Biology of<i>Telenomus pachycoris</i>(Hymenoptera: Scelionidae), a Parasitoid of Eggs of<i>Pachycoris torridus</i>(Hemiptera: Scutelleridae): The Effects of Egg Age, Exposure Time, and Temperature

Filho, Raul da Cunha Borges; Nava, Dori Edson; Pratissoli, Dirceu; Polanczyk, Ricardo Antônio; Marangon, Ricardo Braun; Loiácono, Marta Susana

doi:10.1653/024.100.0238

Cited by 5 publications

(2 citation statements)

References 12 publications

(12 reference statements)

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“…Values of K , T min , T max , and T opt vary according to the type of host used, species of parasitoid, and adjusted model for the analyses, potentially relating our results to those of other studies [ 22 , 34 , 35 , 54 , 55 , 56 , 57 ]. Since T2 presented T min of 16 °C and was composed of a natural diet (little variety of ingredients) and cryopreserved eggs, the nutritional aspect of the eggs from this diet was potentially inferior compared to the other treatments, influencing T min .…”

Section: Discussionmentioning

confidence: 64%

Optimizing Mass Rearing of the Egg Parasitoid, Telenomus podisi, for Control of the Brown Stink Bug, Euschistus heros

Parra

Carvalho

Hoback

et al. 2023

Insects

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The parasitoid Telenomus podisi Ashmead, 1893 is used in biological control programs in Brazil against eggs of Euschistus heros (Fabricius, 1798), a key pest of soybean, Glycine max (L.) Merr. To optimize the mass production of parasitoids, artificial diets and storage of host eggs at low temperatures have been developed; however, direct comparisons of the effects of these conditions have not occurred. We assessed a double factorial arrangement composed of six treatments (fresh or cryopreserved E. heros eggs from adults fed on natural or two artificial diets). We evaluated the biological characteristics and parasitism capacity of T. podisi produced from these treatments across seven temperatures. The thermal range between 21 and 30 °C resulted in satisfactory daily parasitism in all treatments tested, with an inverse relationship between temperature and female survival. The best parasitoid biological parameters were found between 21 and 27 °C, where all tested diets supported T. podisi development, with the best results from artificial diets. Fresh eggs and those frozen in liquid nitrogen and stored at −196 °C until use supported parasitoid development. These results suggest that the best method to mass rear T. podisi is to use artificial diets to rear E. heros and store eggs until needed, and then rear parasitoids at 24 °C.

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Section: Discussionmentioning

confidence: 64%

Optimizing Mass Rearing of the Egg Parasitoid, Telenomus podisi, for Control of the Brown Stink Bug, Euschistus heros

Parra

Carvalho

Hoback

et al. 2023

Insects

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“…All of these differences affect not only parasitoid handling time and exploitation, but also host suitability to parasitism and parasitoid development (Cônsoli et al 1999). In addition, changes in the external characteristics of stink bug eggs may be related to a hardening of the chorion as embryonic development proceeds, limiting the penetration capacity of the T. podisi ovipositor (Pak et al 1986;Borges Filho et al 2017).…”

Section: Discussionmentioning

confidence: 99%

Effect of the Ages of Parasitoid and Host Eggs on Telenomus podisi (Hymenoptera: Platygastridae) Parasitism

et al. 2019

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This study investigates the influence of parasitoid age and egg age of the hosts Euschistus heros (Fabricius) and Dichelops melacanthus (Dallas) on parasitism of Telenomus podisi Ashmead. Six separate bioassays were conducted: parasitism on eggs of E. heros (bioassay 1) and D. melacanthus (bioassay 2) by T. podisi females of different age (1, 5, and 10 days old); parasitism by T. podisi on eggs of different age (1, 2, 3, 4, and 5 days of embryonic development) of the hosts E. heros (bioassay 3) and D. melacanthus (bioassay 4); preference of T. podisi females for eggs at different embryonic developmental stages (eggs of 1, 2, 3, 4, and 5 days) of the hosts E. heros (bioassay 5) and D. melacanthus (bioassay 6). The age of T. podisi females and their hosts affected parasitism on both E. heros and D. melacanthus eggs. Overall, the parasitism rate was higher in older than younger parasitoids, independent of the tested host species, and host eggs between 1 and 3 days old were similarly parasitized. Thus, in T. podisi mass rearing facilities, it is recommended to use older adults (5 to 10 days old) as mother wasps to increase parasitism on the offered eggs. In addition, when hosts are completely absent in the field, or climatic conditions are unfavorable for release, mass-reared adults can be kept in the laboratory (25°C) for up to 10 days for later release in the field without any impairment of their subsequent parasitism performance.

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Biological parameters of three Argentinian populations of Pseudapanteles dignus, a larval endoparasitoid of Tuta absoluta, at various temperatures

et al. 2022

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Biology ofTelenomus pachycoris(Hymenoptera: Scelionidae), a Parasitoid of Eggs ofPachycoris torridus(Hemiptera: Scutelleridae): The Effects of Egg Age, Exposure Time, and Temperature

Cited by 5 publications

References 12 publications

Optimizing Mass Rearing of the Egg Parasitoid, Telenomus podisi, for Control of the Brown Stink Bug, Euschistus heros

Optimizing Mass Rearing of the Egg Parasitoid, Telenomus podisi, for Control of the Brown Stink Bug, Euschistus heros

Effect of the Ages of Parasitoid and Host Eggs on Telenomus podisi (Hymenoptera: Platygastridae) Parasitism

Biological parameters of three Argentinian populations of Pseudapanteles dignus, a larval endoparasitoid of Tuta absoluta, at various temperatures

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