Telenomus podisi Parasitism on Dichelops melacanthus and Podisus nigrispinus Eggs at Different Temperatures

Taguti, Érica Ayumi; Gonçalves, Jaciara; Bueno, Adeney de Freitas; Marchioro, Suelhen Thais

doi:10.1653/024.102.0317

Cited by 7 publications

(6 citation statements)

References 37 publications

(30 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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“…Egg parasitoids are the most important natural enemies used as biological-control agents of pentatomid stink bugs (Pacheco and Corrêa-Ferreira 2000). The parasitoid wasp Telenomus podisi Ashmead, 1893 (Hymenoptera: Scelionidae) is most commonly used, due to its high parasitism capacity and control e cacy (Silva et al 2018;Taguti et al 2019;Bueno et al 2020a). This wasp occurs from midwestern to extreme southern Brazil, i.e., is adaptable to a range of climates (Torres et al 1997).…”

Section: Introductionmentioning

confidence: 99%

“…8 The parasitoid wasp Telenomus podisi Ashmead (Hymenoptera: Scelionidae) is most commonly used, due to its high parasitism capacity and control efficacy. [9][10][11] This wasp occurs from midwestern to extreme southern Brazil, i.e. is adaptable to a range of climates.…”

Section: Introductionmentioning

confidence: 99%

Release strategies of Telenomus podisi for control of Euschistus heros: a computational modeling approach

Weber

Garcia

Bueno

et al. 2022

Pest Management Science

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The egg-parasitoid wasp Telenomus podisi has received attention as a biological-control agent for one of the most important soybean pests in Brazil, the stink bug Euschistus heros. As yet, no studies have conclusively established strategies for the release of T. podisi. We developed a computational model employing cellular automata to investigate release strategies for T. podisi in soybean crops, in order to optimize the use of these wasps in managing E. heros. A computational model was developed, using cellular automata in the C programming language and assuming a two-dimensional grid of cells corresponding to a soybean eld. The biological dynamics of E. heros and T. podisi were programmed. The following parameters for release strategy were investigated: release mode, number of releases, number of parasitoids per hectare per release, and spacing between release points or strips. The sensitivities of the release and movement parameters were analyzed. The release strategies capable of maintaining an E. heros population below the Economic Threshold level involved releasing a total of at least 15,000 female parasitoids per hectare, in three or four releases of 5,000 or more. A 25-m spacing between release points or strips was indicated. The theoretical results produced by the computational model are expected to guide future eld studies to improve T. podisi release plans for managing E. heros in soybeans.

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“…According to the results, the inverse relationship between temperature and the duration of the egg–adult cycle can be explained by the low metabolic activity of the parasitoids when they are at low temperatures; thus, the development is completed at lower speed. Conversely, with the increase in temperature, metabolic activity increases and development is completed with faster speed, which can be an advantage for biological control since adults will appear earlier; however, this can have negative effects on the parasitism of natural enemies [ 19 ]. At very high temperatures, the ideal time of development of these biological agents is impaired and mortality increases [ 12 ].…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have been conducted with the parasitoid T. podisi to determine the ideal temperature for its creation and release in the field, including estimating the number of generations of this species [ 17 , 18 , 19 , 20 ], since this species is found in several agroecosystems, parasitizing the eggs of various Pentatomids, showing adaptation to different climatic conditions and hosts [ 21 ]. For the parasitoid O. submetallicus, no studies have been conducted yet regarding the ideal temperature for its creation and release in the field.…”

Section: Introductionmentioning

confidence: 99%

Thermal Requirements of Ooencyrtus submetallicus (Hym.: Encyrtidae) and Telenomus podisi (Hym.: Platygastridae) Parasitizing Euschistus heros Eggs (Hem.: Pentatomidae)

Chaves

Pereira

Torres

et al. 2021

Insects

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Temperature is one of the abiotic factors that strongly influences the biology and behavior of insects. In this study, we assessed the development of egg parasitoids Ooencyrtus submetallicus and Telenomus podisi parasitizing Euschistus heros eggs at different temperatures, and estimated the average number of generations for seven representative soybean-producing regions in Brazil. A comparative biology study was conducted, where the percentage of parasitism and emergence, life cycle duration (egg–adult), and longevity were found to be similar between O. submetallicus and T. podisi. The sex ratio and the number of individuals emerged from parasitized egg were higher in O. submetallicus in all regions. In the study of thermal requirements, temperatures of 16, 19, 22, 25, 28, 31, and 33 °C were tested. O. submetallicus and T. podisi developed at temperatures between 16 and 31 °C. The base temperature (Tb) for O. submetallicus and T. podisi was 9.3 and 6.7 °C, respectively; the thermal constant (K) was 336.9 and 272.7 degree-days, respectively. The estimated average number of annual generations of both parasitoids was higher than the host. O. submetallicus and T. podisi have the same ability to parasitize and develop in eggs of E. heros under the conditions studied. Both parasitoids exhibited satisfactory development and parasitism at temperatures between 19 and 31 °C. The development of both parasitoids was faster than their host, and the number of generations was higher for the seven studied localities.

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Telenomus podisi Parasitism on Dichelops melacanthus and Podisus nigrispinus Eggs at Different Temperatures

Cited by 7 publications

References 37 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

Release strategies of Telenomus podisi for control of Euschistus heros: a computational modeling approach

Thermal Requirements of Ooencyrtus submetallicus (Hym.: Encyrtidae) and Telenomus podisi (Hym.: Platygastridae) Parasitizing Euschistus heros Eggs (Hem.: Pentatomidae)

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