Parasitism byMeteorus rubens onAgrotis ipsilon as affected by supplementary food and kairomone, field studies

Zaki, F. N.; Awadallah, K. T.; Gesraha, M. A.

doi:10.1007/bf02119602

Cited by 6 publications

(5 citation statements)

References 7 publications

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“…Also, it agreed with Gesraha [15] in his work on the same parasitoids, that records nearly the same results. Also, these findings agreed with Zaki et al [17] that mentioned in their work on the same insects (M. rubens and A. ipsilon), they applied kairomone before releasing Meteorus rubens to increase its efficacy in parasitism from 16.70% at 0-time to reach 43.30% after 10 days of application.…”

Section: Population Dynamicssupporting

confidence: 91%

Meteorus gyrator (Thunberg) (Hymenoptera: Braconidae) In Egypt: Geographical Distribution and Mass-production

Gesraha

Ebeid

2020

AJOB

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Background: The larval internal parasitoids in the genus Meteorus attack certain lepidopterous larvae in different Egyptian fields. Two species, M. rubens and M. gyrator were the most abundant species reared from several lepidopterous larval species, which feed on different host plants in the two selected Governorates in Egypt throughout two successive years. Aim: This work presents a method specifically designed to improve the abundance and the parasitizing potential of M. gyrator in open fields to parasitize and develop on a broad range of noctuid’s pests by releasing considerable number of the parasitoid adults. Also it deals with some aspects of the basic biology of M. gyrator parasitizing Spodoptera littoralis and Autugrapha ni, as mass-rearing hosts. Methodology: 1- Population Dynamics Biweekly samples of lepidopterous larvae were collected from different host plants in the fields of Giza and Faiyum Governorates, for two successive years (November, 2017 to October, 2019). Collected larvae were confined individually under constant conditions until pupation or the emergence of the internal parasitoid’s larvae for pupation. 2- Laboratory Rearing Cultures of some insect larvae, Heliothis armigera, Spodoptera exigua, Agrotis ipsilon, Sesamia cretica, S. littoralis and Autographa ni were reared in laboratory under constant conditions to act as hosts for mass-production of the parasitoid, M. gyrator. Results: Obtained results reveal that A. ipsilon was the main host of M. rubens, it was more abundant in both years and localities of the survey. Meteorus gyrator was recorded at fewer numbers; it was reared from S. littoralis, S. exigua, S. critica, Heliothis spp. and Autographa spp. The parasitism percentage by M. rubens averaged 23.10% at Giza. While in the case of M. gyrator it averaged 3.25%. In Faiyum, the corresponding figure averaged 12.96% parasitism for M. rubens; while it averaged 6.93%, for M. gyrator. To increase the efficacy of M. gyrator, mass production experiments were carried out, suggesting that Autographa ni was the most suitable for mass-rearing than S. littoralis. Conclusion: To increase the efficacy of M. gyrator as an endoparasitoid, its numbers in the field should be increased by releasing a considerable number of adults, to control lepidopterous larval pests.

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Section: Population Dynamicssupporting

confidence: 91%

Meteorus gyrator (Thunberg) (Hymenoptera: Braconidae) In Egypt: Geographical Distribution and Mass-production

Gesraha

Ebeid

2020

AJOB

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“…On the other view, it was observed that M.gyrator preferred warmer temperatures than M.rubens for its maximum activity. The obtained results were matched with that reported [14,15,19,20,22].…”

Section: Discussionsupporting

confidence: 92%

“…Our findings were in accordance with those reported by other authors in their investigations on some lepidopteran larvae that were collected from different vegetables & crops in diverse zones of Egyptian fields, where they stated that the solitary parasitoid was common on S.littoralis, S.exigua, and Autographa spp. [14,15,19,20,22]. Because of the poor rate of M.gyrator abundance, and its wide parasitism range, mass rearing of adults was a solution for overcoming the shortage of its efficiency as an internal larval parasitoid.…”

Section: El-sharkia Governoratementioning

confidence: 99%

Maximizing the Role of the Internal Larval Parasitoid, Meteorus gyrator (Thunberg) in the Open Field as a Biological Control Agent Considering the Effects of Climatic Changes

Gesraha

Ebeid

Marei

et al. 2022

AJOB

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Background: Members of Braconidae, i.e., Meteorus spp. assault certain lepidopterous larvae in Egyptian fields. The recorded species M.rubens (gregarious) and M.gyrator (solitary) were the most species reared from some lepidopterous larvae attacking various host plants in two chosen Governorates in Egypt through two experimental years. This work aims to increase the parasitizing efficiency of M.gyrator in fields by releasing an impressive number of parasitoid adults. Methods: Samples of lepidopteran larvae were picked up from the prevailing plants in fields of El-Ghaebia and El-Sharkia Governorates, for two successive years (2020 to 2021). The prevailing plants are: clover, cabbage, okra, tomato, maize, jew's mallow, bean, soybean, cotton, pea, and lettuce. Collected larvae were reared under optimal conditions until their pupation or in anticipation of the migration of the full-grown endoparasitoid's larvae for pupation. Parasitoid’s production: Species of some lepidopterous larvae were reared in the NRC laboratory for large-scale manufacturing of the parasitoid Meteorus gyrator. Results: Acquired results uncover that Agrotis ipsilon was the primary noctuid host larvae of M. rubens during its abundant periods (February-May). While in case of M.gyrator it was recorded in fewer numbers (at its abundant periods, May-August); which was raised from other lepidopteran larvae. The M. rubens parasitism percentage reached 26.50 and 21.79% at El-Gharbia Governorate through the two experimental years, respectively; whereas in the case of M. gyrator it was 2.25% in the 2nd experimental year only. In El-Sharkia, M. rubens parasitism percentage was 18.60 and 28.60%, respectively throughout the two experimental years; while it was 10.00% for M. gyrator in the first year only. Conclusion: To boost the productivity of this solitary internal parasitoid as a bio-control agent, it is mandatory to increase its adults population in any field.

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“…The extracts of flower buds, flowers, and leaves of Tagetes erecta (L.) (Asterales: Asteraceae) attract Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) and its parasitoids, due to the presence of compounds containing benzaldehyde, (S)-(-)-limonene, (R,S)-(±)-linalool, (E)-myroxide, (Z)-b-ocimene, phenylacetaldehyde, and (R)-(-)-piperitone[62]. Interestingly, the combination of kairomones with molasses increased the parasitism of Agrotis ipsilon (Hufnagel) (Lepidoptera: Noctuidae) by Meteorus rubens (Nees Von Esenbeck) (Hymenoptera: Braconidae)[15,63]. Similarly, volatiles of symbiotic fungus (Cerrena unicolor (Bull.)…”

mentioning

confidence: 99%

A Review of Interactions between Insect Biological Control Agents and Semiochemicals

Sharma

Sandhi

Reddy

2019

Insects

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Biological control agents and semiochemicals have become essential parts of the integrated pest management of insect pests over recent years, as the incorporation of semiochemicals with natural enemies and entomopathogenic microbials has gained significance. The potential of insect pheromones to attract natural enemies has mainly been established under laboratory conditions, while semiochemicals from plants have been used to attract and retain natural enemies in field conditions using strategies such as trap crops and the push–pull mechanism. The best-known semiochemicals are those used for parasitoids–insect pest–plant host systems. Semiochemicals can also aid in the successful dispersal of entomopathogenic microbials. The use of semiochemicals to disseminate microbial pathogens is still at the initial stage, especially for bacterial and viral entomopathogens. Future studies should focus on the integration of semiochemicals into management strategies for insects, for which several semiochemical compounds have already been studied. More effective formulations of microbial agents, such as granular formulations of entomopathogenic fungi (EPFs), along with bio-degradable trap materials, could improve this strategy. Furthermore, more studies to evaluate species-specific tactics may be needed, especially where more than one key pest is present.

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Parasitism byMeteorus rubens onAgrotis ipsilon as affected by supplementary food and kairomone, field studies

Cited by 6 publications

References 7 publications

Meteorus gyrator (Thunberg) (Hymenoptera: Braconidae) In Egypt: Geographical Distribution and Mass-production

Meteorus gyrator (Thunberg) (Hymenoptera: Braconidae) In Egypt: Geographical Distribution and Mass-production

Maximizing the Role of the Internal Larval Parasitoid, Meteorus gyrator (Thunberg) in the Open Field as a Biological Control Agent Considering the Effects of Climatic Changes

A Review of Interactions between Insect Biological Control Agents and Semiochemicals

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