Número de gerações de um percevejo e seu parasitoide e da severidade da ferrugem asiática em soja, simulados em cenários de clima e manejo no norte do RS

Chevarria, V. V.; Ponte, Emerson Medeiros de Agronomia Departamento de Fitossanidade Del Faculdade; Jahnke, Simone Mundstock

doi:10.1590/s0103-84782013000400002

Cited by 6 publications

(4 citation statements)

References 13 publications

(11 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There was no signi cant difference between strategies with more than one release of 5,000 or more females when considering the offspring of the released parasitoids, due to the large population growth of these parasitoids during the simulation, since the parasitoid development cycle is faster than the E. heros cycle (Chevarria et al 2013). In these strategies, the parasitism capacity of the T. podisi population exceeds the number of eggs laid by the stink bugs, extinguishing the pest population during the simulation.…”

Section: Discussionmentioning

confidence: 99%

“…There was no significant difference between strategies with more than one release of 5000 or more females when considering the offspring of the released parasitoids, due to the large population growth of these parasitoids during the simulation, since the parasitoid development cycle is faster than the E. heros cycle. 55 In these strategies, the parasitism capacity of the T. podisi population exceeds the number of eggs laid by the stink bugs, extinguishing the pest population during the simulation. Thus, from a theoretical perspective, the limiting factor on the differentiation of the efficiency of the parasitoid release strategies in the model was the size of the stink-bug population assumed for the simulations (for the configuration in which the parasitoid offspring are not eliminated at emergence), which in turn depends on the initial number of adults that colonize the grid.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

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

Weber

Garcia

Bueno

et al. 2022

Pest Management Science

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

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

View full text Add to dashboard Cite

show abstract

“…In addition, climatic changes such as global warming (Kiritani, ; Musolin, ) may create favorable conditions for the development of this insect pest. All these factors, together with its polyvoltinism (Chevarria et al., ), could have led to high population densities and a wide distribution of E. heros , which could have contributed to reduced population differentiation and increased genetic diversity.…”

Section: Discussionmentioning

confidence: 99%

Structure and genetic variation among populations of Euschistus heros from different geographic regions in Brazil

Husch

Ferreira

Seraphim

et al. 2018

Entomologia Exp Applicata

View full text Add to dashboard Cite

The Neotropical brown stink bug, Euschistus heros (Fabricius) (Hemiptera: Pentatomidae), is a major Brazilian soybean pest. Aiming to provide relevant information to implement pest and insecticide resistance management, new microsatellite loci were developed for E. heros and used in a study of genetic diversity and population structure. The population analysis was performed using eight microsatellite loci from 17 samples (n = 243 individuals) collected in the major soybean‐producing regions in Brazil (northeastern, midwestern, and southern regions). These microsatellite loci provided high genetic diversity values on the whole extension for the studied region (He = 0.895; total number of alleles = 400). Neotropical brown stink bug populations in general displayed low genetic structure levels among the samples (overall ΦST = 0.009). An exception was the sample from the northeastern region, which showed a significant genetic differentiation (pairwise ΦST = 0.031–0.063). Bayesian cluster analysis confirmed these results, did not show population subdivision, and indicated considerable levels of gene flow. Significant correlations between genetic differences and geographic distance were obtained. The lowest estimate of migration was found in the population from São Desidério, which was also the most distant from the remaining populations based on genetic distance. Some plausible hypotheses for the low genetic differentiation among these populations are the fast expansion of soybean production areas, the main food source of E. heros, polyvoltinism, and possible influence of anthropogenic dispersal. All these factors could have led to high population densities, a wide distribution that may contribute to reduced population differentiation, and increased genetic diversity.

show abstract

“…Specific crop coefficients (provided in a program file) and genetic coefficients of cultivars (calibrated for the genotype of interest) enable simulations of further responses of a given cultivar under varied environmental conditions. In Brazil, the DSSAT software has been used to evaluate growth and production of crops such as common beans (OLIVEIRA et al, 2012;DALLACORT et al, 2011), cowpea beans (LIMA FILHO et al, 2013), soybeans (RODRIGUES et al, 2012;CHEVARRIA et al, 2013), corn (ALVES et al, 2011), sugarcane (NASSIF et al, 2012MARIN et al, 2013;GOMES et al, 2014. ), and perennial forages (PEDREIRA et al, 2011;LARA et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Calibration and Testing of Cs-Cropgro Model for Common Beans

et al. 2016

View full text Add to dashboard Cite

Simulation models of crop growth enable estimating crop yield and water balance components with low cost and high precision. This study aimed to calibrate and evaluate the performance of the CS-CROPGRO model for common beans under the conditions of Jaboticabal city (SP), Brazil. The model was calibrated and tested with data previously collected from two experiments conducted in 2002 and 2003. In these experiments, treatments corresponded to two irrigation scheduling methods (tensiometers and class A pan evaporation) and two cropping systems (conventional and no-till). For calibration, data from the experiment carried out in 2002 were used. For testing, we used data from the experiment conducted in 2003. By using the genetic coefficients calibrated for cultivar IAC-Carioca, the model could correctly simulate phenology, leaf area, dry matter and grain yield during both, calibration and testing, under no-till and conventional systems, combined with tensiometer and class A pan irrigation scheduling methods. Conversely, the model did not show the same performance for soil moisture simulations.

show abstract

Número de gerações de um percevejo e seu parasitoide e da severidade da ferrugem asiática em soja, simulados em cenários de clima e manejo no norte do RS

Cited by 6 publications

References 13 publications

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

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

Structure and genetic variation among populations of Euschistus heros from different geographic regions in Brazil

Calibration and Testing of Cs-Cropgro Model for Common Beans

Contact Info

Product

Resources

About