Effects of temperature and superparasitism on quality and characteristics of thelytokous Wolbachia-infected Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) during mass rearing

Zhou, Jin‐Cheng; Li, Yuanyuan; Liu, Quan‐Quan; Ning, Su-fang; Che, Wunan; Cong, Bin; Dong, Hui

doi:10.1038/s41598-019-54719-5

Cited by 14 publications

(27 citation statements)

References 58 publications

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“…Therefore, it can be imagined that in the competition experiment, some of the W + offspring were produced by W – mothers and acquired Wolbachia while feeding with/on a W + larva within the same mealybug. Indeed, Wolbachia was recently shown to increase superparasitation behavior, while reducing the overall fitness of its parasitoid host in a mass‐rearing facility 77 . Interestingly, both W + and W – had much higher lifetime fecundity (54.5 and 63.2 offspring, respectively) than what has been previously reported (a maximum of less than 40; summarized in Suma et al 78 …”

Section: Discussionmentioning

confidence: 91%

Wolbachia influence on the fitness of Anagyrus vladimiri (Hymenoptera: Encyrtidae), a bio‐control agent of mealybugs

Izraeli

Lalzar

Netanel

et al. 2020

Pest Management Science

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BACKGROUND Like numerous other animals, biocontrol agents (BCAs) of arthropod pests carry various microorganisms that may have diverse effects on the biology of their eukaryote hosts. We postulated that it is possible to improve the efficacy of BCAs by manipulating the composition of their associated microbiota. The parasitoid wasp Anagyrus vladimiri (Hymenoptera: Encyrtidae) from a mass‐rearing facility was chosen for testing this hypothesis. RESULTS High‐throughput sequencing analysis indicated that fungal abundance in A. vladimiri was low and variable, whereas the bacterial community was dominated by the endosymbiont Wolbachia. Wolbachia was fixed in the mass‐rearing population, whereas in field‐collected A. vladimiri Wolbachia's prevalence was only approximately 20%. Identification of Wolbachia strains from the two populations by Multi Locus Sequence Typing, revealed two closely related but unique strains. A series of bioassays with the mass‐rearing Wolbachia‐fixed (W+) and a derived antibiotic‐treated Wolbachia‐free (W–) lines revealed that: (i) Wolbachia does not induce reproductive manipulations; (ii) W– females have higher fecundity when reared individually, but not when reared with conspecifics; (iii) W+ females outcompete W– when they share hosts for oviposition; (iv) longevity and developmental time were similar in both lines. CONCLUSIONS The findings suggest that W+ A. vladimiri have no clear fitness benefit under mass‐rearing conditions and may be disadvantageous under lab‐controlled conditions. In a broader view, the results suggest that augmentative biological control can benefit from manipulation of the microbiome of natural enemies.

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Section: Discussionmentioning

confidence: 91%

Wolbachia influence on the fitness of Anagyrus vladimiri (Hymenoptera: Encyrtidae), a bio‐control agent of mealybugs

Izraeli

Lalzar

Netanel

et al. 2020

Pest Management Science

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“…Nevertheless, our previous studies and others indicated that infected Trichogramma females show a higher probability of superparasitism, which parasitoid females lay a second clutch of eggs on a host that has been parasitised by the same species (Harvey et al, 2013;Farahani et al, 2015;Huang et al, 2017a;Liu et al, 2018;Zhou et al, 2019b). According to Lack's hypothesis as applied to gregarious parasitoids by Lack (1947) and Charnov and Skinner (1984), parasitoid females always allocate an optimal clutch size to a host to maximize offspring fitness.…”

Section: Introductionmentioning

confidence: 93%

“…Considering these two opposite hypotheses, an important question that should be tested arises: is the effect of Wolbachia on the fitness of Trichogramma offspring positive or negative in superparasitised hosts? Although previous studies have shown that Trichogramma infected by Wolbachia have higher probability for superparasitism (Huigens et al, 2004b;Farahani et al, 2015;Zhou et al, 2019bZhou et al, , 2020, the fate of Trichogramma offspring in the superparasitised host is still unknown.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Thelytokous Parthenogenesis-Inducing Wolbachia on the Fitness of Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) in Superparasitised and Single-Parasitised Hosts

et al. 2021

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Thelytokous Wolbachia-infected Trichogramma species have long been considered as biological control agents against lepidopteran pests in agriculture and forestry. Wolbachia has been suggested to increase the probability of the superparasitism of Trichogramma, but the fate of infected offspring in the superparasitised host is still unknown. The present study aimed to evaluate the fitness of thelytokous Wolbachia-infected (TDW) and bisexual Wolbachia-free (TD) Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) lines in superparasitised or single-parasitised hosts. The results showed that irrespective of whether Trichogramma wasps were developed from superparasitised or single-parasitised hosts, the TDW line was characterized by reduced fitness, including lower fecundity, shorter longevity, and smaller body size of F1 offspring, and lower emergence rate of F2 offspring than the TD line. This was not true for the survival rate and developmental time of F1 offspring. Additionally, the fitness parameters of T. dendrolimi that developed from superparasitised hosts were lower compared with that of T. dendrolimi that developed from single-parasitised hosts. Interestingly, Wolbachia-infected females had higher dispersal capacity than bisexual females when they developed from superparasitised hosts. The results indicated that Wolbachia negatively affects fitness of T. dendrolimi, but enhance dispersal capacity of T. dendrolimi females in superparasitism condition. Further studies need to be carried out to select the best line that will allow Wolbachia and their host Trichogramma to be better adapted to one another.

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“…Intraspeci c competition may occur when the female wasp deposits a second clutch of eggs on a host that has been parasitized by the same parasitoid species. This is termed "superparasitism" (Van Alphen and Visser 1990; Zhou et al 2019b).…”

Section: Introductionmentioning

confidence: 99%

Effects of Wolbachia Infection, Parasitic Order, And Time Interval On The Outcome of Inter-Strain Intrinsic Competition Between Bisexual Strain And Wolbachia-Induced Thelytokous Strain of Egg Parasitoid, Trichogramma Dendrolimi

Zhou

Dan

Liu

et al. 2022

Preprint

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Parasitoids may deposit a second clutch of eggs on a host that has been parasitized by the same parasitoid species. This is termed “superparasitism”. Wolbachia infection increases the superparasitism frequency of Trichogramma females. We investigated the outcome and fitness cost of inter-strain intrinsic competition between Wolbachia-infected thelytokous strain (TDW) and uninfected bisexual strain (TDB) of Trichogramma dendrolimi. To determine the developmental rate of both strains, the size of immature stages of T. dendrolimi offspring at different times after parasitization was measured in single parasitism and superparasitism conditions. The results showed increased superparasitism by Wolbachia-infected females compared to uninfected females, regardless of the time interval between oviposition; Trichogramma females were unable to distinguish between host eggs previously parasitized by TDB or TDW females. When the first oviposition was performed by TDB females, the TDB offspring outcompeted TDW offspring deposited later. However, although the TDW offspring was deposited 8 h earlier than the TDB offspring, it gained no advantage over TDB offspring. Regardless of parasitism conditions, the differences in development rate and time between TDW and TDB offspring were not significant. This study revealed that albeit TDW females presented a higher tendency of superparasitism than TDB females, TDB offspring outcompeted TDW offspring even when the latter was deposited 8 h earlier. The negative effects of Wolbachia infection on the competitive ability of TDW offspring inside the host eggs were due to offspring’s low fitness rather than delayed development.

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Effects of temperature and superparasitism on quality and characteristics of thelytokous Wolbachia-infected Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) during mass rearing

Cited by 14 publications

References 58 publications

Wolbachia influence on the fitness of Anagyrus vladimiri (Hymenoptera: Encyrtidae), a bio‐control agent of mealybugs

Wolbachia influence on the fitness of Anagyrus vladimiri (Hymenoptera: Encyrtidae), a bio‐control agent of mealybugs

Effects of Thelytokous Parthenogenesis-Inducing Wolbachia on the Fitness of Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) in Superparasitised and Single-Parasitised Hosts

Effects of Wolbachia Infection, Parasitic Order, And Time Interval On The Outcome of Inter-Strain Intrinsic Competition Between Bisexual Strain And Wolbachia-Induced Thelytokous Strain of Egg Parasitoid, Trichogramma Dendrolimi

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