Ratio-dependent competitions between a Wolbachia-uninfected bisexual strain and Wolbachia-infected thelytokous strain of the egg parasitoid, Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae)
Abstract Background Wolbachia-infected thelytokous Trichogramma wasps have been considered as potential effective biocontrol agents against lepidopteran pests in agriculture and forests. However, intra-specific competition may arise when Wolbachia-infected thelytokous Trichogramma coexist with their...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
CABI
2024-05-01
|
| Series: | CABI Agriculture and Bioscience |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s43170-024-00250-1 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832557418868899840 |
|---|---|
| author | Qian-Jin Dong Yue He Yu-Zhe Dong Wu-Nan Che Jin-Cheng Zhou Hui Dong |
| author_facet | Qian-Jin Dong Yue He Yu-Zhe Dong Wu-Nan Che Jin-Cheng Zhou Hui Dong |
| author_sort | Qian-Jin Dong |
| collection | DOAJ |
| description | Abstract Background Wolbachia-infected thelytokous Trichogramma wasps have been considered as potential effective biocontrol agents against lepidopteran pests in agriculture and forests. However, intra-specific competition may arise when Wolbachia-infected thelytokous Trichogramma coexist with their uninfected bisexual counterparts in fields or during mass-rearing procedures. This competition could potentially impact the efficacy of Trichogramma females in biological control programs. Results This study examined the parasitic capacities of bisexual (TdB) and Wolbachia-infected thelytokous (TdT) strains of Trichogramma dendrolimi as influenced by host density (ranging from 5 to 70 host eggs) and wasp density (two, four, and six females per arena). The experiments involved inter-strain competition between TdB and TdT strains (Inter-Td) as well as intra-strain competition within the TdT (Intra-TdT) or TdB (Intra-TdB) strains. Results revealed that females in the Inter-Td group exhibited a higher attack rate compared to those in the Intra-TdT and Intra-TdB groups, irrespective of wasp density. Specifically, when six females were present, the Inter-Td group showed significantly shorter host handling times than the Intra-TdT group. Within intra-strain cohorts, TdT females displayed a lower attack rate than TdB females when four or six females were present, and longer host handling times when six females were present. Mutual interference between individuals was not affected by competition types. Females of the Inter-Td group exhibited a higher probability of superparasitism than those of the Intra-TdB group or Inter-Td group. When both strains coexisted, the proportion of TdT offspring with six females was higher than that with two females or four females. Male ratios of bisexual offspring in Inter-Td groups were higher than those in Intra-TdB groups. The male ratio of bisexual offspring in the Inter-Td group increased with wasp density. Conclusions Our study highlights the negative impact of Wolbachia on parasitic capacity of Trichogramma females, increasing the likelihood of superparasitism. The coexistence of both strains enhances total parasitic efficacy, albeit resulting in a higher proportion of male offspring compared to scenarios with only uninfected females. The results will provide the reference for the usage of Wolbachia-infected thelytokous strain of T. dendrolimi in augmentative biological control programs. |
| format | Article |
| id | doaj-art-0a857ee3354f42ff82ed0b5a5cf4b609 |
| institution | Kabale University |
| issn | 2662-4044 |
| language | English |
| publishDate | 2024-05-01 |
| publisher | CABI |
| record_format | Article |
| series | CABI Agriculture and Bioscience |
| spelling | doaj-art-0a857ee3354f42ff82ed0b5a5cf4b6092025-02-03T04:57:47ZengCABICABI Agriculture and Bioscience2662-40442024-05-015111110.1186/s43170-024-00250-1Ratio-dependent competitions between a Wolbachia-uninfected bisexual strain and Wolbachia-infected thelytokous strain of the egg parasitoid, Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae)Qian-Jin Dong0Yue He1Yu-Zhe Dong2Wu-Nan Che3Jin-Cheng Zhou4Hui Dong5College of Plant Protection, Shenyang Agricultural UniversityCollege of Plant Protection, Shenyang Agricultural UniversityCollege of Plant Protection, Shenyang Agricultural UniversityCollege of Plant Protection, Shenyang Agricultural UniversityCollege of Plant Protection, Shenyang Agricultural UniversityCollege of Plant Protection, Shenyang Agricultural UniversityAbstract Background Wolbachia-infected thelytokous Trichogramma wasps have been considered as potential effective biocontrol agents against lepidopteran pests in agriculture and forests. However, intra-specific competition may arise when Wolbachia-infected thelytokous Trichogramma coexist with their uninfected bisexual counterparts in fields or during mass-rearing procedures. This competition could potentially impact the efficacy of Trichogramma females in biological control programs. Results This study examined the parasitic capacities of bisexual (TdB) and Wolbachia-infected thelytokous (TdT) strains of Trichogramma dendrolimi as influenced by host density (ranging from 5 to 70 host eggs) and wasp density (two, four, and six females per arena). The experiments involved inter-strain competition between TdB and TdT strains (Inter-Td) as well as intra-strain competition within the TdT (Intra-TdT) or TdB (Intra-TdB) strains. Results revealed that females in the Inter-Td group exhibited a higher attack rate compared to those in the Intra-TdT and Intra-TdB groups, irrespective of wasp density. Specifically, when six females were present, the Inter-Td group showed significantly shorter host handling times than the Intra-TdT group. Within intra-strain cohorts, TdT females displayed a lower attack rate than TdB females when four or six females were present, and longer host handling times when six females were present. Mutual interference between individuals was not affected by competition types. Females of the Inter-Td group exhibited a higher probability of superparasitism than those of the Intra-TdB group or Inter-Td group. When both strains coexisted, the proportion of TdT offspring with six females was higher than that with two females or four females. Male ratios of bisexual offspring in Inter-Td groups were higher than those in Intra-TdB groups. The male ratio of bisexual offspring in the Inter-Td group increased with wasp density. Conclusions Our study highlights the negative impact of Wolbachia on parasitic capacity of Trichogramma females, increasing the likelihood of superparasitism. The coexistence of both strains enhances total parasitic efficacy, albeit resulting in a higher proportion of male offspring compared to scenarios with only uninfected females. The results will provide the reference for the usage of Wolbachia-infected thelytokous strain of T. dendrolimi in augmentative biological control programs.https://doi.org/10.1186/s43170-024-00250-1Trichogramma dendrolimiThelytokousWolbachiaIntraspecific competitionParasitic efficacy |
| spellingShingle | Qian-Jin Dong Yue He Yu-Zhe Dong Wu-Nan Che Jin-Cheng Zhou Hui Dong Ratio-dependent competitions between a Wolbachia-uninfected bisexual strain and Wolbachia-infected thelytokous strain of the egg parasitoid, Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) CABI Agriculture and Bioscience Trichogramma dendrolimi Thelytokous Wolbachia Intraspecific competition Parasitic efficacy |
| title | Ratio-dependent competitions between a Wolbachia-uninfected bisexual strain and Wolbachia-infected thelytokous strain of the egg parasitoid, Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) |
| title_full | Ratio-dependent competitions between a Wolbachia-uninfected bisexual strain and Wolbachia-infected thelytokous strain of the egg parasitoid, Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) |
| title_fullStr | Ratio-dependent competitions between a Wolbachia-uninfected bisexual strain and Wolbachia-infected thelytokous strain of the egg parasitoid, Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) |
| title_full_unstemmed | Ratio-dependent competitions between a Wolbachia-uninfected bisexual strain and Wolbachia-infected thelytokous strain of the egg parasitoid, Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) |
| title_short | Ratio-dependent competitions between a Wolbachia-uninfected bisexual strain and Wolbachia-infected thelytokous strain of the egg parasitoid, Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) |
| title_sort | ratio dependent competitions between a wolbachia uninfected bisexual strain and wolbachia infected thelytokous strain of the egg parasitoid trichogramma dendrolimi matsumura hymenoptera trichogrammatidae |
| topic | Trichogramma dendrolimi Thelytokous Wolbachia Intraspecific competition Parasitic efficacy |
| url | https://doi.org/10.1186/s43170-024-00250-1 |
| work_keys_str_mv | AT qianjindong ratiodependentcompetitionsbetweenawolbachiauninfectedbisexualstrainandwolbachiainfectedthelytokousstrainoftheeggparasitoidtrichogrammadendrolimimatsumurahymenopteratrichogrammatidae AT yuehe ratiodependentcompetitionsbetweenawolbachiauninfectedbisexualstrainandwolbachiainfectedthelytokousstrainoftheeggparasitoidtrichogrammadendrolimimatsumurahymenopteratrichogrammatidae AT yuzhedong ratiodependentcompetitionsbetweenawolbachiauninfectedbisexualstrainandwolbachiainfectedthelytokousstrainoftheeggparasitoidtrichogrammadendrolimimatsumurahymenopteratrichogrammatidae AT wunanche ratiodependentcompetitionsbetweenawolbachiauninfectedbisexualstrainandwolbachiainfectedthelytokousstrainoftheeggparasitoidtrichogrammadendrolimimatsumurahymenopteratrichogrammatidae AT jinchengzhou ratiodependentcompetitionsbetweenawolbachiauninfectedbisexualstrainandwolbachiainfectedthelytokousstrainoftheeggparasitoidtrichogrammadendrolimimatsumurahymenopteratrichogrammatidae AT huidong ratiodependentcompetitionsbetweenawolbachiauninfectedbisexualstrainandwolbachiainfectedthelytokousstrainoftheeggparasitoidtrichogrammadendrolimimatsumurahymenopteratrichogrammatidae |