A Delayed Increase in the Population of an Imported Parasitoid, Torymus (Syntomaspis) sinensis (Hymenoptera: Torymidae) in Kumamoto, Southwestern Japan

Murakami, Yozo; Gyoutoku, Yutaka

doi:10.1303/aez.30.215

Cited by 16 publications

(8 citation statements)

References 7 publications

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“…Thus, before considering biological control programs with T. sinensis, a preliminary survey of ACGW galls should be carried out to verify the presence and the abundance of parasitoid species that, like the two mentioned above, may behave as hyperparasitoids. A high density of potential hyperparasitoids may hinder or even undermine biological control programs as it supposedly happened in some Japanese areas where T. sinensis efficacy was very low [4].…”

Section: Discussionmentioning

confidence: 99%

“…This strategy aims to reestablish the original hostantagonist association in the new area of distribution. However, native antagonists may also be able to play an important role in biological control, supplementing, for instance, the effect of the exotic antagonist [1,2], or they can hinder its establishment and, thus, its effectiveness [3][4][5]. For example, cynipid parasitoids attack both gall formers and inquilines found inside galls; in addition they may act as facultative hyperparasitoids, attacking other parasitoids [6], including the exotic antagonist [5,7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Population Dynamics of Native Parasitoids Associated with the Asian Chestnut Gall Wasp (Dryocosmus kuriphilus) in Italy

Panzavolta

Croci

Bracalini

et al. 2018

Psyche: A Journal of Entomology

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Native parasitoids may play an important role in biological control. They may either support or hinder the effectiveness of introduced nonnative parasitoids released for pest control purposes. Results of a three-year survey (2011–2013) of the Asian chestnut gall wasp (ACGW) Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae) populations and on parasitism rates by native indigenous parasitoids (a complex of chalcidoid hymenopterans) in Italian chestnut forests are given. Changes in D. kuriphilus gall size and phenology were observed through the three years of study. A total of 13 species of native parasitoids were recorded, accounting for fluctuating parasitism rates. This variability in parasitism rates over the three years was mainly due to the effect of Torymus flavipes (Walker) (Hymenoptera: Torymidae), which in 2011 accounted for 75% of all parasitoid specimens yet decreased drastically in the following years. This strong fluctuation may be related to climatic conditions. Besides, our data verified that parasitoids do not choose host galls based on their size, though when they do parasitize smaller ones, they exploit them better. Consequently, ACGWs have higher chances of surviving parasitism if they are inside larger galls.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Population Dynamics of Native Parasitoids Associated with the Asian Chestnut Gall Wasp (Dryocosmus kuriphilus) in Italy

Panzavolta

Croci

Bracalini

et al. 2018

Psyche: A Journal of Entomology

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“…As a result, the density of the host cynipid pest has not yet decreased but instead continues to fluctuate at too high a level. Two factors were suggested to have delayed the success of the introduced parasitoid: the low female sex ratio and high mortality rate due to native facultative hyperparasitoids (75,76 of P. vittata in the laboratory, indicating that biological control of this fly pest is a possibility (67). SAWFLIES Sometimes sawflies' primary parasitoids in Australia (127,128) and in Eurasia (87) are in turn attacked by facultative hyperparasitoids.…”

Section: Wasps and Beesmentioning

confidence: 99%

HYPERPARASITISM: Multitrophic Ecology and Behavior

Sullivan

Völkl

1999

Annu. Rev. Entomol.

211

193

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Hyperparasitoids are secondary insect parasitoids that develop at the expense of a primary parasitoid, thereby representing a highly evolved fourth trophic level. This review evaluates multitrophic relationships and hyperparasitoid ecology. First, hyperparasitoid communities of various taxa of phytophagous and predacious insects are described. Second, specific patterns of hyperparasitoid community organization and hyperparasitoid ecology are described in detail, using the aphid-parasitoid-hyperparasitoid food web as a model system. Aphid hyperparasitoid communities consist of ecto- and endohyperparasitoids, with ectohyperparasitoids being less host specific than endohyperparasitoids. Lifetime fecundity and intrinsic rate of increase of hyperparasitoids are generally lower than those of their primary hosts. Aphid ectohyperparasitoids search randomly for hosts and do not use specific cues, whereas endohyperparasitoids gain information that originates from host plants or hosts for long-range search. Interactions with adult primary parasitoids do not influence hyperparasitoid searches, but aphid-attending ants typically prevent successful hyperparasitoid foraging. Impact of hyperparasitism on biological control is reviewed.

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“…(Fagaceae)]. In its area of origin (China) and neighbouring countries (Japan, Korea), D. kuriphilus has resulted in massive reductions in the local yields of different species of chestnut [ Castanea mollissima Blume, Castanea henryi (Skan) (but see also Lu et al , 2012), Castanea crenata Siebold and Zuccarini] over the last five decades (Yasumatsu, 1951; Murakami et al , 1995; Abe et al , 2007; Fan & Zhu, 2010). In 1974, D. kuriphilus was recorded on a Chinese chestnut in the U.S.A. (Payne et al , 1975).…”

Section: Introductionmentioning

confidence: 99%

“…The efficiency of chemical control is further reduced by the difficulty of covering the entire foliage of the plants using ground‐based applicators as a result of the dimensions (height above 6 m) of the trees. Several studies have been conducted on natural enemies and on their role in the biological control of D. kuriphilus in Italy (Aebi et al , 2007; Quacchia et al , 2008, 2012; Santi & Maini, 2011), complementing the information available for Japan and the U.S.A. (Moriya et al , 1989; Murakami et al , 1995; Cooper & Rieske, 2007, 2011).…”

Section: Introductionmentioning

confidence: 99%

Biology and monitoring of Dryocosmus kuriphilus on Castanea sativa in Southern Italy

Bernardo¹,

Iodice²,

Sasso

et al. 2012

Agri and Forest Entomology

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1 The cynipid gall wasp Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae) is an invasive wasp in Europe and is one of the major pests of chestnuts worldwide. An investigation of this cynipid was started in Campania, Southern Italy, in 2008, with the aim of providing guidelines for its sustainable control. 2 The number of larvae/gall increased in the second year of colonization relative to the first one but thereafter decreased in the third year of colonization, whereas the volume of the galls after the initial increase in the second year of colonization became stable. Adult emergence generally peaked between the middle of June and July. 3 The only reliable method for assessing the presence of the pest at its earliest stage was through dissecting the buds because oviposition scars on the buds tended to disappear during the winter. 4 Yellow traps were shown to be an effective method for assessing the emergence of cynipid adults and could potentially be used to time chemical applications in those cases in which this control method is feasible. 5 No correlation was recorded between the relative durations of the final stages (pupae, pharate adults and emergence). 6 Possible control strategies for this invasive pest are discussed.

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A Delayed Increase in the Population of an Imported Parasitoid, Torymus (Syntomaspis) sinensis (Hymenoptera: Torymidae) in Kumamoto, Southwestern Japan

Cited by 16 publications

References 7 publications

Population Dynamics of Native Parasitoids Associated with the Asian Chestnut Gall Wasp (Dryocosmus kuriphilus) in Italy

Population Dynamics of Native Parasitoids Associated with the Asian Chestnut Gall Wasp (Dryocosmus kuriphilus) in Italy

HYPERPARASITISM: Multitrophic Ecology and Behavior

Biology and monitoring of Dryocosmus kuriphilus on Castanea sativa in Southern Italy

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