Factors influencing supercooling capacity of the koinobiont endoparasitoid <i>Venturia canescens</i> (Hymenoptera: Ichneumonidae)

Andreadis, Stefanos S.; Spanoudis, Christos G.; Athanassiou, Christos G.; Savopoulou-Soultani, Μ.

doi:10.1002/ps.3619

Cited by 17 publications

(12 citation statements)

References 25 publications

(33 reference statements)

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“…This direct response to non-suitable environmental conditions, and the subsequent response with the return of the favorable conditions, i.e. increase of temperature and host availability, may mostly suggest quiescence rather than diapause [8,38,39]. Andreadis et al [39] found that the parasitoid was generally more susceptible than the host while following a similar protocol with low temperature or the exposure of the endoparasitoid Venturia canescens (Gravenhorst) (Hymenoptera: Ichneumonidae) on larvae of the Mediterranean flour moth, Ephestia kuehniella Zeller (Lepipdoptera: Pyralidae).…”

Section: Discussionmentioning

confidence: 99%

“…However, Cagnotti et al [38] reported that Trichogramma nerudai Pintureau (Hymenoptera: Trichogrammatidae) prepupae, that had been stored at suboptimal temperature were not affected when the storage was 10 or 20d. In this context, preconditioning may play a positive role [38,39].…”

Section: Discussionmentioning

confidence: 99%

“…increase of temperature and host availability, may mostly suggest quiescence rather than diapause [8,38,39]. Andreadis et al [39] found that the parasitoid was generally more susceptible than the host while following a similar protocol with low temperature or the exposure of the endoparasitoid Venturia canescens (Gravenhorst) (Hymenoptera: Ichneumonidae) on larvae of the Mediterranean flour moth, Ephestia kuehniella Zeller (Lepipdoptera: Pyralidae). However, in that study, the age of the parasitoid played a critical role in its survival after exposure to low temperature, which can be taken into account to reduce mortality in cases of low temperature parasitoid preservation [35].…”

Section: Discussionmentioning

confidence: 99%

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Low temperature induced quiescence in parasitoids Trichogramma evanescens Westwood and Trichogramma chilonis Ishii reared on Plodia interpunctella (Hübner): Its utilization as quality control for mass rearing

Hasan

Parvin

Athanassiou

2022

Preprint

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Egg parasitoid, Trichogramma spp. is an important potential biological control agent for wide range of lepidopteran pests. Cold storage of host eggs has been proposed as a valuable technique for ensuring the release of sufficient parasitoid numbers whenever it is needed. Thus, the impact of low temperatures to induce quiescence in Trichogramma evanescens and Trichogramma chilonis was studied using eggs of Plodia interpunctella as hosts. Prepupae of the parasitoids Trichogramma evanescens and T.chilonis were stored for 15, 30, 45, 60 and 75 d at 4°C, following a 7 d period of acclimation at 10°C. Both parasitoid species seem to survive unfavorable temperature conditions by entering a state of quiescence. Parasitism, adult emergence, female proportion relative to male and F1 adult emergence were not affected by cold storage in either parasitoid for up to 30 d of storage. Parasitized host eggs of P. interpunctella can be stored for up to 60 d at 4°C for both parasitoids, but there was no emergence at 75 d. Results clearly show that there are specific intervals of cold storage during which the parasitoids can remain unaffected for relatively long periods of time. Although we observed some adverse effect in longevity and parasitism rates, the technique described here can be further utilized in mass rearing strategies of egg parasitoids for relatively long periods that will allow shipment and application in biological control programs.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Low temperature induced quiescence in parasitoids Trichogramma evanescens Westwood and Trichogramma chilonis Ishii reared on Plodia interpunctella (Hübner): Its utilization as quality control for mass rearing

Hasan

Parvin

Athanassiou

2022

Preprint

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“…One of the major ways organisms protect themselves from sudden changes in their environment is through the phenotypic plasticity of physiological performance and tolerance of extremes [62]. Acclimation to low temperatures can improve the supercooling ability of insects [63,64]. Additionally, changes in the SCP with treatment or season can indicate biochemical or physiological changes, which may help increase survival [65].…”

Section: Discussionmentioning

confidence: 99%

Differential Response of Leafminer Flies Liriomyza trifolii (Burgess) and Liriomyza sativae (Blanchard) to Rapid Cold Hardening

Iqbal

Zhang

Chang

et al. 2021

Insects

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Rapid cold hardening (RCH) is a rapid and critical adaption of insects to sudden temperature changes but is often overlooked or underestimated as a component of survival. Thus, interspecific comparisons of RCH are needed to predict how phenotypes will adapt to temperature variability. RCH not only enhances cold survival but also protects against non-lethal cold injury by preserving essential functions such as locomotion, reproduction, and energy balance. This study investigated the difference in basal cold tolerance and RCH capacity of L. trifolii and L. sativae. In both species, the cold tolerance of pupae was significantly enhanced after short-term exposure to moderately cold temperatures. The effect of RCH last for 4 h in L. sativae but only 2 h in L. trifolii. Interestingly, L. trifolii adults had a RCH response but L. sativae adults failed to acclimate. Short-term acclimation also lowered the supercooling point significantly in the pupae of both species. Based on these results, we propose a hypothesis that these differences will eventually affect their competition in the context of climate change. This study also provides the basis for future metabolomic and transcriptomic studies that may ultimately uncover the underlying mechanisms of RCH and interspecific competition between L. trifolii and L. sativae.

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“…For the larval endoparasitoid Venturia canescens (Gravenhorst) (Hymenoptera: Ichneumonidae), Eliopoulos et al [ 47 ] noted that there was a critical egg maturation stage, which was directly related with viability and progeny production capacity. For the same species, Andreadis et al [ 48 ] found that cold tolerance was negatively correlated with parasitoid age. We are unaware if egg exposure to low temperatures increases their suitability for parasitism, in the same way that larval irradiation positively affects parasitism in moth larvae by H .…”

Section: Discussionmentioning

confidence: 99%

Cold storage-mediated rearing of Trichogramma evanescens Westwood on eggs of Plodia interpunctella (Hübner) and Galleria mellonella L.

et al. 2021

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The egg parasitoid Trichogramma evanescens Westwood is considered as an efficient biological control agent for managing several lepidopteran pests and it is widely distributed throughout the world. Mass rearing protocols of parasitoids that are currently in use in biocontrol programs require a meticulous quality control plan, in order to optimize their efficacy, but also their progeny production capacity. In this paper, the effect of different factors on the quality control in mass rearing of T. evenescens, using Plodia interpunctella (Hübner) and Galleria mellonella L. as host species, were investigated. The impact of egg agewas significant in the rates of parasitism, for both host species tested. Significantly highest percent of parasitoid emergence was noticed in two day-old eggs for both host species, while one day-old eggs day exhibited the maximum emergence when both species were used togetherin the same trials. Age-dependent storage egg preservation at either 4 or 9°C significantly influenced the parasitism percentages on both species. The highest parasitism percentage was recorded in two day-old G. mellonella eggs that are kept for 15 days at 9°C while the lower in one day-old P. interpunctella eggs for 60 d storage. Moreover, the highest parasitoid mortality was recorded in T. evanescens reared either on P. interpunctella or G. mellonella at 20°C. Rearing of the parasitoid on a mixture of eggs of both host species resulted in higher parasitism, but not always in higher rates of parasitoid emergence. The results of the present work provide useful information that can be further utilized in rearing protocols of T. evanescens.

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Factors influencing supercooling capacity of the koinobiont endoparasitoid Venturia canescens (Hymenoptera: Ichneumonidae)

Cited by 17 publications

References 25 publications

Low temperature induced quiescence in parasitoids Trichogramma evanescens Westwood and Trichogramma chilonis Ishii reared on Plodia interpunctella (Hübner): Its utilization as quality control for mass rearing

Low temperature induced quiescence in parasitoids Trichogramma evanescens Westwood and Trichogramma chilonis Ishii reared on Plodia interpunctella (Hübner): Its utilization as quality control for mass rearing

Differential Response of Leafminer Flies Liriomyza trifolii (Burgess) and Liriomyza sativae (Blanchard) to Rapid Cold Hardening

Cold storage-mediated rearing of Trichogramma evanescens Westwood on eggs of Plodia interpunctella (Hübner) and Galleria mellonella L.

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