Performance of Trichogramma pintoi when parasitizing eggs of the oriental fruit moth Grapholita molesta

Guo, Xiaojun; Di, Ning; Chen, Xu; Zhu, Zhengyang; Zhang, Fan; Tang, Bin; Hirata, Dai; JinTang, Li; Guo, Rong; Wang, Su

doi:10.1127/entomologia/2019/0853

Cited by 13 publications

(11 citation statements)

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“…Older eggs of G. molesta required more total time to parasitize, largely because of increased duration of the oviposition stage. Host suitability for parasitism by Trichogramma species typically declines with increasing age of the host egg 37–39 . The extended duration of oviposition in older eggs likely reflects an increased difficulty in drilling through their harder chorions, as chorion physical structure and hardness have often been linked to host acceptance and suitability in Trichogramma species, 40 and are an important physical property determining the acceptability of artificial eggs 41 .…”

Section: Discussionmentioning

confidence: 99%

“…In our pear orchard, other important insect pests were pear psylla, Psylla chinensis Yang et Li (Hemiptera: Psyllidae), and the peach fruit moth, Carposina niponensis (Lepidoptera: Carposinidae), which also peaked in numbers around late August to early September. Further investigations of the impact of Trichogramma releases on other pests that are potential hosts is warranted and could help justify wasp releases in pear orchards 9,39 …”

Section: Discussionmentioning

confidence: 99%

“…Further investigations of the impact of Trichogramma releases on other pests that are potential hosts is warranted and could help justify wasp releases in pear orchards. 9,39…”

Section: Wileyonlinelibrarycom/journal/psmentioning

confidence: 99%

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Laboratory and field studies supporting augmentation biological control of oriental fruit moth, Grapholita molesta (Lepidoptera: Tortricidae), using Trichogramma dendrolimi (Hymenoptera: Trichogrammatidae)

Zhang

Tang

Fang

et al. 2021

Pest Management Science

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BACKGROUND Oriental fruit moth, Grapholita molesta (Busck) (Lepidoptera: Tortricidae) is a cosmopolitan pests of fruit trees in temperate regions. Control of G. molesta is challenging because larvae feed in concealed locations and have evolved resistance to many pesticides. We compared three commercially available species of Trichogramma for efficacy against G. molesta in the laboratory assays and tested releases of the promising species in a pear orchard. RESULTS Laboratory assays indicated that Trichogramma dendrolimi parasitized G. molesta at the highest rate. Parasitoids took longer to oviposit in older host eggs, and fewer eggs were parasitized when they were more than 3 days old. Field tests produced ca 60% cumulative parasitism of sentinel G. molesta eggs with one release of Trichogramma dendrolimi, with most parasitism occurring within 24 h. Female wasps dispersed up to 12 m from release points with a bias toward upwind movement. CONCLUSION We calculated that, for each generation of G. molesta, 900 000 wasps per hectare, in three releases 3 days apart, each distributed among release points 10 m apart, would reduce fruit damage by half in an orchard where 50% of fruit would otherwise be damaged. Although augmentation of Trichogramma dendrolimi is a viable tactic for reducing G. molesta populations and fruit damage, it will require integration with other compatible control tactics in order to provide commercially acceptable levels of control in orchards experiencing significant pest pressure. © 2021 Society of Chemical Industry

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Laboratory and field studies supporting augmentation biological control of oriental fruit moth, Grapholita molesta (Lepidoptera: Tortricidae), using Trichogramma dendrolimi (Hymenoptera: Trichogrammatidae)

Zhang

Tang

Fang

et al. 2021

Pest Management Science

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“…Alternatively, biological control agents have the potential to reduce crop losses and the use of insecticides [ 13 – 16 ]. Of the various bioagents, the family Trichogrammatidae (Order: Hymenoptera) has few successful biological control agents for agricultural and forest pests [ 17 , 18 ], the most important genus under the family being Trichogramma [ 19 ]. Several Trichogramma species are widely used commercially to control lepidopteran pests on economically important crops [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Performance of Trichogramma japonicum under field conditions as a function of the factitious host species used for mass rearing

et al. 2021

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Different factitious hosts were used to mass rear Trichogramma japonicum Ashmead in different parts of the globe because thorough details were lacking in both the laboratory and the field. The objective of this study was to compare, parasitoid, T. japonicum reared in different factitious hosts. Three commonly used factitious host eggs, Corcyra cephalonica (Stainton), Ephestia kuehniella Zeller and Sitotroga cerealella Olivier were tested under laboratory conditions and then in the field over a yellow stem borer, Scirpophaga incertulus (Walker) of rice. The highest parasitism by T. japonicum was observed on E. kuehniella eggs. The parasitoid’s highest emergence (88.99%) was observed on S. cerealella eggs at 24 h exposure, whereas at 48 h it was on E. kuehniella eggs (94.66%). Trichogramma japonicum females that emerged from E. kuehniella eggs were significantly long-lived. The days of oviposition by hosts and the host species were significant individually, but not their interaction. Higher proportions of flying T. japonicum were observed when reared on E. kuehniella and C. cephalonica eggs. Field results showed that T. japonicum mass-reared on E. kuehniella showed higher parasitism of its natural host, S. incertulus eggs. Hence, by considering these biological characteristics and field results, E. kuehniella could be leveraged for the mass rearing of quality parasitoids of T. japonicum in India, the Asian continent and beyond.

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“…The genus Trichogramma is endoparasitoid of insect eggs and there are approximately 650 species of egg parasitoids worldwide, of which more than 200 species can parasitize the eggs of crop and forest pests [16]. Successful control in the field has been reported in several countries using Trichogramma against the European corn borer, Ostrinia nubilalis (Hübner) [17], the polyphagous grapevine moth, Lobesia botrana [18], cabbage pests [19,20], Tuta absoluta on tomato [21][22][23], and the oriental fruit moth Grapholita molesta [24].…”

Section: Introductionmentioning

confidence: 99%

Suitability of Chinese oak silkworm eggs for the multigenerational rearing of the parasitoid Trichogramma leucaniae

Wen

Hou

et al. 2020

PLoS ONE

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Trichogramma leucaniae is believed to be an efficient biological control agent for controlling the soybean pod borer [SPB; Leguminivora glycinivorella]. The large eggs of Chinese oak silkworm, Antheraea pernyi, are one of the best alternative host for mass production of Trichogramma. However, they are considered poor host for the growth and development of T. leucaniae. Here, we determine the feasibility of successive rearings of T. leucaniae on the large eggs for eight generations and evaluated their capacity of parasitizing SPB eggs of different ages. In the first four generations, the suitability of T. leucaniae reared on large eggs exhibited a significant increasing tendency and then decreased with the successive generations thereafter. The percentage of parasitized eggs and number of emerged adults per egg were increased from 40.0% and 10.8 adults/egg in F1 generation to 86.7% and 36.4 adults/egg in F4 generation respectively. In addition, T. leucaniae reared on A. pernyi for four generations significantly parasitized more SPB eggs regardless of egg age compared with those reared on Corcyra cephalonica eggs. These results provided useful information on the feasibility of mass production of T. leucaniae by reared for successive generations on A. pernyi large eggs.

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Performance of Trichogramma pintoi when parasitizing eggs of the oriental fruit moth Grapholita molesta

Cited by 13 publications

References 0 publications

Laboratory and field studies supporting augmentation biological control of oriental fruit moth, Grapholita molesta (Lepidoptera: Tortricidae), using Trichogramma dendrolimi (Hymenoptera: Trichogrammatidae)

Laboratory and field studies supporting augmentation biological control of oriental fruit moth, Grapholita molesta (Lepidoptera: Tortricidae), using Trichogramma dendrolimi (Hymenoptera: Trichogrammatidae)

Performance of Trichogramma japonicum under field conditions as a function of the factitious host species used for mass rearing

Suitability of Chinese oak silkworm eggs for the multigenerational rearing of the parasitoid Trichogramma leucaniae

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