&lt;b&gt;Parasitism capacity of &lt;i&gt;Trichogramma pretiosum&lt;/i&gt; on eggs of &lt;i&gt;Trichoplusia ni&lt;/i&gt; at different temperatures

Carvalho, José Romário de; Pratissoli, Dirceu; Dalvi, Leandro Pin; Silva, Marcos Américo; Bueno, Regiane Cristina Oliveira de Freitas; Bueno, Adeney de Freitas

doi:10.4025/actasciagron.v36i4.17217

Cited by 9 publications

(9 citation statements)

References 38 publications

(37 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…bras., Brasília, v.52, n.11, p.961-968, nov. 2017 DOI: 10.1590/S0100-204X2017001100001 complete development of the parasitoid decreased as the temperature increased. The development may affect the suitability of the parasitoid, as well as the handling and foraging time, interfering with the host behavior of searching (Carvalho et al, 2014;.…”

Section: Resultsmentioning

confidence: 99%

Biological parameters and thermal requirements of Trichogramma pretiosum reared on Helicoverpa armigera eggs

Carvalho

Silva

Reis

et al. 2017

Pesq. agropec. bras.

View full text Add to dashboard Cite

-The objective of this work was to determine the biological parameters and thermal requirements of Trichogramma pretiosum TM strain reared on Helicoverpa armigera eggs. A card containing 20 eggs of H. armigera was offered for each T. pretiosum female, at temperatures of 18, 20, 22, 25, 28, 30 and 32°C. All life stages of T. pretiosum were observed under the given temperature conditions. The optimum temperature for the parasitism of T. pretiosum was 25°C, and the highest longevity was found at the same temperature. The highest parasitoid emergence rates occurred at temperatures of 22, 25 and 28°C. The highest proportion of T. pretiosum individuals emerged per egg was observed at 18°C. Concerning the sex ratio, the highest proportion of females occurred at 28°C, and the highest percentage of parasitism viability was observed at this same temperature. The lowest thermal threshold for total preimaginal development and thermal requirements of T. pretiosum were 10.82°C and 134.55 degree-days, respectively. The estimated number of generations of T. pretiosum in the average temperatures of municipality of Bom Jesus, state of Piauí, Brazil is four per month.Index terms: Trichogrammatidae, biological control, parasitoid, temperature. Parâmetros biológicos e exigências térmicas de Trichogramma pretiosum sobre ovos de Helicoverpa armigera Resumo -O objetivo deste trabalho foi determinar os parâmetros biológicos e as exigências térmicas deTrichogramma pretiosum linhagem TM sobre ovos de Helicoverpa armigera. Para cada fêmea, foi oferecida uma cartela contendo 20 ovos de H. armigera, às temperaturas de 18, 20, 22, 25, 28, 30 e 32°C. Todos os estádios de vida de T. pretiosum foram observados sob as dadas condições de temperatura. A temperatura ótima para o parasitismo de T. pretiosum foi de 25°C e a maior longevidade foi verificada à mesma temperatura. As maiores taxas de emergência do parasitoide foram às temperaturas de 22, 25 e 28°C. A maior proporção de indivíduos de T. pretiosum emergidos por ovo foi observada a 18°C. Quanto à razão sexual, a maior proporção de fêmeas ocorreu a 28°C, e o maior percentual de viabilidade do parasitismo foi observado à mesma temperatura. O limiar térmico inferior para o desenvolvimento pré-imaginal total e as exigências térmicas de T. pretiosum foram de 10,82°C e 134,55 grau-dias, respectivamente. O número estimado de gerações de T. pretiosum às temperaturas médias do Município de Bom Jesus, Piauí, foi de 4 por mês.Termos para indexação: Trichogrammatidae, controle biológico, parasitoide, temperatura.

show abstract

Section: Resultsmentioning

confidence: 99%

Biological parameters and thermal requirements of Trichogramma pretiosum reared on Helicoverpa armigera eggs

Carvalho

Silva

Reis

et al. 2017

Pesq. agropec. bras.

View full text Add to dashboard Cite

show abstract

“…It can also infest host plants as cotton, soybean, tomato, and potato, which are of economic importance (Capinera, 2014). An efficient alternative of biological control is to release Trichogramma parasitoids (Hymenoptera: Trichogrammatidae) against Trichoplusia ni (Carvalho et al, 2014). These parasitoids are one of the most important biotic agents, and are widely distributed around the world parasitizing eggs of more than 200 species of insects (Jalali, 2013).…”

mentioning

confidence: 99%

“…The functional response is significantly affected by various factors such as host, age, and exposure time of the host to the parasitoid (Nikbin et al, 2014). Temperature exerts a great influence on parasitoid development and behavior (Carvalho et al, 2014), as well as on the functional response of these natural enemies (Nikbin et al, 2014). Studies that had determined the required proportion of Trichoplusia ni eggs parasitized by Trichogramma pretiosum (Riley, 1879) females, at different temperatures, could offer useful data on the population dynamics, which are relevant to the enforcement of biological control programs.…”

mentioning

confidence: 99%

Functional response of Trichogramma pretiosum on Trichoplusia ni eggs at different temperatures and egg densities

Milanez

Carvalho

Lima

et al. 2018

Pesq. agropec. bras.

Self Cite

View full text Add to dashboard Cite

The objective of this work was to determine the functional response of the parasitoid Trichogramma pretiosum on Trichoplusia ni eggs at different temperatures (20, 25, and 30ºC) and egg densities (5, 10, 15, 20, 25, and 30 eggs). The logistic regression showed a type-II functional response for all temperatures. The search efficiency of T. pretiosum was reported as 0.049±0.0019, 0.069±0.0042 and 0.068±0.0033 per hour, and the estimated handling times were 1.82±0.0424, 1.69±0.0398, and 1.54±0.0498 hour at 20, 25 and 30ºC, respectively. Females of Trichogramma pretiosum show greater efficiency at 30ºC and a type-II functional response. The parasitism rate decreases, when host density increases.

show abstract

“…Females that did not produce adult offspring were removed from the analysis. Parasitism life-span was assessed as the average number of days that the female produced viable offspring (Dalvi et al 2014). Cumulative or life-time fecundity was calculated as the mean of parasitized eggs by female, and daily fecundity as the average parasitized eggs by female per day (Botto et al 2004, Dalvi et al 2014.…”

Section: Developmental Time and Fitnessmentioning

confidence: 99%

“…Parasitism life-span was assessed as the average number of days that the female produced viable offspring (Dalvi et al 2014). Cumulative or life-time fecundity was calculated as the mean of parasitized eggs by female, and daily fecundity as the average parasitized eggs by female per day (Botto et al 2004, Dalvi et al 2014. Similarly, cumulative fertility was assessed as the average of the adult offspring by female, and daily fertility as mean of adult offspring by female per day (Botto et al 2004).…”

Section: Developmental Time and Fitnessmentioning

confidence: 99%

The Fitness and Economic Benefits of Rearing the Parasitoid Telenomus podisi Under Fluctuating Temperature Regime

et al. 2019

View full text Add to dashboard Cite

Successful biological control requires detailed knowledge about the mass rearing conditions of the control agents in order to ensure higher quality of field-released insects. Thus, we investigated whether rearing fluctuating thermal condition would affect the fitness and costs of the parasitoid wasp Telenomus podisi Ashmead (a biocontrol agent used for controlling the Neotropical brown stink bug Euschistus heros (Fabricius)) when compared with parasitoid reared at constant temperature condition, which is commonly used in insect facilities. Parasitoids were reared under either constant (continuous exposure at 25 ± 2°C) or fluctuating temperature conditions (i.e., 30 ± 2°C during day and 20 ± 2°C at night) during four consecutive generations. Our results indicated that tested fluctuating temperature is more suitable for rearing of T. podisi as such temperature condition not only resulted in fitness benefits (e.g., shorter developmental time, longer female longevity, higher fecundity/fertility) but also reduced (approximately 23.5%) the estimated costs for producing the parasitoids. Furthermore, rearing T. podisi under fluctuating temperatures improved tolerance to low constant temperatures (i.e., 20°C) without changing the tolerance to constant high temperatures (30°C) in the fourth generation. Surprisingly, even parasitoids that developed under fluctuating thermal conditions performed better than those reared at constant temperature of 25°C. Collectively, our findings suggest that T. podisi reared under fluctuating thermal condition can tolerate better fluctuating temperatures that normally occur both during long periods of transport and in agricultural ecosystems, which will increase the quality and productivity of massreared T. podisi for inundative releases.

show abstract

<b>Parasitism capacity of <i>Trichogramma pretiosum</i> on eggs of <i>Trichoplusia ni</i> at different temperatures

Cited by 9 publications

References 38 publications

Biological parameters and thermal requirements of Trichogramma pretiosum reared on Helicoverpa armigera eggs

Biological parameters and thermal requirements of Trichogramma pretiosum reared on Helicoverpa armigera eggs

Functional response of Trichogramma pretiosum on Trichoplusia ni eggs at different temperatures and egg densities

The Fitness and Economic Benefits of Rearing the Parasitoid Telenomus podisi Under Fluctuating Temperature Regime

Contact Info

Product

Resources

About