Telenomus podisi

Ashmead, 1893

Telenomus podisi is an first described by William Harris Ashmead in 1893. It is a primary of (), with documented as its principal . The has been extensively studied for applications in soybean and other agricultural systems, particularly in Brazil. Laboratory studies demonstrate that females can form olfactory memories during development, with learned preferences persisting up to 72 hours post-. The species is susceptible to several including imidacloprid, which is lethal, while some products show greater selectivity.

T. podisi parasiting P maculiventris egg by Eirefred. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Telenomus podisi: //tɛˈlɛnəməs pəˈdiːsi//

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Identification

Telenomus podisi can be distinguished from related by its associations and morphological features typical of the Telenomus. It is smaller than Trissolcus that parasitize similar hosts. Identification to species level requires examination of with 10 (, , and 8 in females), patterns, and genitalic structures. Molecular markers may be necessary to separate from cryptic species within the Telenomus genus complex.

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Habitat

Agricultural fields, particularly soybean ; associated with herbaceous plants where hosts occur. Studies indicate partitioning with related , with T. podisi more abundant on compared to .

Distribution

South America, primarily Brazil. GBIF records indicate presence in multiple Brazilian states including Distrito Federal, Goiás, Maranhão, Minas Gerais, Mato Grosso do Sul, Mato Grosso, Pará, Pernambuco, Piauí, Paraná, Rio Grande do Sul, Santa Catarina, and São Paulo.

Host Associations

Euschistus heros - primary ; principal for and maintenance
Cosmopepla lintneriana - laboratory Can be reared on in laboratory conditions
Podisus maculiventris - laboratory ; used for laboratory rearing
Euschistus servus - laboratory ; laboratory rearing documented
Tibraca limbativentris - Rice ; cited from literature
Nezara viridula - ; cited from literature
Acrosternum aseadum - Cited from literature
Diceraeus melacanthus - laboratory Used in quality assessment studies

Life Cycle

with development occurring entirely within eggs. development from to approximately 12 days under laboratory conditions (26°C, 65% RH, 12-hour photophase). Females eggs within host eggs; feed internally, pupate, and emerge as adults. capability assessed as quality indicator for agents.

Behavior

Females demonstrate learning and memory formation during developmental stages. Exposure to lemongrass (Cymbopogon citratus) extract throughout phase alters chemotactic orientation, causing preferential orientation toward learned odors. This olfactory memory persists up to 72 hours post- but is lost by 96 hours. Inexperienced females show no innate preference for lemongrass over control solvents. and capacity monitored as indicators of foraging and potential in field conditions.

Ecological Role

Important agent of in agricultural . Acts as population regulator of pests, particularly in soybean agroecosystems. Contributes to services that reduce damage from stink bug feeding. Potential for integration into and programs.

Human Relevance

Significant agent for of in soybean and other . Mass rearing systems developed using , with production capacity of approximately 313,300 eggs per month from 35 rearing cages sufficient to colonize 35 hectares. Computational modeling indicates optimal release strategies involve 15,000 female parasitoids per hectare in 3-4 releases of 5,000+ individuals, with 25-meter spacing between release points. Susceptibility to requires careful selection to preserve ; ethiprole classified as harmless while imidacloprid is lethal.

Similar Taxa

Trissolcus basalisAlso an of ; distinguished by larger size and different range preferences
Trissolcus euschisti with overlapping range; shows partitioning with T. podisi between herbaceous and
Telenomus remusCongeneric used for control; differs in associations ( ) and geographic distribution
Trissolcus teretisRelated of ; differs in physiological susceptibility to