Constant Versus Fluctuating Temperatures in the Interactions Between Plutella xylostella (Lepidoptera: Plutellidae) and Its Larval Parasitoid Diadegma insulare (Hymenoptera: Ichneumonidae)

2012 ◽  
Vol 41 (6) ◽  
pp. 1653-1661 ◽  
Author(s):  
Md H. Bahar ◽  
Juliana J. Soroka ◽  
Lloyd M. Dosdall
Keyword(s):  
Plutella Xylostella ◽  
Diadegma Insulare ◽  
Larval Parasitoid ◽  
Constant Versus ◽  
Fluctuating Temperatures

scholarly journals Impact of Constant Versus Fluctuating Temperatures on the Development and Life History Parameters of Aldrichina grahami (Diptera: Calliphoridae)

Insects ◽  
2019 ◽  
Vol 10 (7) ◽  
pp. 184 ◽  
Author(s):  
Wei Chen ◽  
Li Yang ◽  
Lipin Ren ◽  
Yanjie Shang ◽  
Shiwen Wang ◽  
...  
Keyword(s):  
Life History ◽  
Ambient Temperature ◽  
Developmental Rate ◽  
Threshold Temperature ◽  
Life History Parameters ◽  
Temperature Regimes ◽  
Cold Tolerant ◽  
Constant Versus ◽  
Forensic Tools ◽  
Fluctuating Temperatures

Necrophagous fly species are commonly used as forensic tools to estimate the minimum postmortem interval (PMImin). Many researchers raised necrophagous flies under constant temperature regimes to collect their developmental data. However, in most forensic cases, the ambient temperature fluctuates. In order to investigate a forensically important fly developmental mode (the Isomegalen diagram, Isomorphen diagram and Thermal summation models) and make comparisons of the developmental rate between constant temperatures and fluctuating temperatures, we used Aldrichina grahami (Diptera: Calliphoridae) to investigate the life history parameters at eight constant temperatures ranging from 8 to 36 °C. We also compared developmental rate of A. grahami in three groups of constant versus fluctuating temperatures: 8 °C vs. 6–12 °C, 12 °C vs. 10–16 °C, and 16 °C vs. 14–20 °C. Our data showed that A. grahami is cold tolerant with a mean (±SE) development threshold temperature (D0) of 3.41 ± 0.48 °C and a thermal summation constant (K) of 8125.2 ± 288.4-degree hours. The three groups subjected to fluctuating temperatures took longer to develop compared to those developing in constant temperatures when simulated in a model. These results not only provide detailed developmental data for the use of A. grahami in the estimation of the PMI, but also indicate that ambient temperature fluctuation must be taken into consideration for the use of all necrophagous fly species.

Influence of Selected Insecticides on the Population Dynamics of Diamondback Moth (Lepidoptera: Plutellidae) and Its Parasitoid, Diadegma insulare (Hymenoptera: Ichneumonidae), in Cabbage

2003 ◽  
Vol 38 (1) ◽  
pp. 59-71 ◽  
Author(s):  
Travis A. Hill ◽  
Rick E. Foster
Keyword(s):  
Population Dynamics ◽  
Plutella Xylostella ◽  
Diamondback Moth ◽  
Diadegma Insulare ◽  
Economic Thresholds ◽  
Percent Parasitism

The effects of insecticides on the diamondback moth, Plutella xylostella (L)., and its parasitoid, Diadegma insulare (Cresson), were evaluated in the field. Insecticides applied for control of the diamondback moth caused variations in parasitism by D. insulare ranging from 20 to 84%. Permethrin applications were effective at controlling diamondback moth. Applications of spinosad also resulted in low diamondback moth populations; however, percent parasitism was higher than in untreated plots and over 4× higher than in plots treated with permethrin. Selective materials that conserve D. insulare populations and maintain diamondback moth populations below economic thresholds may reduce the frequency of application, thus prolonging the efficacy of these materials.

scholarly journals Comparación Agroeconómica de dos Sistemas de Manejo de Plutella xylostella (L.) en Repollo en Estelí, Nicaragua

Ceiba ◽  
1970 ◽  
Vol 48 (1-2) ◽  
pp. 83-87
Author(s):  
Ernesto Garay ◽  
Alfredo Rueda
Keyword(s):  
Plutella Xylostella ◽  
Diadegma Insulare ◽  
Palabras Clave ◽  
El Sistema

De septiembre a diciembre de 2000 se compararon dos sistemas de manejo de Plutella xylostella, el manejo convencional calendarizado que hacen los productores de repollo y un sistema de Manejo Integrado de Plagas (MIP). La cantidad de larvas de plutella en el repollo manejado bajo el sistema MIP fue menor que en el manejado convencionalmente. Diadegma insulare parasitó a P. xylostella 30% en el sistema MIP y 7% en el sistema convencional (P = 0.001). Los costos diferenciales y totales fueron mayores en el sistema MIP, así como los ingresos bruto y neto (P = 0.04). El costo total aumentó 10% y el ingreso neto 201%, al cambiar del sistema tradicional al MIP. Palabras clave: Costo diferencial, MIP, parasitoide, plutella. DOI: http://dx.doi.org/10.5377/ceiba.v48i1-2.438 Ceiba, 2007. Volumen 48(1-2): 83-87

A food-supply device for maintaining Cotesia vestalis, a larval parasitoid of the diamondback moth Plutella xylostella, in greenhouses

BioControl ◽  
2014 ◽  
Vol 59 (6) ◽  
pp. 681-688 ◽  
Author(s):  
Takeshi Shimoda ◽  
Takayuki Mitsunaga ◽  
Masayoshi Uefune ◽  
Junichiro Abe ◽  
Soichi Kugimiya ◽  
...  
Keyword(s):  
Plutella Xylostella ◽  
Food Supply ◽  
Diamondback Moth ◽  
Cotesia Vestalis ◽  
Larval Parasitoid
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