, Pp 279-287 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	psyllidae cacopsylla pyri encyrtidae trechnites insidiosus parasitoid behaviour host instar locomotor activity host acceptance host suitability offspring quality pear orchards biological control Zoology QL1-991
spellingShingle	psyllidae cacopsylla pyri encyrtidae trechnites insidiosus parasitoid behaviour host instar locomotor activity host acceptance host suitability offspring quality pear orchards biological control Zoology QL1-991 Guillaume Jean LE GOFF Jeremy BERTHE Kévin TOUGERON Benoit DOCHY Olivier LEBBE François RENOZ Thierry HANCE Effect of the instar of the pear psyllid Cacopsylla pyri (Hemiptera: Psyllidae) on the behaviour and fitness of the parasitoid Trechnites insidiosus (Hymenoptera: Encyrtidae)
description	Improved methods of integrated pest management of the pear psyllid Cacopsylla pyri (L.), the primary pest of pear in Europe and North America, are needed. Trechnites insidiosus (Crawford) is the most abundant parasitoid of C. pyri in pear orchards, where it is present early in the psyllid infestation period. However, little is known about its general biology, interaction with its host and potential as a control agent. The objective of this laboratory study was to evaluate the behaviour of a specialist parasitoid when presented with different larval instars of C. pyri, and assess the quality of the next generation of parasitoids. T. insidiosus was able to insert its ovipositor into all host instars. However, the fourth instar of the host appeared to be the most suitable in terms of behavioural acceptance, time spent walking, antennal activity and progeny development (mummy formation, development time and tibial length). In addition, we report a low frequency of host-feeding behaviour by this parasitoid. From a biological control perspective, we suggest that favouring T. insidiosus, either through mass releases or conservation of naturally present populations, when the first generation of psyllids reach the fourth instar, would maximize the chance of controlling psyllid populations in pear orchards.
format	article
author	Guillaume Jean LE GOFF Jeremy BERTHE Kévin TOUGERON Benoit DOCHY Olivier LEBBE François RENOZ Thierry HANCE
author_facet	Guillaume Jean LE GOFF Jeremy BERTHE Kévin TOUGERON Benoit DOCHY Olivier LEBBE François RENOZ Thierry HANCE
author_sort	Guillaume Jean LE GOFF
title	Effect of the instar of the pear psyllid Cacopsylla pyri (Hemiptera: Psyllidae) on the behaviour and fitness of the parasitoid Trechnites insidiosus (Hymenoptera: Encyrtidae)
title_short	Effect of the instar of the pear psyllid Cacopsylla pyri (Hemiptera: Psyllidae) on the behaviour and fitness of the parasitoid Trechnites insidiosus (Hymenoptera: Encyrtidae)
title_full	Effect of the instar of the pear psyllid Cacopsylla pyri (Hemiptera: Psyllidae) on the behaviour and fitness of the parasitoid Trechnites insidiosus (Hymenoptera: Encyrtidae)
title_fullStr	Effect of the instar of the pear psyllid Cacopsylla pyri (Hemiptera: Psyllidae) on the behaviour and fitness of the parasitoid Trechnites insidiosus (Hymenoptera: Encyrtidae)
title_full_unstemmed	Effect of the instar of the pear psyllid Cacopsylla pyri (Hemiptera: Psyllidae) on the behaviour and fitness of the parasitoid Trechnites insidiosus (Hymenoptera: Encyrtidae)
title_sort	effect of the instar of the pear psyllid cacopsylla pyri (hemiptera: psyllidae) on the behaviour and fitness of the parasitoid trechnites insidiosus (hymenoptera: encyrtidae)
publisher	Institute of Entomology, Biology Centre, Czech Academy of Science
publishDate	2021
url	https://doaj.org/article/05f6207f17cb468fa49f9695269d72cb
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Effect of the instar of the pear psyllid Cacopsylla pyri (Hemiptera: Psyllidae) on the behaviour and fitness of the parasitoid Trechnites insidiosus (Hymenoptera: Encyrtidae)

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